{
  "url": "https://openlegislation.uk/fertilisers-regulations-1991/schedule-1/crossheading-straight-fertilisers",
  "json_url": "https://openlegislation.uk/fertilisers-regulations-1991/schedule-1/crossheading-straight-fertilisers.json",
  "legislation": "uksi/1991/2197",
  "legislation_title": "The Fertilisers Regulations 1991",
  "legislation_url": "https://openlegislation.uk/fertilisers-regulations-1991",
  "path": "schedule/1/crossheading/straight-fertilisers",
  "kind": "crossheading",
  "number": "SECTION A:",
  "heading": "STRAIGHT FERTILISERS",
  "text": "Group\nName of Material\nMeaning\nDeclarations\nLimits of variation (absolute value in percentage by weight, except where otherwise specified)\n(1)\n(2)\n(3)\n(4)\n(5)\n*This is only an indication of how the material should be named and accordingly this form of words should not be used in the statutory statement.\n(1)Technical information as complete as possible must be provided with each package or bulk consignment by the person responsible for marketing. This information must in particular enable the user to determine the rates and timing of application in relation to the crop being grown.\n1(a)\nAmmonium nitrate\nChemically obtained product containing ammonium nitrate as its essential ingredient, and possibly fillers such as ground limestone, calcium sulphate, ground dolomite, magnesium sulphate and kieserite. The nitrogen (N) content must be not less than 20%, and the nitric nigrogen and ammoniacal nigrogen fractions should each account for about half the nitrogen present.\nIf the product ... contains more than 28% by weight of nigrogen (N) it shall have the following additional characteristics (all the percentages specified being by weight):\n(i)It shall not contain any inorganic additive or inert substance other than those named above which might increase the product’s sensitivity to heat or its tendency to detonate. Heavy metals must not be added deliberately, and any traces which are incidental to the production process must not, by their presentce, increase the product’s sensitivity to heat or its tendency to detonate.\n(ii)The oil retention of the product, which must first have undergone two thermal cycles of a temperature ranging from 25°C to 50°C, must not exceed 4%.\n(iii)The percnetage of combustible material, measured as carbon, must not in the case of a product containing 31.5% or more of nitrogen exceed 0.2%, and must not in te case of a product containing between 28% and 31.5% of nitrogen exceed 0.4%.\n(iv)A solution of 10 grams of the product in 100 millilitres of water must have a pH of at last 4.5.\n(v)Not more than 5% of the product must be capable of passing through a 1 millimetre mesh sieve, and not more than 3% through a 0.5 millimetre mesh sieve.\n(vi)The chlorine content must not exceed 0.01%\n(vii)The copper content shall not exceed 10 mg/kg.\nAmount of total nitrogen\nAmount of nitric nitrogen\nAmount of ammoniacal nitrogen\n0.8 (for declarations up to and including 32%N)\n0.6 (for declarations exceeding 32%N)\nAs set out in paragraph 7(a) of this Schedule\nCalcium ammonium nitrate\nChemically obtained product containing ammonium nitrate as its essential ingredient. The nigrogen (N) content must be not less than 20%, and the nitric nigrogen and ammoniacal nitrogen fractions should each account for about half the nigrogen present. The product may contain, in addition to ammonium nitrate, only calcium carbonate (limestone) and/or magnesium carbonate and calcium carbonate (dolomite). The minimum content of these carbonates must be 20% and their purity level not less than 90%.\nAmount of total nitrogen\nAmount of nitric nitrogen\nAmount of ammoniacal nitrogen\n0.8\nAs set out in paragraph 7(a) of this Schedule\nAmmonium sulphate-nitrate\nChemically obtained product with ammonium nitrate and ammonium sulphate as essential ingredients, and containing not less than 25% ammoniacal and nitric nitrogen (N) with a minimum nitric nitrogen content of 5%.\nAmount of total nitrogen\nAmount of nitric nitrogen\nAmount of ammoniacal nitrogen\n0.8\nAs set out in paragraph 7(a) of this Schedule\nCalcium cyanamide\nChemically obtained product with calcium cyanamide as its essential ingredient, calcium oxide and possibly small quantities of ammonium salts and urea, and containing not less than 18% total nitrogen (N), at least 75% of the declared nitrogen being bound in the form of cyanamide.\nAmount of total nitrogen\n1.0\nCalcium magnesium nitrate\nNitrate of lime and magnesium\nChemically obtained product with calcium nitrate and magnesium nitrate as essential ingredients, containing not less than 13% nitric nitrogen (N), and not less than 5% magnesium, expressed as MgO, in the form of water-soluble salts.\nAmount of nitric nitrogen\nAmount of magnesium oxide soluble in water\n0.4\n0.9\nMagnesium nitrate.\nWhen marketed in the form of crystals a note “in crystallised form” may be added.\nChemically obtained product containing as its essential ingredient hexahydrated magnesium nitrate and containing not less than 10% nitric nitrogen (N) and 14% magnesium oxide (MgO).\nAmount of:—\nnitric nitrogen;\nmagnesium oxide soluble in water.\nCalcium nitrate\nNitrate of lime\nChemically obtained product containing calcium nitrate as its essential ingredient and possibly ammonium nitrate, and containing not less than 15% total nitrogen (N), with a maximum ammoniacal nitrogen content of 1.5%\nAmount of total nitrogen\nOptional declarations\nAmount of nitric nitrogen\nAmount of ammoniacal nitrogen\n0.4\nAs set out in paragraph 7(a) of this Schedule\nChile nitrate\nMagnesium ammonium nitrate\nProduct prepared from caliche, with sodium nitrate as its essential ingredient, and containing at least 15% nitric nitrogen (N).\nChemically obtained product with ammonium nitrate and magnesium compound salts (dolomite magnesium carbonate and/or magnesium sulphate) as essential ingredients and containing not less than 19% ammoniacal and nitric nitrogen (N) (with a minimum nitric nitrogen content of 6%) and not less than 5% magnesium expressed as total MgO.\nAmount of nitric nitrogen\nAmount of total nitrogen\nAmount of ammoniacal nitrogen\nAmount of nitric nitrogen\nAmount of total magnesium oxide\nOptional declarations\nAmount of magnesium oxide soluble in water\n0.4\n0.8\nAs set out in paragraph 7(a) of this Schedule\n0.9\n0.9\nMagnesium sulphonitrate\nChemically obtained product with ammonium nitrate, ammonium sulphate and magnesium sulphate as essential ingredients, and containing not less than 19% ammoniacal and nitric nitrogen (N), with a minimum nitric nitrogen content of 6%, and not less than 5% magnesium expressed as MgO in the form of water-soluble salts.\nAmount of total nitrogen\nAmount of ammoniacal nitrogen\nAmount of nitric nitrogen\nAmount of magnesium oxide soluble in water\n0.8\nAs set out in paragraph 7(a) of this Schedule\n0.9\nNitrogenous calcium cyanamide\nChemically obtained product with calcium cyanamide as its essential ingredient, calcium oxide and possibly small quantities of ammonium salts and urea plus added nitrate, and containing not less than 18% total nitrogen (N), at least 75% of the declared non-nitric nitrogen being bound in the form of cyanamide. The nitric nitrogen content must be not less than 1% and not greater than 3%.\nAmount of total nitrogen\nAmount of nitric nitrogen\n1.0\nAs set out in paragraph 7(a) of this Schedule\nSodium nitrate\nNitrate of soda\nChemically obtained product with sodium nitrate as its essential ingredient and containing not less than 15% nitric nitrogen (N).\nAmount of nitric nitrogen\n0.4\nSulphate of ammonia\nChemically obtained product with ammonium sulphate as its essential ingredient, and containing not less than 20% ammoniacal nigrogen (N).\nAmount of ammoniacal nitrogen\n0.3\nUrea\nChemically obtained product with carbonyl diamide (carbamide) at its essential ingredient, and containing not less than 44% total ureic nigrogen (N) (including biuret), with a maximum biuret content of 1.2%\nAmount of ureic nitrogen\n0.4\nCrotonylidene diurea\nProduct obtained by reaction of urea with crotonaldehyde. Monomeric compound containing not less than 28% nitrogen (N),, at least 25% nitrogen from the crotonylidene diurea. Maximum ureic nitrogen content: 3%\nAmount of—\ntotal nitrogen;\nureic nitrogen where this is at least 1% by weight;\nIsobutylidene diurea\nProduct obtained by reaction of urea with isobutyraldehyde. Monomeric compound containing not less than 28% nitrogen (N),, at least 25% nitrogen from the isobutylidene diurea. Maximum ureic nitrogen content: 3%\nAmount of—\ntotal nitrogen;\nureic nitrogen where this is at least 1% by weight;\nnitrogen from isobutylidene diurea\nUrea formaldehyde\nProduct obtained by reaction of urea with formaldehyde and containing as its essential ingredients molecules of urea formaldehyde. Polymeric compound containing not less than 36% nitrogen (N). At least 60% of the declared total nitrogen content must be soluble in hot water. At least 31% N from urea formaldehyde and a maximum ureic nitrogen content of 5%\nAmount of—\ntotal nitrogen;\nureic nitrogen where this is at least 1% by weight;\nnitrogen from urea formaldehyde that is soluble in cold water;\nnitrogen from urea formaldehyde that is soluble only in hot water\nNitrogenous fertiliser containing crotonylidene diurea\nProduct obtained chemically containing crotonylidene diurea and a straight nitrogen fertiliser [Group 1(a) of Section A of Schedule 1 of The Fertilisers Regulations 1991 excluding calcium cyanamide, nitrogenous calcium cyanamide, ammonium nitrate and calcium ammonium nitrate] containing not less than 18% nitrogen (N). At least 3% N in ammoniacal and/or nitric and/or ureic form. At least ⅓ of the declared total nitrogen content must be derived from crotonylidene diurea. Maximum biuret content: (ureic N + crotonylidene diurea N) × 0.026\nAmount of—\ntotal nitrogen;\nfor each form amounting to at least 1%:\nnitric nitrogen\nammoniacal nitrogen\nureic nitrogen;\nnitrogen from crotonylidene diurea\nNitrogenous fertiliser containing isobutylidene diurea\nProduct obtained chemically containing isobutylidene diurea and a straight nitrogen fertiliser [Group 1(a) of Section A of Schedule 1 of The Fertilisers Regulations 1991 excluding calcium cyanamide, nitrogenous calcium cyanamide, ammonium nitrate and calcium ammonium nitrate], containing not less than 18% nitrogen (N). At least 3% N in ammoniacal and/or nitric and/or ureic form. At least ⅓ of the declared total nitrogen content must be derived from isobutylidene diurea. Maximum biuret content: (ureic N + isobutylidene diurea N) × 0.026\nAmount of—\ntotal nitrogen;\nfor each form amounting to at least 1%:\nnitric nitrogen\nammoniacal nitrogen\nureic nitrogen;\nnitrogen from isobutylidene diurea\nNitrogenous fertiliser containing urea formaldehyde\nProduct obtained chemically containing urea formaldehyde and a straight nitrogenous fertiliser [Group 1(a) of Section A of Schedule 1 of The Fertilisers Regulations 1991 excluding calcium cyanamide, nitrogenous calcium cyanamide, ammonium nitrate and calcium ammonium nitrate], containing not less than 18% nitrogen (N). At least 3% N in ammoniacal and/or nitric and/or ureic form. At least ⅓ of the declared total nitrogen content must be derived from urea formaldehyde. The nitrogen from urea formaldehyde must contain ⅓ nitrogen soluble in hot water. Maximum biuret content: (ureic N + urea formaldehyde N) × 0.026\nAmount of—\nFor each form amounting to at least 1%:\nnitric nitrogen\nammoniacal nitrogen\nureic nitrogen;\namount of:—\nnitrogen from urea formaldehyde;\nnitrogen from urea formaldehyde that is soluble in cold water;\nnitrogen from urea formaldehyde that is soluble only in hot water\nAmmonium sulphate with dicyandiamide (nitrification inhibitor)\nChemically obtained product containing ammonium sulphate and dicyandiamide and containing not less than 20% nitrogen (N). The minimum ammoniacal nitrogen content should be 18% and the minimum content from dicyandiamide should be 1.5%\nAmount of—\ntotal nitrogen;\nammoniacal nitrogen;\nnitrogen from dicyandiamide.\nTechnical information\nAmmonium sulphonitrate with dicyandiamide (nitrification inhibitor)\nChemically obtained product containing ammonium sulphonitrate and dicyandiamide and containing not less than 24% nitrogen (N). The minimum nitric nitrogen content should be 3% and the maximum content from dicyandiamide should be 1.5%\nAmount of—\ntotal nitrogen;\nnitric nitrogen;\nammoniacal nitrogen;\nnitrogen from dicyandiamide.\nTechnical information.\nUrea-ammonium sulphate\nProduct obtained chemically from urea and ammonium sulphate containing not less than 30% nitrogen (N).\nMinimum ammoniacal nitrogen content: 4%.\nMinimum sulphur content expressed as sulphur trioxide: 12%.\nAmount of:\nTotal nitrogen:\nAmmoniacal nitrogen;\nUreic nitrogen;\nWater-soluble sulphur trioxide;\nMaximum biuret content: 0.9%.\n0.5\n} As set out in paragraph\n} 7(a) of this Schedule\n0.9\n1(b)\nStraight nitrogenous fertilisers names in accordance with Regulation 4(3)\nAny straight nitrogenous fertiliser not otherwise specified in this table.\nAmount of total nitrogen\n0.8\n1(c)\nNitrogenous fertiliser. In addition the source materials shall be indicated in parentheses in descending order of nutrient contribution\nProduct obtained by mixing or blending two or more of the fertilisers listed in Groups 1(a), 1(b) and 4(a) of section A of this table.\nAmount of total nitrogen\n0.5 (for declarations up to and including 10% N).\n0.8 (for delcarations exceeding 10% N and up to and including 15% N)\n1.1 (for declarations exceeding 15% N)\nAmount of ureic nitrogen save that a declaration of 10% or less need not be made\nAs set out in paragraph 7(b) of this Schedule\n2(a)\nAluminium–calcium phosphate\nProduct obtained in amorphous form by heat treatement and grinding, with aluminium and calcium phosphates as essential ingredients, and containing not less than 30% total phosphorus pentoxide (P2O5) (soluble in mineral acids), at least 75% of the declared total phosphorus pentoxide being soluble in alkaline ammonium citrate (Joulie). Not less than 90% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 98% through a sieve with a mesh of 0.630 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in alkaline ammonium citrate\n0.8\n0.8\nBasic slag\nThomas phosphates\nThomas slag\nProduct obtained in iron-smelting by treatment of the phosphorus melts and with calcium silicophosphates as essential ingredients, containing not less than 12% total phosphorus pentoxide (P2O5) (soluble in mineral acids) at least 75&:percnt; of the declared total phosphorus pentoxide being soluble in 2% citric acid. Not less than 75% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 96% through a sieve with a mesh of 0.630 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% citric acid\n1.0\nAs set out in paragraph 7(a) of this Schedule\nNo limits of variation are permitted when the declaration is expressed as a range of 2% by weight\nCalcined phosphate\nProduct obtained by heat treatment of ground rock phosphate with alkaline compounds and silicic acid, with alkaline calcium phosphate and calcium silicate as essential ingredients, and containing not less than 25% phosphorus pentoxide (P2O5) soluble in alkaline ammonium citrate (Petermann). Not less than 75% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 96% through a sieve with a mesh of 0.630 mm.\nAmount of phosphorus pentoxide soluble in alkaline ammonium citrate\n0.8\nDicalcium phosphate\nProduct obtained by precipitation of solubilised phosphoric acid from mineral phosphates or bones, with dicalcium phosphate dihydrate as its essential ingredient, and containing not less than 38% phosphorus pentoxide (P2O5) soluble in alkaline ammonium citrate (Petermann). Not less than 90% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 98% through a sieve with a mesh of 0.630 mm.\nAmount of phosphorus pentoxide soluble in alkaline ammonium citrate\n0.8\nPartially solubilised rock phosphate\nProduct obtained by partial solubilisation of ground rock phosphate with sulphuric acid or phosphoric acid, with monocalcium phsophate, tricalcium phsophate and calcium sulphate as essential ingredients, and containing not less than 20% total phosphorus pentoxide (P2O5) (soluble in mineral acids), at least 40% of the declared total phosphorus pentoxide being soluble in water. Not less than 90% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 98% through a sieve with a mesh of 0.630 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in water\n0.8\n0.9\nSoft ground rock phosphate\nProduct obtained by grinding soft mineral phosphates with tricalcium phosphate and calcium carbonate as essential ingredients and containing not less than 25% total phosphorus pentoxide (P2O5) (soluble in mineral acids), at least 55% of the declared total phosphorus pentoxide being soluble in 2% formic acid. Not less than 90% of the material should be able to pass through a seive with a mesh of 0.063 mm and not less than 99% through a sieve with a mesh of 0.125 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentixide soluble in 2% formic acid\nAmount of material as a percentage by weight that will pass through a sieve with a mesh of 0.063 mm\n0.8\n0.8\n5.0% of amount stated\nNormal superphosphate\nProduct obtained by reaction of ground mineral phosphate with sulphuric acid, with monocalcium phosphate as an essential ingredient as well as calcium sulphate, and containing not less than 16% phosphorus pentoxide (P2O5) soluble in neutral ammonium citrate, at least 93% of the declared phosphorus pentoxide soluble in neutral ammonium citrate being soluble in water.\nAmount of phosphorus pentoxide soluble in neutral ammonium citrate\nAmount of phosphorus pentoxide soluble in water\n0.8\n0.9\nConcentrated superphosphate\nProduct obtained by reaction of ground mineral phosphate with sulphuric acid and phosphoric acid, with monocalcium phosphate as an essential ingredient as well as calcium sulphate, and containing not less than 25% phosphorus pentoxide (P2O5) soluble in neutral ammonium citrate, at least 93% of the declared phosphorus pentoxide soluble in neutral ammonium citate being soluble in water.\nAmount of phosphorus pentoxide soluble in neutral ammonium citrate\nAmount of phosphorus pentoxide soluble in water\n0.8\n0.9\nTriple superphosphate\nProduct obtained by reaction of ground mineral phosphate with phosphoric acid, with monocalcium phosphate as its essential ingredient, and containing not less than 38% phosphorus pentoxide (P2OP5) soluble in neutral ammonium citrate, at least 93% of the declared phosphorus pentoxide soluble in neutral ammonium citrate being soluble in water.\nAmount of phosphorus pentoxide soluble in neutral ammonium citrate\nAmount of phosphorus pentoxide soluble in water\n0.8\n1.3\n2(b)\nPhosphatic neutral filter cake\nProduct obtained in detergent manufacture by treatment of phosphate rock with sulphuric acid and extraction of the soluble phosphates from the resulting precipitate, and containing not less than 20% total phosphorus pentoxide (P2O5) (soluble in mineral acids).\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% citric acid\n1.0\n1.0\nPhosphated slag\nProduct obtained by blending low grade basic slag and phosphate rock and containing not less than 16% total phosphorus pentoxide (P2O5) (soluble in mineral acids).\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% formic acid\n0.8\n0.8\nBasic slag medium concentration\nProduct obtained in iron smelting by treatment of phosphorus melts with calcium silicophosphates as essential ingredients and containing not less than 5% total phosphorus pentoxide (P2O5) (soluble in mineral acids), at least 75% of the declared total phosphorus pentoxide being soluble in 2% citric acid. Not less than 75% of the material should be able to pass through a sieve with a mesh of 0.160 mm and not less than 96;% through a sieve with a mesh of 0.630 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% formic acid\n0.1\n0.8\nNo limits of variation are permitted with the declaration is expressed as a range of 2% by weight\nGranular basic slag\nProduct obtained in iron smelting by treatment of phosphorus melts, with calcium silicophosphates as essential ingredients, and containing not less than 5% total phosphorus pentoxide (P2O5) (soluble in mineral acids), at least 75% of the declared total phosphorus pentoxide being soluble in 2% citric acid after the sample has been ground to pass through a sieve with a mesh of 0.160 mm. Not less than 70% of the material should be able to pass through a sieve with a mesh of 0.630 mm and not more than 12% through a sieve with a mesh of 0.160 mm.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% formic acid\n1.0\n0.8\nNo limits of variation are permitted with the declaration is expressed as a range of 2% by weight\nRock phosphate\nProduct not otherwise specified in this table obtained from mineral calcium phosphate deposits, to which no other matter has been added and containing not less than 5% total phosphorus pentoxide (P2O5) (soluble in mineral acids).\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% formic acid\nAmount of material as a percentage by weight that will pass through a sieve with a mesh of 0.150 mm\n0.8\n0.8\n5% of amount stated\n2(c)\nStraight phosphatic fertilisers named in accordance with Regulation 4(3)\nAny straight phosphatic fertiliser not otherwise specified in this table.\nAmount of total phosphorus pentoxide\n0.9\n2(d)\nPhosphatic fertiliser\nProduct obtained by mixing or blending two or more of the fertilisers listed in Groups 7(a), 2(b), 2(c) and 4(b) of Section A of this table.\nAmount of total phosphorus pentoxide\n0.5 (for declarations up to and including 10&[ercnt; P2O5)\n0.8 (for declarations exceeding 10% P2O5 and up to and including 15% P2O5\n1.1 (for declarations exceeding 15% P2O5\nIn addition the source materials shall be indicated in parentheses in descending order of nutrient contribution\nAmount of phosphorus pentoxide soluble in 2% formic acid\n0.8\n3(a)\nEnriched Kainit salt\nProduct obtained from crude potassium salts, enriched by blending with potassium chloride, and containing not less than 18% water-soluble potassium oxide (K2O).\nAmount of potassium oxide soluble in water\n1.0\nIn addition usual trading names may be given\nOptional declarations\nAmount of magnesium oxide soluble in water where this is greater than 5%\n0.9\nKainit\nProduct obtained from crude potassium salts, and containing not less than 10% water-soluble potassium oxide (K2O), and not less than 5% magnesium oxide (MgO) in the form of water-soluble salts.\nAmount of potassium oxide soluble in water\n1.5\nIn addition usual trading names may be given\nAmount of magnesium oxide soluble in water\n0.9\nMuriate of potash\nIn addition usual trading names may be given\nProduct obtained from crude potassium salts with potassium chloride as its essential ingredient, and containing not less than 37% water-soluble potassium oxide (K2O).\nAmount of potassium oxide soluble in water\n1.0 (for declarations up to and including 55% K2O)\n0.5 (for declarations exceeding 55% K2O)\nPotassium chloride containing magnesium salt\nProduct obtained from crude potassium salts with added magnesium salts, with potassium chloride and magnesium salts as essential ingredients, and containing not less than 37% water-soluble potassium oxide (K2O) and not less than 5% magnesium oxide (MgO) in the form of water-soluble salts.\nAmount of potassium oxide soluble in water\nAmount of magnesium oxide soluble in water\n1.5\n0.9\nSulphate of potash\nProduct obtained chemically from potassium salts, with potassium sulphate as its essential ingredient, and containing not less than 47% water-soluble potassium oxide (K2O) with a maximum chlorine (Cl) content of 3%\nAmount of potassium oxide soluble in water\nOptional declarations\nAmount of chlorine where this is lower than 3%\n0.5\n0.2\nSulphate of potash containing magnesium salt\nIn addition usual trading names may be given\nProduct obtained chemically from potassium salts with possible addition of magnesium salts, with potassium sulphate and magnesium sulphate as essential ingredients, and containing not less than 22% water-soluble potassium oxide (K2O) and not less than 8% magnesium oxide (MgO) in the form of water-soluble salts, with a maximum chlorine content of 3%\nAmount of potassium oxide soluble in water\nAmount of magnesium oxide soluble in water\nOptional declarations\nAmount of chlorine where this is lower than 3%\n1.5\n0.9\n0.2\nKieserite with potassium sulphate\nIn addition usual trading names may be given\nProduct obtained from Kieserite with potassium sulphate added and containing not less than 6% water-soluble potassium oxide (K2O) and not less than 8% magnesium oxide (MgO) in the form of water-soluble salts, where the two together are not less than 20%, with a maximum chlorine content of 3%\nAmount of potassium oxide soluble in water\nAmount of magnesium oxide soluble in water\nOptional declarations\nAmount of chlorine where this is lower than 3%\n1.5\n0.9\n0.2\n3(b)\nNitrate of potash\nPotassium nitrate for fertilising purposes.\nAmount of total nitrogen\nAmount of total potassium oxide\n0.5\n2.0\nPotassium basic slag\nA mixture of basic slag and muriate or sulphate of potash containing not less than 5% total phosphorus pentoxide (P2O5) (soluble in mineral acids) and not less than 5% total potassium oxide (K2O), at least 75% of the declared total phosphorus pentoxide being soluble in 2% citric acid.\nAmount of total phosphorus pentoxide\nAmount of phosphorus pentoxide soluble in 2% citric acid\nAmount of total potassium oxide\nAmount of slag as a percentage by weight that will pass through a sieve with a mesh of 0.5 mm\n1.0\n1.0\n1.0 (for declarations up to and including 15% K2O)\n2.0 (for declarations exceeding 15%K2O)\n5.0% of amount stated\nPotassic nitrate of soda\nChilean potash nitrate\nA mixture of sodium nitrate and potassium nitrate for fertilising purposes.\nAmount of total nitrogen\nAmount of total potassium oxide\n0.5\n0.8\n3(c)\nStraight potassic fertilisers named in accordance with Regulation 4(3)\nAny straight potassic fertiliser not otherwise specified in this table.\nAmount of total potassium oxide\n1.0\n3(d)\nPotassic fertiliser\nProduct obtained by mixing or blending two or more of the fertilisers listed in Groups 3(a), 3(b) and 3(c) of Section A of this table.\nAmount of total potassium oxide\n0.5 (for declarations up to and including 10% K2O)\nIn addition the source material shall be indicated in parentheses in descending order of nutrient contribution\n0.8 (for declarations exceeding 10% and up to and including 15% K2O)\n1.1 (for declarations exceeding 15% K2O)\n4(a)\nCastor meal\nThe residue which is obtained by the removal of oil from commercially pure castor seed.\nAmount of total nitrogen\n0.5\nDried blood\nBlood which has been dried, to which no other matter has been added, and which is used for fertilising purposes, containing not less than 11% total nigrogen.\nAmount of total nitrogen\n0.5\nHoofs\nThe product obtained by crushing or grinding hoof, to which no other matter has been added, containing not less than 12% total nitrogen.\nAmount of total nitrogen\n0.5\nHoofs and horns\nA mixture of hoof and horn, crushed or ground, to which no other matter has been added, containing not less than 12% total nitrogen.\nAmount of total nitrogen\n0.5\nHorns\nThe product obtained by crushing or grinding horn, to whch no other matter has been added, containing not less than 12% total nitrogen.\nAmount of total nitrogen\n0.5\nOilseed fertiliser\nProduct obtained by the removal of oil from seeds not otherwise specified in this table (excluding mowrah meal and used for fertilising purposes.\nAmount of total nitrogen\n0.5\n4(b)\nRape meal\nThe residue which is obtained by the removal of oil from commercially pure rape seed.\nAmount of total nitrogen\n0.5\nPrecipitated bone phosphate\nDicalcium bone phosphate\nAn insoluble calcium phosphate prepared by treating commercially pure bone with acid and precipitation of phosphate from the solution.\nAmount of phosphorus pentoxide soluble in citric acid\n1.0\n4(c)\nBone meal\nCommercially pure bone, raw or degreased, which has been ground or crushed, of which not less than 90% will pass through a sieve of 6.7 mm square apertures.\nAmount of total nitrogen\nAmount of total phosphorus pentoxide\n0.5\n1.5\nFish guano\nProduct obtained by drying and grinding or otherwise treating fish or fish waste, to which no other matter has been added.\nAmount of total nitrogen\n0.5\nFish manure\nAmount of total phosphorus pentoxide\n1.0\n4(b)\nMeat and bone meal\nMeat meal\nMeat and bone tankage\nCarcase meal\nThe product of drying and grinding or otherwise treating bone, flesh, fibre and other slaughterhouse residues, to which no other matter has been added.\nAmount of total nitrogen\nAmount of total phosphorus pentoxide\n0.5\n1.0\nRaw guano\nThe excrement and remains of any birds, except poultry, containing both nitrogen and phosphorus, prepared for use by screening where necessary, to which no addition has been made.\nAmount of total nitrogen\n20.0% of amount stated (with a minimum of 0.25% and a maximum of 1.5)\nAmount of total phosphorus pentoxide\n10.0% of amount stated (with a maximum of 2.0)\nAmount of total potassium oxide\n20.0% of amount stated\n4(c)\nShoddy manure\nWool waste\nWool combings\nWool manure\nFlock dust\nWaste of wool, or of wool mixed with fibrous materials such as are associated with wool in the textile industries including cotton and similar non-wool materials, to which no other matter has been added, the fibre content of which contains not less than 50% of wool by weight.\nNone\nNone\nSteamed bone flour\nCommercially pure bone, degreased and ground or crushed, from which the nitrogen has been partly or wholly removed by steam, of which not less than 75% will pass through a British Standard Test Sieve No. 16.\nAmount of total nitrogen\nAmount of total phosphorus pentoxide\n0.5\n1.0\nSteamed bone meal\nCommercially pure bone, degreased and ground or crushed, from which the nitrogen has been partly or wholly removed by steam, of which not less than 90% will pass through a sieve of 6.7 mm square aperture.\nAmount of total nitrogen\nAmount of total phosphorus pentoxide\n0.5\n1.0\n5(a)\nGround burnt lime\nCommercial calcium oxide containing not more than 27% magnesium as MgO and of which 100% will pass through a sieve of 6.3 mm.\nNeutralising value\n5.0% of amount stated\nKibbled burnt lime\nCommercial calcium oxide containing not more than 27% magnesium as MgO and of which 100% will pass through a sieve of 45 mm.\nNeutralising value\n5.0% of amount stated\nBurnt lime\nCommercial calcium oxide containing not more than 27% magnesium as MgO.\nNeutralising value\n5.0% of amount stated\nMagnesian ground burnt lime\nCommercial oxide obtained from magnesian limestone containing more than 27% magnesium expressed as MgO and of which 100% will pass through a sieve of 6.3 mm.\nNeutralising value\n5.0% of amount stated\nMagnesian kibbled burnt lime\nCommercial oxide obtained from magnesian limestone containing more than 27% magnesium expressed as MgO and of which 100% will pass through a sieve of 45 mm.\nNeutralising value\n5.0% of amount stated\nMagnesian burnt lime\nCommercial oxide obtained from magnesian limestone containing more than 27% magnesium as MgO.\nNeutralising value\n5.0% of amount stated\nChalk\nCretaceous limestone.\nNeutralising value\n5.0% of amount stated\nGround chalk\nCretaceous limestone of which 98% will pass through a sieve of 6.3 mm.\nNeutralising value\n5.0% of amount stated\nScreened chalk\nCretaceous limestone of which 98% will pass through a sieve of 45 mm.\nNeutralising value\n5.0% of amount stated\nHydrated lime\nProduct obtained by slaking burnt lime or magnesian burnt lime of which not less than 95% will pass through a 150 micron sieve.\nNeutralising value\n5.0% of amount stated\nGround limestone\nSedimentary rock consisting largely of calcium carbonate and containing not more than 15% of magnesium expressed as MgO and of which 100% will pass through a sieve of 5 mm, not less than 95% will pass through a sieve of 3.35 mm and not less than 40% will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nScreened limestone\nLimestone dust\nSedimentary rock consisting largely of calcium carbonate and containing not more than 15% of magnesium expressed as MgO and of which 100% will pass through a sieve of 5 mm, not less than 95% will pass through a sieve of 3.35 mm and not less than 20% will pass throug;h a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nCoarse screened limestone\nCoarse limestone dust\nSedimentary rock consisting largely of calcium carbonate and containing not more than 15% of magnesium expressed as MgO and of which 100% will pass through a sieve of 5 mm, not less than 90% will pass through a sieve of 3.35 mm and not less than 15% will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nMagnesian ground limestone\nSedimentary rock consisting largely of calcium and magnesium carbonates and containing not less than 15% of magnesium as MgO and of which 100% will pass through a sieve of 5mm, not less than 95% will pass through a sieve of 3.35 mm and not less than 40 % will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nMagnesian screened limestone\nSedimentary rock consisting largely of calcium and magnesium carbonates and containing not less than 15% of magnesium as MgO and of which 100% will pass through a sieve of 5mm, not less than 95% will pass through a sieve of 3.35 mm and not less than 20% will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nCoarse magnesian screened limestone\nCoarse magnesian limestone dust\nSedimentary rock consisting largely of calcium and magnesium carbonates and containing not less than 15% of magnesium as MgO and of which 100% will pass through a sieve of 5mm, not less than 90% will pass through a sieve of 3.35 mm and not less than 15% will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\nPulverised shells\nPulverised calcareous sea shells of which 100% will pass through a sieve with a mesh of 6.3 mm.\nNeutralising value\n5.0% of amount stated\nShell sand\nCalcareous sea sand of which 100% will pass through a sieve with a mesh of 6.3 mm.\nNeutralising value\n5.0% of amount stated\nMixed lime\nA product resulting from mixing two or more forms of liming material specified in this schedule not being materials for which there is no minimum standard laid down in column 3 of this schedule or material produced during the manufacture of commercial burnt lime or hydrated lime.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a sieve with a mesh of 6.3 mm\n5.0% of amount stated\n5.0% of amount stated\nFurnace slag\nThe unamended by-product of iron manufacture which has been reduced in size so that 100% will pass through a sieve with a mesh of 5 mm, not less than 95% will pass through a sieve with a mesh of 3.35 mm, and not less than 40% will pass through a 150 micron sieve.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\n5(b)\nLiming material named in accordance with Regulation 4(3)\nAny liming material not otherwise specified in Group 5(a) of Section A of this table and not injurious to plants or soil.\nNeutralising value\nAmount of material as a percentage by weight that will pass through a sieve with a mesh of 5 mm\nAmount of material as a percentage by weight that will pass through a sieve with a mesh of 3.353 mm\nAmount of material as a percentage by weight that will pass through a 150 micron sieve\n5.0% of amount stated\n5.0% of amount stated\n5.0% of amount stated\n5.0% of amount stated",
  "extent": "E+W+S",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "F",
      "label": "F1",
      "text": "Words in Sch. 1 revoked (30.1.1995) by The Fertilisers (Amendment) Regulations 1995 (S.I. 1995/16), regs. 1(1), 4(a)(i)"
    },
    {
      "type": "F",
      "label": "F2",
      "text": "Words in Sch. 1 inserted (30.1.1995) by The Fertilisers (Amendment) Regulations 1995 (S.I. 1995/16), regs. 1(1), 4(a)(ii)"
    },
    {
      "type": "F",
      "label": "F3",
      "text": "Words in Sch. 1 inserted (30.1.1995) by The Fertilisers (Amendment) Regulations 1995 (S.I. 1995/16), regs. 1(1), 4(a)(iii), Sch. 1"
    },
    {
      "type": "F",
      "label": "F4",
      "text": "Words in Sch. 1 inserted (14.7.1997) by The Fertilisers (Amendment) Regulations 1997 (S.I. 1997/1543), regs. 1(1), 3(a), Sch. 1"
    },
    {
      "type": "footnote",
      "label": "f1",
      "text": "*As determined by the Petermann method."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "*This is only an indication of how the material should be named and accordingly this form of words should not be used in the statutory statement."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/uksi/1991/2197/schedule/1/crossheading/straight-fertilisers",
    "retrieved_at": "2026-10-29T14:37:20.267878+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}