GB813805A - Improvements in or relating to mixed fertilisers - Google Patents

Improvements in or relating to mixed fertilisers

Info

Publication number
GB813805A
GB813805A GB3575955A GB3575955A GB813805A GB 813805 A GB813805 A GB 813805A GB 3575955 A GB3575955 A GB 3575955A GB 3575955 A GB3575955 A GB 3575955A GB 813805 A GB813805 A GB 813805A
Authority
GB
United Kingdom
Prior art keywords
nitrate
nitrogen
phosphate
potassium
ammonium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3575955A
Inventor
Arthur Jacob-Steinorth
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wintershall AG
Original Assignee
Wintershall AG
Filing date
Publication date
Application filed by Wintershall AG filed Critical Wintershall AG
Publication of GB813805A publication Critical patent/GB813805A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B17/00Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)

Abstract

A mixed fertilizer comprises a soft earthy crude phosphate, a potassium salt and a nitrogen compound which releases a mineral acid in the presence of nitrifying bacteria in the soil, the nitrogen content being up to 5 per cent. by weight of the fertilizer and the ratio by weight N:P2O5 being up to 0,5, preferably up to 0,3. The particle size of the mixture is preferably 0,2-1 mm. Two examples are given, the nitrogen compounds being respectively ammonium sulphate nitrate and ammonium sulphate and the potassium salt, potassium sulphate. The phosphates are referred to as Kouri phosphate and "hyperphosphate" respectively. Other nitrogen compounds suitable are ammonium nitrate, ammonium chloride, sodium nitrate and potassium nitrate. Experiments are described showing the advantage of using initially a fertilizer according to the invention which incorporates the nitrogen compound releasing a mineral acid which in turn solubilizes the phosphate, over the initial use of fertilizers without such a compound, followed at a later date by its separate addition.
GB3575955A 1955-12-13 Improvements in or relating to mixed fertilisers Expired GB813805A (en)

Publications (1)

Publication Number Publication Date
GB813805A true GB813805A (en) 1959-05-21

Family

ID=1744378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3575955A Expired GB813805A (en) 1955-12-13 Improvements in or relating to mixed fertilisers

Country Status (1)

Country Link
GB (1) GB813805A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323692B1 (en) * 1998-07-02 2014-08-13 S.I.P.C.A.M. Società Italiana Prodotti Chimici e Per L' Agricoltura Milano S.p.A Microgranular fertiliser composition for sowing and transplanting

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1323692B1 (en) * 1998-07-02 2014-08-13 S.I.P.C.A.M. Società Italiana Prodotti Chimici e Per L' Agricoltura Milano S.p.A Microgranular fertiliser composition for sowing and transplanting

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