Slow-release fertilizers

Details Slow-release fertilizers Slow-release fertilizers

1975-02-13

1976-11-16

Spear, Jr., Frank A.

Chemistry: fertilizers

Processes and products

Inorganic material

71 1, 71 31, 71 53, 71 63, 71 64B, 71 64F, 106 52, C05D 1100

Patent

active

039921840

ABSTRACT:
A fertilizer from which potassium is released slowly comprises a frit produced from a potassium/silicon composition in the range K.sub.2 O.2SiO.sub.2 to K.sub.2 O.4SiO.sub.2 and containing from 5.5% to less than 10% by weight of calcium oxide.

REFERENCES:
patent: 3726657 (1973-04-01), Verdaw
patent: 3734756 (1973-05-01), Pierce
patent: 3811853 (1974-05-01), Bartholemew et al.
patent: 3824106 (1974-07-01), Adams et al.

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