N.p.k. mg fertilizer and method for producing same

Details N.p.k. mg fertilizer and method for producing same N.p.k. mg fertilizer and method for producing same

C - Chemistry, Metallurgy

05

D

71/32

C05D 1/02 (2006.01) C05G 1/00 (2006.01)

Patent

CA 1084723

ABSTRACT Langbeinite (2MgSO4?K2SO4) is reacted with diammonium phosphate (NH4)2HPO4 to yield a dry (solid) farm field fertilizer of grade 21-12-7 + 1.22 Mg. The chemical process also provides for a solid or dry farm field "double cropping" fertilizer. The cost of liquid and granular fertilizers containing substan- tial amounts of magnesium has been reduced to where they are competitive with commercial N-P -K fertilizers that do have this feature. These fertilizers contain magnesium in the presence of phosphorus. The micro-nutrients Zn, Cu , Fe ,Mn , and B may be added in rates proportional to deficiency shown by field tests.

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