PROCESS FOR PRODUCING PLANT NUTRITIVE COMPOSITION WITH SLOW RELEASE OF ACTIVE INGREDIENT AND THE NUTRITIVE COMPOSITION

摘要

A slow-release plant-food compsn. is prepd. by applying a mixt. to the surface of 100 pts.wt. of N, P, K fertiliser granules. The mixt. comprises (all pts.wt.): 1.0-1.2 powdered substrate, 1.0-1.2 iron chelate, 0-12 cryst. manganese-sulphate, 0.02-0.24 boric acid, 0.05-0.06 cryst zinc-sulphate, 0.22-0.24 magnesium-sulphate, 0.04-0.06 crystalline cobalt-sulphate, 0.005-0.006 crystalline ammonium-heptamolybdate, 0.004-0.005 crystalline copper-sulphate, 0.01-0.02 2-naphthyl-acetic-acid, 0.001-0.002 gibberellic acid. Finally, a drying (plant) oil coating is applied and opt. coated granules are tabletted.