FIELD: fertilizers production. SUBSTANCE: fertilizers are prepared from humate-containing naturally-occurring substances such as peat, sapropel, and brown coal. Initial substance is treated at ambient temperature with potassium pyrophosphate at ratio 25:1. Then, substance is enriched with nitrogen in the same process tank. EFFECT: simplified production process. 3 cl, 3 ex
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Authors
Dates
2000-11-20—Published
1999-05-25—Filed