FERTILIZZANTE AZOTATO GRANULARE, AD AZIONE PROLUNGATA, E PROCEDIMENTO PER LA SUA FABBRICAZIONE.

摘要

A granulated slow-release nitrogen fertiliser is described which is based on urea and/or ammonium salts and composed of three layers, where the innermost layer is composed of urea and/or ammonium salts, the middle layer of calcium compounds and/or magnesium compounds and the outermost layer of calcium cyanamide. These nitrogen fertilizer granules have a good slow-release action and good properties on application and can be prepared in a very simple and cost-effective manner.