Przemysl Chemiczny, Vol.95, No.5, 1020-1024, 2016
The urea superphosphate-based NPS(M) fertilizer production technology. Part 1. The evaluation of fertilizer effect on development of maize root system after sub-soil application of the fertilizer
A NPS fertilizer was produced and granulated either by plate method with water vapor, water and optionally NH3 or by pulping method with H2SO4 water, urea and Ca-3(PO4)(2) in a paddle mixer and in a plate granulator. The fertilizer prepd. under pilot plant condition was applied sub-soil to maize root system in 5 combinations. The placement of micro-granules of tested fertilizer together with seeds (with a simultaneous placement of super granules) at the depth of 30 cm resulted in good development of the maize root system.