[Tablet complex fertilizers for fertilization under plants (of weed crops especially)]
1997
Gavriluta, I. | Borlan, Z. | Dorneanu, A. | Alexandrescu, Ariadna | Nebunelea, Dobrita | (Institutul de Cercetari pentru Pedologie si Agrochimie, Bucuresti (Romania)) | Budoi, Gh. (Universitatea de Stiinte Agricole, Bucuresti (Romania)) | Catanescu, V. (Statiunea de Cercetari pomicole, Maracineni (Romania)) | Bandu, Gh. (Statiunea de Cercetare si Productie pentru Pomicultura, Caransebes (Romania)) | Bireescu, L. (Universitatea de Stiinte Agricole, Bucuresti (Romania)) | Dornescu, D. | Rusu, C. (Statiunea de Cercetari Agricole Podu-Iloaiei (Romania)) | Iancu, D. (Statiunea de Cercetari pentru Cultura Plantelor Tehnice, Pitesti (Romania))
The view of diminishing nutrient contacts with soil colloids and the irrigation of soluble nutrient ions in the soil profile, a mixture of clay and coal, containing up to 40 per cent C and lignosulfates with 50 per cent of dry organic matter (lignoles) were used to produce pressed in tablets complex fertilizers with a total of N+P2O5+K2O content of up 26 per cent. These may be manufactured at different N:P2O5:K2O ratios. Dry and solid tablets with a dry mass of 15-20 g/tablets have been tested in accurate field experiments, aimed at comparison of equal amounts of nutrients included in tablets and applied locally under plant seed with equal amounts of nutrients in powdered from thoroughly mixed in soil ploughed layer, recording the yields of mature plants. So far obtained experimental data have shown that pressed in tablets fertilizers give rise to an increased agronomic effectiveness as compared with powdered nutrient compounds mixed in the soil.
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