Optimal rates and ratios of NPK for fertilization of sugar beet


Lichev, S.; Gushevilov, Z.; Kuzmanov, A.; Dimov, S.

Rasteniev"dni Nauki 11(9): 62-70

1974


In field trials in 1968-73 on different soils of the main sugar-beet growing areas of Bulgaria, optimum fertilizer rates were 100-120 kg N + 80-100 kg P2O5/ha on calcareous chernozem, 120-140 kg N + 60-80 kg P2O5 + 60-80 kg K2O/ha on podzolized chernozem, 180-200 kg N + 140-160 kg P2O5/ha on leached chernozem and 160-180 kg N + 150 kg P2O5/ha on chernozem-smolnitsa. The optimum ratios of N:P2O5 ranged from 1.0:0.8 to 1.0:0.6.