Polysulphate increased sugarcane yield 4.5% over conventional grower standard practice.
USDA ARS Sugarcane Research Unit, White Castle, Louisiana, USA
To evaluate Polysulphate as a K fertilizer source for sugarcane grown in sandy, silt-loam soils in southern Louisiana, USA.
Grower standard practice consisted of 135 kg N/ha in the form of urea, 45 kg P2O5/ha in the form of DAP and 135 kg K2O/ha in the form of KCl. There were two Polysulphate treatments which were duplicates of the grower standard practice , but with the K portion being made up of 50:50 Polysulphate & KCl, or 100% Polysulphate.
- Supplying 50% of the K dose as Polysulphate increased the sugarcane yield by 504 kg/ha (4.5%) over conventional grower standard practice.