Potassium Status of Alluvial Meadow Soil in a Vegetable-fodder Crop Rotation in the Moskva River Floodplain under Long-term Fertilization
A long-term stationary experiment in a vegetable-forage crop rotation on alluvial meadow soil (1975- 1977 - 2005-2007) showed that the optimization of potassium status required the application of 250- 300 kg K2O/ha for white cabbage and 150-200 kg K2O/ha for edible roots. Lower application rates of potassium fertilizers resulted in a signifi cant decrease of exchange potassium (by to 20%) and potentially available potassium in the soil.