Department of Soil Science and Agricultural Chemistry, Banaras Hindu University, Varanasi, Uttar Pradesh
A field experiment with rice was conducted to study the manganese-phosphate interrelationship in an alluvial soil. The maximum grain yield was obtained with 100 kg P2O5+25 kg Mn per hectare. Manganese application without P decreased the yield. The concentration of P and Mn in plant and in soil increased with increasing levels of added P and Mn, respectively. Addition of P decreased significantly the Mn content in grain and straw. Addition of Mn at low levels (10 kg ard 25 kg Mn/ha) increased P content of plant at all the stages. A significant positive correlation between P and Mn uptake and between available P and Mn were observed at all the stages of the cropg rowth.
Mn-P interaction, rice, Mn and P response, nutrient uptake, availability and yield, alluvial soil
