Nutrient uptake in maize under different weed and nutrient management options

Results of field experiment carried out during Kharif 2011 and 2012 at Instructional Farm, Rajasthan College of Agriculture, Udaipur, indicated various weed-management treatments significantly enhanced N and P uptake by maize (Zea mays L.) and reduced removal of nutrients by weeds as compared to weedy check. Maximum saving of 52.96% nitrogen and 51.87 % phosphorus was achieved with oxyfluorfen 0.15 kg/ha pre-emergence fb one hoeing 30 DAS. On pooled basis, this treatment gave 163.57% and 95.86%more grain and stover yield, respectively compared to weedy check, which was followed by metribuzin 0.25 kg/ha pre-emergence fb one hoeing 30 DAS. The yield as well as uptake of N and P by the crop was maximum with 150% RDF which were statistically at par with 125% RDF.