Uptake Nitrogen as Affected by Various Combinations of Nitrogen and Phosphorus

摘要

An experiment to study the uptake of nitrogen by maize as affected by various combinations of nitrogen and phosphorus was conducted at Malakandher Research Farms, NWFP. Agricultural University Peshawar, Pakistan during 1997. Nitrogen and phosphorus had a significant effect on grain yield , nitrogen uptake at tasseling, maturity and in grain while non-significant effect of N and P was recorded for harvest index. Plots treated with NP combination of 150:90 kg ha ^-1 produced maximum grain yield while fertilizer combination of 150:120 NP kg ha ^-1 resulted in maximum nitrogen uptake at tesseling, maturity and in grain.