Nitrogen Use Efficiency and Yield of Corn (Zea Mays L.) as Affected by Weed Management and Time of Nitrogen Fertilizer Apllication PDF Download

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Nitrogen Use Efficiency and Yield of Corn (Zea Mays L.) as Affected by Weed Management and Time of Nitrogen Fertilizer Apllication

Nitrogen Use Efficiency and Yield of Corn (Zea Mays L.) as Affected by Weed Management and Time of Nitrogen Fertilizer Apllication PDF Author: Vivas Caraniwan, I
Publisher:
ISBN:
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Languages : en
Pages : 148

Book Description
A study was conducted to determine the effect of weed control methods and time of nitrogen fertilizer application on yield and nitrogen fertilizer use efficiency of corn and to identify weed control practice(s) and time(s) of nitrogen fertilizer application that promote nitrogen use efficiency and high yield of corn at minimum cost. Weed control methods had no significant effects on all parameters studied except for leaf area index (LAI) and weed fresh weight at 50 DAP. Leaf area indices from W6 (handweeding four times) and W5 (preemergence application of atrazine + pendimethalin + hilling-up) were significantly higher than W1 (off-barring + hilling-up) and W2 (hoeing + hilling-up). W6 gave the mst effective control of weeds based on fresh weed weight at 50 DAP. W2 and W5 provided poor control of weeds. W1 and W4 (preemergence application of pendimethalin + spot hoeing + hilling-up) provided less satisfactory control of weeds than W6 but better control than W3 (preemergence application of atrazine + spot hoeing + hilling-up). The differences in crop LAI and weed control efficacies were not reflected in grain yield and nitrogen use efficiency of the crop indicating that all the six weed control methods provided adequate control of weeds in the trial site. The time of N fertilizer application signifantly affected early crop growth and vigor, days to tasseling and silking, plant and ear height, leaf area index, total dry matter yied, ear kernel filling length, number of kernel rows per ear, number of kernels (...).
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