Effect of weed density on leaf area index and biological yield of maize
Saeed, M. (Khyber Pakhtunkhwa Agricultural Univ., Peshawar (Pakistan)) | Marwat, K.B. (Khyber Pakhtunkhwa Agricultural Univ., Peshawar (Pakistan)) | Gul, B. (Khyber Pakhtunkhwa Agricultural Univ., Peshawar (Pakistan)) | Hussain, Z. (Khyber Pakhtunkhwa Agricultural Univ., Peshawar (Pakistan)) | Ali, H. (University of Swat (Pakistan). Inst. of Plant Sciences and Biodiversity)
Competition studies between maize and weed were undertaken during summer season of 2006 and 2007 at Agricultural Research Farm, Khyber Pukhtunkhwa Agricultural University Peshawar, Pakistan. A Randomized Complete Block (RCB) design was used with split plot arrangements, having twenty eight treatments and three replications. Four plant spacings viz., 15, 20, 25 and 30 cm were allotted to main plots while seven weed densities of 0, 3, 6, 9, 12, 15 and 18 plants m-2 were assigned to the sub plots. Data were recorded on days to tasseling, days to maturity, leaf area index and biological yield (t ha-1). Narrow plant spacing of 15 cm resulted in higher leaf area index and biological yield in comparison with 30 cm plant spacing. Biological yield and leaf area index decreased with increasing weed density. Similarly days to tasseling and maturity were also delayed by increasing weed density.
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