The experiment was laid out in Randomized Complete Block Design (factorial) with three replications having net plot size 3x4m=(12m 2). The effect of three sowing dates 25 th October, 10 th November and 25 th November on three hybrid maize varieties Pioneer 1543, Syngenta 4841 and Monsanto DK-6142 was studied. Yield components and grain quality parameters such as plant height, number of cobs per plant, cob length, grains per cob, grain yield, protein, starch and oil content of maize varieties were significantly affected by different sowing dates. It was concluded from the finding of present research work that all quantity and quality traits were promising when the sowing was completed up to 25 th October. Further delay of the sowing had negative effects on the performance of quantity and quality of maize. Hybrid maize variety Pioneer 1543 was promising variety which gave the grain yield more than 8312 kg ha-1 .

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This study was conducted, the effects of various weed control methods to suppress the growth and development of weeds for enhancing growth and yield of maize, at the experimental area of Agronomy section, Agriculture Research Institute, Tandojam, during winter season 2011-12. The experiment was comprised of five treatments viz; T1= Weedy check, T2= Hand hoeing, T3= Mechanical, T4= Cultural and T5= Chemical weed control in randomized complete block design (RCBD) with four replications. Different weed species were found in the experimental field viz; 1 Chenopodium album L, 2 Rumex dentatus L., 3 Phalaris minor, 4 Anagallis arvensis, 5 Convolvulus arvensis, 6 Chenopodium morale L, 7 Cynodon dactylon, 8 Cyperus rotundus. Results indicated that the Leaves plant-1 , Cobs plant-1 , Plant height (cm) and Grain yield kg ha-1 of maize were significant (p<0.05) and days to tasseling and silking were non-significant (p>0.05) in all treatments except weedy check. Hand hoeing weed control method effectively reduced weeds as compared to other weed control methods. On the other hand, when weeds frequency increased significantly decreased parameters of maize. It was concluded that the hand hoeing weed control method was found suitable and effective to suppress weeds and improved grain yield of hybrid maize crop as compare to other weed control methods.