09. Planting densities and Nitrogen level impact on yield and yield component of maize
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Abstract
An experiment was conducted to find out “Effect of planting densities and nitrogen levels on yield and yield components of maize” at Toru Mardan, Khyber Pakhtunkhwa, Pakistan, during Kharif season 2014. The experiment was laid out in randomized complete block design with four replications. Treatments of the experiment were three plant population (46000, 56000, 66000 plantsha-1) and three Nitrogen level (200, 250, 300kg N ha-1). For sowing purpose Azam variety was used and all other agronomic practices were used. The finding of study revealed that planting densities had significant influence on grain ear-1, grain row-1, number of rows ear-1, thousand grain weight, biological yield, grain yield, and harvest index. The influence of nitrogen was found significant in all parameter. Interaction was found non-significant for all parameters. Application of 300 kg ha-1 nitrogen showed higher grain ear-1 (492), grain row-1 (38), number of rows ear-1 (17) thousand grain weight (299 g) , biological yield (14861 kg ha-1), grain yield (6119 kg ha -1) and harvest index(41%). Planting densities of 66000 plants ha-1 had more grain ear-1 (475), grain row-1(37), number of rows ear-1 (17), thousand grain weight(276g), biological yield (14395 kg ha -1) and high grain yield (5775 kg ha -1) . It is concluded from the result that plant population with 66000 plants -1 with 300 kg N ha-1 produced higher grain yield of maize in the agro ecological climate of Mardan.
Keyword: Nitrogen; maize; yield and yield components