Research Article 
Nitrogen Level and Plant Density Effects on Different Agro-physiological Traits of Maize
Tariq Mahmood and Muhammad Saeed
Pakistan Journal of Biological Sciences, 1998, 1(4), 259-263.
Abstract
Nitrogen level and plant density effects on different agro-physiological traits of maize cv., "Golden" were studies under field conditions at the Agriculture Research Area, University of Agriculture, Faisalabad in Autumn 1996. Treatments comprised four nitrogen levels, i.e., 0, 100, 200 and 300 kg N ha–1 and three plant densities viz., 11.11, 8.33 and 6.67 plants m–2. Yield components, such as number of cobs per plant, number of grains per cob and 1000-grain weight were decreased at higher plant density and low nitrogen levels. The maximum grain yield of 7.11 t ha–1 was recorded from the crop fertilized at 300 kg N ha–1 and raised at 11.11 plants m–2, while the minimum (2.03 t ha–1) was found in control (plant density of 6.67 plants in without N fertilization). The results suggest that 200-300 kg N ha–1 along with 11.11 plants m–2 should be used to obtain the maximum grain yield to maize cv. "Golden" under the edaphic and climate conditions matching to those of the experiment.
ASCI-ID: 1-748
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