Saturday, 15 July 2006

Application of Inorganic Nitrogen Levels and Placements on the Growth and Yield of Wheat.

Fateh C. Oad, Sindh Agriculture University, H.# 68, Mir, Colony, Tandojam-70050, Hyderabad, Pakistan

The field experiment was laid down at Students Farm, Department of Agronomy, Sindh Agriculture University, Tandojam, Pakistan to assess the suitable nitrogen level and placements for the growth and yield characters of wheat. The three nitrogen levels (80, 120 and 150 kg N ha-1) were incorporated through broadcast, band application, pop-up and foliar application. In broadcast methods, the application was made as farmers practice. In band method the N from urea was applied in narrow single strips, 2 inches deep and 2 inches apart from rows. The fertilizer application through pop-up was made directly with the seed same as seed placed during drilling as first split and remaining two were incorporated during tillering and booting stages as broadcast on moist surface. Foliar feeding refers to spraying nutrient solution on the foliage. In this method, granular urea was dissolved with water and solution and split applied i.e., during 20 days of sowing, 30 days, tillering and booting stages. The results of the study showed that 120 kg N ha-1 applied through band application was better nitrogen level where taller plants, maximum tiller production, lengthy spikes, more grain number per spike, better seed index and higher grain yield. The other N placement methods i.e. broadcast, pop-up and foliar N feeding were at the second, third and fourth ranks, respectively. The application of higher nitrogen level (150 kg N ha-1) significantly prolonged the flowering and maturity days. It was concluded that 120 kg N ha-1 through band application exhibited better results for observed growth characters and grain yield of wheat, hence band application is recommended. KeyWords: Wheat, Nitrogen, Fertilizer, Placements, Growth, Yield, Flowering, Maturity, Grain, Height, Spikes, Seed-index.

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