الفهرس 
The role of nitrogen in plantOnly 14 pages are availabe for public view
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Abstract
This work was carried out on borad bean (Vicia faba L.), Acoadolus variety at Nubaria Agrioultural Researcn Station during the winter seasons of 1980/81 and 1981/82. The main objective of this research was to study the effect or seven NPK ratios at three levels on growth analysis, growth attributes, yield and yield components and chemical
composition of leaf tissues and seeds. Seven ratios of 1:2:0, 1.2:1, 1:2\2, 1.2’3, 1’3:1, 1:3:2 and 1.3:3 at three fertilizer levels of 50,100 and 150 kg NPK/feddan were used. The experiments were designed
in a completely randomized block with four replications. The area of each experimental plot was 16.2 square meters.