Leaf area is considered as a basic factor in plant physiology.Working on barley.Lal and Rao(1950)observed that leaf area can be used as an index of crop growth and that it related to physiological and economic characters such as dry matter accumulation.carbohydrate metabolism,yield and quality of fruits.Photosyn- thesis which is responsible for growth and grain development takes place in green leaves.Thus it is imperative that leaf area,photosynthesis and grain yield are interlinked.An attempt was yield are unterlinked.An attempt was there fore made to know as to how leaf area was affected by such factors as varieties.nitrogen and growth stages.
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