Nutrient Deficiencies in Barley

摘要

Deficient plants are stunted with thin stems and pale green foliage. Affected plants lack vigour and produce small heads with few grains. In acutely deficient conditions many young tillers fail to develop heads and die before maturity.Nitrogen is mobile in plants and under conditions of low soil supply it is easily mobilised from older to younger leaves.The deficiency symptoms appear first, and become more severe, on older leaves. The younger leaves remain green and appear healthy (Plate 1).