EFFECT OF NITROGEN RATES, MULCHING AND ANTITRANSPIRANTS ON WATER-USE AND WATER-USE EFFICIENCY OF BARLEY (HORDEUM-VULGARE-L) VARIETIES GROWN UNDER DRYLAND CONDITIONS

Field experiments were made under natural rainfall during the winter seasons of 1972-3 and 1973-4 at the Indian Agricultural Research Institute, New Delhi, to study the soil water use by barley varieties as influenced by nitrogen rates, mulching and foliar application of antitranspirants. Both Ratna and Vijaya varieties of barley had similar efficiency of water use.Total water use was not much different for various treatments but straw mulch and kaolin decreased evapotranspiration at tillering and pre-flowering stages enabling the plants to use more water at critical stages of grain formation. Application of nitrogen, straw mulch and a foliar coating of kaolin increased the efficiency of water use. © 1979, Cambridge University Press. All rights reserved.