Reprint - Central Arid Zone Research Institute

pediment plain where 40-60 per cent of the total area of village isaffected by strong wind erosion hazard. It is a characteristicallymono-cropping area with a land use intensity of only 10 to 20 percent. The third village Girab, located 64 km west of Sheo, lies in asandy undulating interdunal plain where 80 to 90 per cent of thetotal area of the village is affected by very severe wind erosion. it ismainly a sandy waste. The three villages selected for the samplestudy in Sheo tehsil will represent the regional characteristics ofdifferent aspects of drought hazards.4 Jagnnathan, P. (1963)Trends in the characteristics of a seasonal variation of temperaturein the arid and semi arid regions. Indian Journal of Meteorologyand Geophysics. 14: 3-22The mean annual temperatures do not show any systematic changebut there is a slight decrease of temperature through small atpractically all stations during periods of maximum solar activityover those of minimum solar activity. Annual ranges exhibitoscillatory tendency with a period of about 2 sun spot cycles. Thecomponents of the harmonic vectors of the annual oscillation doexhibit significant fluctuation though not in exact sympathy withthe fluctuation in sun spots. The biannual wave is significant at theIndian station in particular with amplitudes of the order of 2-3° Cand the maximum occurring in April and October.5 Krishnan, A. (1962)Heights of base of low clouds over India. Indian Journal ofMeteorology and Geophysics. 13: 31-38The normal percentage frequencies of occurrence of low clouds andtheir heights of bases of these low clouds are discussed.6 Krishnan, A. (1969)Some aspects of water management for crop production in arid andsemiarid zones of India. Annals of Arid Zone. 8: 1-17The paper deals with the rainfall distribution and temperaturepattern of arid and semi arid zones of India. This review alsoincludes on water management parameters like potential evapotranspiration,water deficiency, aridity indices for crop production inarid and semi-arid areas.7 Krishnan, A. (1977)Climatic changes relating to desertification in the arid zone of northwest India. Annals of Arid Zone. 16: 302-309