Constant discharge pumping test-data in selected hydrological formation in Udaipur were analyzed by different methods for estimation of aquifer parameters. Results revealed that in Phyllite formation, Boultan and Streltsova (1976) followed by Modified Papadopulos and Cooper, Sen (1986) method, in quartzite formation modified Papadopulos and Cooper method followed by Sen (1986) method and in carboneous formation, Boultan and Streltsova (1976) and Papadopulos and Cooper (1967) method gave the least root mean square error . Variation in estimated values of T&S by Papadopulos and Cooper (1967) method and modified Papadopulos and Cooper (1967) method ranged from 9.8 to 13.21 % and 6.71 to 42.26 % respectively. Variation in aquifer parameters was observed with decreased depth of water level in the wells.

The present study was carried out to analyze the growth and instability in area, production and productivity of chilli and acreage response to chilli crop in arid zone of Rajasthan. The study was confined to five districts of arid zone having more than 500 ha area under chilli cultivation during last decade. The data were collected for the period 1960-2007 and analyzed by using exponential production function and instability index. The results revealed that area and production have increased in the arid zone of Rajasthan but with high instability. The productivity registered lower but relatively more stable growth compared to area and production which indicates that chilli production can be increased by stabilizing and sustained increase in area under chilli cultivation by efficient use of irrigation water. The farmers of the arid zone of Rajasthan tend to divert more area towards cash crop if current irrigation facilities are adequate.