The impact of imperfect drainage in soils on agricultural production system under surface irrigation was studied in Ukai-Kakrapar Right Bank (UKRB) and Mahi Right Bank (MRB) canal command area of Gujarat State.The study was based on the data collected from 400 and 500 farmers spread over different land irrigability classes in UKRB and MRB, respectively. It was observed that suggested cropping pattern under different land irrigability classes was violated by the farmers by adopting high water requirement crops like sugarcane, rice, banana etc. especially in land irrigability classes III, IV and V which are prone to salinity and waterlogging due to imperfect to very poor internal drainage. Any diversification from the recommended cropping pattern based on soil-water-plant relationship leads to development of salinity and waterlogging which ultimately reduced the farm production, profitability  and income and increased the unit cost of production of the crop. The adaptation of high water requirement crops leads to low efficiency of irrigation potential created. The Study further indicated inverse relationship between crop productivity and land irrigability and soil degradation levels. For higher returns and minimum degradation, irrigation projects should be developed only for land irrigability class I and II where the internal drainage system is perfect.