The crop water requirement of different agricultural and horticultural crops (16 crops) was assessed during different season's viz., kharif, rabi and summer for four successive years (2008-12) in farmers field conditions. The water utilized and water productivity of rice –rice and maize – vegetable cropping systems were studies at Wargal, Kothakunta sub -watershed, in Siddipet district, Telangana. The mean water used and water productivity of crops was estimated for kharif rice (13299 m3/ha and 0.457 kg m^-3), rabi rice (14298 m3/ha and 0.463 kg m^-3), maize (3472m3/ha and 1.607 kg m^-3), sweet corn (3378 m3/ha and 1.812 kg m^-3), cotton (5421m3/ha and 1.61 kg m^-3), sunflower (9209 m3/ha and 0.051 kg m^-3), tomato (drip irrigation) (5162  m3/ha and 1.544 kg m^-3), tomato (surface irrigation) (11665  m3/ha and 1.376 kg m^-3), bhendi (surface irrigation) (9302  m3/ha and 0.464 kg m^-3), green chillies (surface irrigation) (7597 m3/ha and 2.22 kg m^-3), French bean (surface irrigation) (kharif- 3704 m3/ha and 0.99 kg m^-3, rabi-2846 m3/ha and 0.94 kg m^-3 and summer- 4972  m3/ha and 0.887 kg m^-3), French bean (drip irrigation) (2626 m3/ha and 1.347 kg m^-3), French bean (after paddy) surface irrigation (2751 m3/ha and 2.456 kg m^-3), bush bean (surface irrigation) (6069 m3/ha and 0.62 kg m^-3), bush bean (drip) (6088 m3/ha and 1.005 kg m^-3), bush bean surface irrigation (after paddy field) (2404 m3/ha and 0.349 kg m^-3), vegetable cow pea (drip irrigation) rabi (9713  m3/ha and 0.696 kg m^-3), vegetable cow pea (drip irrigation) summer (4040m3/ha and 1.19 kg m^-3), ridge gourd (drip irrigation) (5334  m3/ha and 1.413 kg m^-3), cabbage (surface irrigation) (6802  m3/ha and 11.92 kg m^-3), ), cucumber ( (drip irrigation) (kharif-3304 m3/ha and 1.599 kg m^-3, rabi- 2241 m3/ha and 2.67 kg m^-3 and summer- 10048 m3/ha and 0.782 kg m^-3), onion (surface irrigation) (2136 m3/ha and 2.676 kg m^-3), potato (surface irrigation) (4386 m3/ha and 2.396 kg m^-3), potato (drip irrigation) (4621 m3/ha and 3.509 kg m^-3).The rice crop consumed a higher quantity of water than other crops. The cabbage cultivated during rabi 2009-10 under surface irrigation recorded the highest water productivity, while the lowest water productivity was recorded in sunflower during rabi 2011-12.Rice equivalent yield was worked out using prevailing crop market prices during 2009-12. Mean water productivity of different rice-rice and maize based cropping systems was found to be rice -rice (0.38 kg m^-3), maize -potato (0.76 kg m^-3), maize - tomato (0.86 kg m^-3), maize- fallow –French bean (0.89 kg m^-3), maize - vegetable cow pea (0.57 kg m^-3), maize- fallow –bush bean (1.33 kg m^-3) and maize - cabbage (2.31 kg m^-3). The water productivity of maize – vegetable cropping system was three times higher than that of rice – rice cropping system. Therefore, from the present study maize – vegetable cropping system was found to be the most viable cropping system under Wargal, Kothakunta sub -watershed for conservation of available water resources.

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