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Farm level water footprints of rice production based on measured and estimated crop evapo-transpiration.

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Title Farm level water footprints of rice production based on measured and estimated crop evapo-transpiration.
Not Available
 
Creator Kar, G., Kumar, A., Sahoo, N. and Singh, R.
 
Subject Water footprints, Water productivity, Rice, Crop evapo-transpiration.
 
Description Not Available
Studies have been conducted to quantify water footprint (WF) on high spatial scale in which crop
evapo-transpiration (ETc) was computed indirectly using empirical formula. In this study attempt has
been made to quantify field level W F of rice production (varieties: ‘Lalat’ and ‘Gayatri’) in eastern India
based on measured ETc. The measured values were compared with other 3 methods like Pan
Evaporimeter, Bowen ratio and Penman Monteith methods. Based on measured field water balance
study, 562 and 688 mm of ETc were recorded for ‘Lalat’ and ‘Gayatri’ varieties, respectively and water
footprints of 2470 and 2704 m3
t-1 were computed in these two respective varieties when no nitrogen was
applied. But WFs of 1316 and 1394 m3
t-1 were recorded under 150 kg N ha-1 in these two respective
varieties. Thus it can be concluded that W F of a crop to a large extent was influenced by agricultural
management adopted. Among different methods, the pan-evaporimeter method estimated ETc
values
very close to the measured one, whereas, Bowen Ratio and Penman-Monteith methods overestimated
ETc
values by 11-12 percent.
Not Available
 
Date 2018-12-01T04:18:28Z
2018-12-01T04:18:28Z
2014-12
 
Type Research Paper
 
Identifier Kar, G., Kumar, A., Sahoo, N. and Singh, R. 2014. Farm level water footprints of rice production based on measured and estimated crop evapo-transpiration. Journal of Agro-meteorology 16(2): 157-163
0972-1665
http://krishi.icar.gov.in/jspui/handle/123456789/14703
 
Language English
 
Relation Not Available;
 
Publisher Agrometeorologists