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Agrawal, P K and Hebbar, K B and Venugopalan, M V and Rani, S and Bala, A and Biswal, A and Wani, S P (2008) Quantification of Yield Gaps in Rain-fed Rice, Wheat, Cotton and Mustard in India: Global Theme on Agroecosystems Report no. 43. Monograph. International Crops Research Institute for the Semi-Arid Tropics , Patancheru, Andhra Pradesh, India.
Hebbar, K B and Sashidhar, V R and Udayakumar, M and Devendra, R and Nageswara Rao, R C (1994) A comparative assessment of water use efficiency in groundnut (Arachis hypogaea) grown in containers and in the field under water-limited conditions. Journal of Agricultural Science, 122 (3). pp. 429-434. ISSN 1469-5146