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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.
van Ittersum, M K and van Bussel, L G J and Wolf, J and Grassini, P and van Wart, J and Guilpart, N and Claessens, L and de Groot, H and Wiebe, K and Mason-D’Croz, D and Yang, H and Boogaard, H and van Oort, P A J and van Loon, M P and Saito, K and Adimo, O and Adjei-Nsiah, S and Agali, A and Bala, A and Chikowo, R and Kaizzi, K and Kouressy, M and Makoi, J H J R and Ouattara, K and Tesfaye, K and Cassman, K G (2016) Can sub-Saharan Africa feed itself? Proceedings of the National Academy of Sciences, 113 (52). pp. 14964-14969. ISSN 0027-8424