Combining permanent beds and residue retention with nitrogen fertilization improves crop yields and water productivity in irrigated arid lands under cotton, wheat and maize - Devkota, M.; Martius, C.; Lamers, John P.A.; Sayre, K.D.; Devkota, Krishna Prasad; Gupta, R.K.; Egamberdiev, O; Vlek, Paul L.G. (Elsevier, 2013)