1. Abrol IP (1999) Sustaining rice-wheat system productivity in the Indo-Gangetic plains: water management-related issues. Agric Water Manag 40:31–35
2. Ahlawat IPS, Ali M, Yadav RL, Rao JDVK, Rego TJ, Singh RP (1998) Biological nitrogen fixation and residual effect of summer and rainy season grain legumes in rice and wheat cropping systems of the Indo-Gangetic Plain. In: JDVK KR, Johnsen C, Rego TJ (eds) Residual effects of legumes in rice and wheat cropping systems of the Indo-Gangetic Plain. International crop research institute for the semi-arid tropics, Patancheru, Andhra Pradesh, India. Oxford & IBH Publishing, New Delhi
3. Aulakh MS, Manchanda JS, Garg AK, Kumar S, Dercon G, Nguyen M-L (2012) Crop production and nutrient use efficiency of conservation agriculture for soybean–wheat rotation in the Indo-Gangetic Plains of Northwestern India. Soil Tillage Res 120:50–60
4. Bahadur L, Tiwari DD, Mishra J, Gupta BR (2013) Nutrient management in rice-wheat sequence under sodic soil. J Indian Soc Soil Sci 61(4):341–346
5. Balasubramanian V, Ladha JK, Gupta RK, Naresh RK, Mehla RS, Singh Y, Song B (2003) Technology options for rice in rice-wheat systems in Asia. ASA, Special Publication No. 65. ASA, CSSA, SSSA, Madison, pp 115–172