1. Chan YK (1971) The transfer of nitrogen from legumes to grass in legume grass association. Dissertation Abstracts International B 32, 1475?1476
2. De R (1979) Role of legumes in intercropping systems. In. Proceedings FAO/IAEA advisory group meeting on nuclear techniques in development of fertilizer and water management practices for different cropping systems. Ankara, Turkey. 8?10 Oct.
3. De R, Gupta RS, Singh RP, Pal M, Singh SN, Sharma RN and Kaushik SK (1978) Interplanting maize, sorghum and pearlmillet with short duration grain legumes. Indian J Agric Sci 48(3), 132?140
4. Donald CM (1963) Competition among crop and pasture plants. Adv Agron 15, 1?118
5. Eaglesham ARJ (1979) Fertilizer use efficiency studies in intercropping system using Nitrogen-15. In. Proceedings FAO/IAEA advisory group meeting on nuclear techniques in development of fertilizer and water management practices for different cropping systems. Ankara, Turkey. 8?12 Oct.