7Siri-Udompas C,Morris R A.Effects of crop proportion on intercropped upland rice and cowpea 2.Nitrogen yields[J].Field Crops Research,1990,25(3):233-246.
8Morris R A,Siri-Udompas C,Centeno H S.Effects of crop proportion on intercropped upland rice and cowpea 1.Grain yields[J].Field Crops Research,1990,24(1):33-49.
9Torres R O,Pareek R P,Ladha J K,et al.Stem-nodulating legumes as relay-cropped or intercropped green manures for lowland rice[J].Field Crops Research,1995,42(1):39-47.
10Yadav R L.Enhancing efficiency of fertilizer N use in rice-wheat systems of Indo-Gangetic Plains by intercropping Sesbania aculeata in direct seeded upland rice for green manuring[J].Bioresource Technology,2004,93(2):213-215.
