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close this bookAbstracts on Sustainable Agriculture (GTZ; 1992; 423 pages)
Open this folder and view contentsAbstracts On Traditional Land-Use Systems
Open this folder and view contentsAbstracts on farming systems research and development
Open this folder and view contentsAbstracts on integrated systems
close this folderAbstracts on cropping system
View the documentAcknowledgements
View the document1. Green manure crops in irrigated and rainfed lowland rice-based cropping systems in south Asia.
View the document2. Comparative evaluation of some inter-cropping systems in the humid tropics of southern nigeria.
View the document3. Intercropping improves land-use efficiency.
View the document4. A new maize modernizes savanna farming.
View the document5. Analysis of the environmental component of genotype x environment interaction in crop adaptation evaluation.
View the document6. Climatic analyses and cropping systems in the semiarid tropics.
View the document7. Field crop production in tropical Africa.
View the document8. The cultivated plants of the tropics and subtropics.
View the document9. Software system for plant growth prediction.
View the document10. Flood-tolerant crops for low-input sustainable agriculture in the everglades agricultural area.
View the document11. The physiology of tropical production.
View the document12. Achieving sustainability in cropping systems: the labour requirements of a mulch rotation system in Kalimantan, Indonesia.
View the document13. Grain yield responses in rice to eight tropical green manures.
View the document14. Utilization efficiency of applied nitrogen as related to yield advantage in maize/mungbean intercropping.
View the document15. Effects of two underseed species, medicago polymorpha l. And scorpiurus muricatus l.,on the yield of main crop (durum wheat) and subsequent crop (teff) under humid moisture regimes in Ethiopia.
View the document16. Characterization and environment-management relationships in beans and sorghum intercropped with maize in honduras. (caracterizacion y relaciones ambiente-manejo en sistemas de frijol y sorgo asociados con maiz en Honduras.)
View the document17. Production potential of pigeonpea/pearl millet intercropping system in rainfed diara (floodprone) areas of eastern uttar pradesh, India.
View the document18. Effect of mixed cropping lentil with barley at different seeding rates.
View the document19. Yield performance and complementarity in mixtures of bread wheat (triticum aestivum l.) And pea (pisum sativum l.).
View the document20. Economic feasibility of green manure in rice-based cropping systems.
View the document21. Effect of nitrogen on pigeonpea (cajanus cajan) and rice (oryza sativa) intercropping system.
View the document22. Smallholder cotton cropping practices in Togo.
View the document23. Effect of row arrangement on yield and yield advantages in sorghum/finger millet intercrops.
View the document24. Yield, economics and nutrient balance in cropping systems based on rice (oriza sativa).
View the document25. Mechanisms for overyielding in a sunflower/mustard intercrop.
View the document26. Agronomic modification of competition between cassava and pigeonpea in intercropping.
View the document27. Production and economic evaluation of white guinea yam (dioscorea rotundata) minisetts under ridge and bed production systems in a tropical guinea savanna location, Nigeria.
View the document28. Evaluation of intercropping cassava/corn/beans (phaseolus vulgaris l.) In northeast Brazil.
View the document29. Intercropping of sweet potato and legumes.
View the document30. Cassava in shifting cultivation. - a system approach to agricultural technology development in Africa.-
View the document31. Economic returns from yam/maize intercrops with various stake densities in a high-rainfall area.
View the document32. Performance of three centrosema spp. And pueraria phaseoloides in grazed associations with andropogon gayanus in the eastern plains of Colombia.
View the document33. Barley, lentil, and flax yield under different intercropping systems.
View the document34. Biological potential and economic feasibility of intercropping oilseeds and pulses with safflower (carthamus tinctorius) in drylands.
View the document35. Screening of different tropical legumes in monoculture and in association with cassava for adaption to acid infertile and high al-content soil.
View the document36. Intercropping studies in peanut (arachis hypogaea l.).
View the document37. Intercropping of rainfed groundnut (arachis hypogaea) with annual oilseed crops under different planting patterns.
View the document38. Resource use and plant interactions in a rice-mungbean intercrop.
View the document39. Cassava/legume intercropping with contrasting cassava cultivars. Part I
View the document40. Cassava/legume intercropping with contrasting cassava cultivars. Part II
View the document41. A post-green revolution strategy for the improvement of small farmer-grown common beans.
Open this folder and view contentsAbstracts on agroecology
Open this folder and view contentsAbstracts on agrometeorology
Open this folder and view contentsAbstracts on agroforestry
Open this folder and view contentsAbstracts on homegardens
Open this folder and view contentsAbstracts on seed production
Open this folder and view contentsAbstracts on plant protection
Open this folder and view contentsAbstracts on water management
Open this folder and view contentsAbstracts on soil fertility
Open this folder and view contentsAbstracts on erosion and desertification control
Open this folder and view contentsAbstracts on potential crops for marginal lands
 

13. Grain yield responses in rice to eight tropical green manures.

Trop. Agric. (Trinidad), 69, 2, 1992, pp. 133-136

This study was undertaken to compare eight green manure legume species for biomass production, N accumulation and as substitutes for fertilizer

N in rice.

Crop residues and organic manures are common sources of humus and soil N. During the past few decades, organic manures were abandoned in favour of inorganic fertilizers that came with modern varieties of rice, maize (Zea mays L.) and wheat (Triticum aestivum L.), but owing to fertilizer input cost and concern for sustainable agriculture, interest in organic manures has been renewed. Farmyard manure, compost and green manure are commonly used organic manures, but farmyard manure and compost are limited in supply and generally low in nutrient content. Hence, re-examination of legume crops as a source of organic matter and N for rice is justified.

The treatments were arranged in strip plots with strips of green manures in one direction and N levels in the other. Eight green manure species were grown: dhaincha (Sesbania cannabina (Retz) Poir.); sunhemp (Crotolaria juncea L.); soybean (Glycine max (L.) Merrill); lablab (Lablab purpureus (L.) Sweet); indigo (Indigofera tinctoria L.); pigeonpea (Cajanus cajan (L.) Millsp.); cowpea (Vigna unguiculata (L.) Walp.); and mungbean (Vigna radiata (L.) Wilczek).

No fertilizer was applied to the green manures.

The green manures were incorporated in situ 60 DE by a tractor-mounted rototiller and by a power tiller-drawn mouldboard plough in 1985.

The above-ground biomass of Sesbania cannabina accumulated mean maximum N (84-199 kg ha-1) and indigo accumulated the least N (8-84 kg ha-1) in 30-60 days. Mungbean and cowpea, which produced grain and crop residue, are potential dual-purpose grain and green manure species. Regardless of species, mean rice grain yield from green manures was 4.0 t ha-1 in 1984 and 4.6 t ha-1 in 1985, comparable with 4.1 t ha-1 from 50 kg fertilizer N in 1984 and 4.7 t ha-1 from 105 kg fertilizer N ha-1 in 1985. In both years, 50-day Sesbania and Crotolaria acumulated N in excess of the rice crop requirement. Residual effects from green manures on dry season (DS) rice were not significant in 1984 but were significant from Sesbania green manure in 1985. Soil organic C and total N were also significantly higher after Sesbania and Crotolaria than after other green manures or fertilizer N treatments.

1103 92 - 4/146

Cropping systems

Asia, Philippines, study, field trials, intercropping, maize, mungbean,nitrogen,utilization efficiency, inoculation, land equivalent ratio

CHOWDHURY, M.K. and E.L. ROSARIO

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