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

10. Flood-tolerant crops for low-input sustainable agriculture in the everglades agricultural area.

J. of Sust. Agriculture, 2, (1), 1991, pp. 77-99

The objective of this paper is to describe potential crops for production in reflooded wetlands and present yield and resource use data (water, nitrogen, and phosphorus). The crops in the study include a tuber (taro, Colocasia esculenta), three grasses (alemangrass,

Echinochloa polystachia, flood tolerant sugarcane, Saccharum sp., and rice, Oryza sativa).

Wetlands have traditionally been viewed as wastelands; now vast areas of such lands have been converted to agricultural production worldwide.

This has often been done in the past without regard for potential environmental consequences or long term sustainability of agricultural production. Recently, wetlands have become appreciated for, among other things, their role in environmental quality and stability. This greater appreciation for wetlands, combined with extensive wetlands loss, has recently led to concerted efforts to protect these areas and, in some cases, has led to confrontations with agricultural interests.

Wetlands are often highly fertile when initially drained. This is the result of rapid oxidation of a soil which had accumulated in a flooded environment. During this oxidation process, nutrients which had accumulated in the soil organic matter over an extended period of time are released to the soil solution at a high rate. Eventually, the stocks of nutrients and soil organic matter are depleted, leading to poor native soil fertility, low agricultural production, and in some cases, abandonment of the now depleted wetland.

Studies of wetland cropping systems have been conducted at the Everglades Research and Education Center (EREC).

The crops in this study vary widely in yield and nutrient uptake. Rice, for example, thrives in water with very low phosphorus contents.

Alemangrass is a tremendous phosphorus sink, but may require supplemental phosphorus fertilization. Crops which thrive in oligotrophic conditions, as well as those which require large amounts of nutrients, are useful in water quality management. For example, alemangrass could be effective in reducing the phosphorus content of drainage from fields previously cultivated with crops which leave behind a large amount of fertilizer phosphorus, as do some vegetables. Rice can further reduce phosphorus contents to levels found under natural conditions. In addition, operating costs in a flood-tolerant cropping system may be lower for flooded crops because periodic flooding aids in the control of some pests and weeds.

Results from this study pertaining to crop management, water and nutrient budgets are encouraging. More information is neded about soil formation and nutrient dynamics in a flood-tolerant system. For example, the balance between soil formation and soil loss for the crops in this study is not well understood. A desirable feature of flood-tolerant crops may be a reduction in nitrogen and phosphorus fertilization over that required by upland crops, however, nutrient mineralization rates and availability to crops when fields are flooded for long periods of time are not well understood in the EAA either.

Economic viability is a complex topic as well.

Currently, upland crops are profitable to the extent that it is not economically sensible to make meaningful investments in soil conservation.

Successful expansion of wetland agriculture in the EAA imlies reversal of soil loss, reduction of nutrient levels in drainage, compatibility with natural hydrologic cycles, and economic viability. Long term sustainability has been experienced in similar systems in other parts of the world. For example, it has been reported that aquatic crops have been grown for more than 400 years in the same organic soil without fertilization in Malaysia.

The development in the Everglades Agricultural Area (EAA) of sustainable agriculture in a former wetland can serve as a model for the many countries which have undertaken or contemplated wetland conversion.

Indonesia, for example, is draining parts of 27 million ha of organic soils, much of it along coastal areas.

1100 92 - 4/143

Cropping systems

Review, book, tropics, crop production, environmental factors, plant population density, crop productivity, physiological process, CAB, ODA

SQUIRE, G.R.

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