File Name: distribution and extent of salt affected soils in ethiopia lecture notes .zip
Metrics details. Characterizing and describing soils and land use and make a suggestion for sustainable utilization of land resources in the Ethiopian Rift valley flat plain areas of Lake Chamo Sub-Basin CSB are essential. To 1 characterize soils of experimental area according to World Reference Base Legend and assess the nature and extent of salinity problems; 2 characterize land use systems and their role in soil properties; and 3 identify best land use practices used for both environmental management and improve agricultural productivity.
- Soil Degradation
- Mapping abiotic stresses for rice in Africa: Drought, cold, iron toxicity, salinity and sodicity
- National collection summaries
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management.
Maps of abiotic stresses for rice can be useful for 1 prioritizing research and 2 identifying stress hotspots, for directing technologies and varieties to those areas where they are most needed. Large-scale maps of stresses are not available for Africa. Maps showing hotspots of the stresses, the countries most affected and total potentially affected area are presented.
The salinity of soil refers to the amount of salts in the soil and it can be estimated by measuring the electrical conductivity EC of an extracted soil solution. Try Our Software Now. Since salts move with the wetting front, the salts accumulate in specific profiles according to the irrigation regimen and the type of irrigation used.
When using drip irrigation — there is also a lateral movement of water and salts. We regularly update our database of articles, and also work on the quality of materials. Leave your email and always receive new articles in our weekly newsletter. Be the first to know, don't miss the important! Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website.
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Please enter your email and you will receive the latest news from us! Thank you for your subscription. Soil Salinity Smart Fertilizer. High salts concentration results in high osmotic potential of the soil solution, so the plant has to use more energy to absorb water. Under extreme salinity conditions, plants may be unable to absorb water and will wilt, even when the surrounding soil is saturated. Ion-specific toxicity. When a plant absorbs water containing ions of harmful salts e.
Sodium, Chloride, excess of Boron etc. An imbalance in the salts content may result in a competition between elements. For example, excess of chloride reduces the uptake of nitrate, excess of phosphorus reduces the uptake of manganese, and excess of potassium limits the uptake of calcium. Sodium effect on soil structure. In saline soils, sodium replaces calcium and magnesium, which are adsorbed to the surface of clay particles in the soil.
Thus, aggregation of soil particles is reduced, and the soil will tend to disperse. When wet, a sodic soil tends to seal, its permeability is dramatically reduced, and thus water infiltration capacity is reduced as well. When dry, a sodic soil becomes hard has the tendency to crack. This may result in damages to roots.
It should be noted that salinity by itself actually improves soil structure and eliminates to some degree the negative effect of sodium ions, but of course, salinity cannot be increased without affecting plants growth. Do you want to read the whole article?
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Mapping abiotic stresses for rice in Africa: Drought, cold, iron toxicity, salinity and sodicity
National collection summaries
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water management. Perspectives are like filters: they compile and structure the information that relate to a given focus theme, region or context. This allows you to quickly navigate to the content of your particular interest while promoting the holistic understanding of sustainable sanitation and water management.
Skip to main content. Search form Search. Soils of india pdf. I want to thank our former social studies teacher Mr.
To aid researchers and other interested parties gain a full understanding of the holdings, a select number of country-specific reviews of WOSSAC materials have been produced. Each provides a short summary review of the key stages in the development in that country's national land and soil resource survey, linked to the holdings in the WOSSAC archive catalogue. Further to this, all the materials held for these countries have now also been, or are being, captured electronically, in map and report catalogue pdf form for download.