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Monday, February 3, 2020 | History

2 edition of Using and sustaining Africa"s soils found in the catalog.

Using and sustaining Africa"s soils

R. A. Yates

Using and sustaining Africa"s soils

Summary of the proceedings of a seminar held in Washington, D.C. in January 1992..

by R. A. Yates

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  • 7 Currently reading

Published by IBRD in Washington, D.C .
Written in English


Edition Notes

SeriesIBRD Africa Region Agriculture and Rural Development Series -- 6.
ContributionsKiss, A., World Bank.
The Physical Object
Paginationiii,36p.p.
Number of Pages36
ID Numbers
Open LibraryOL17215087M

A combination of steel and vanadium is used to produce crankshafts, piston rods, axles, and armor plates. South Africa produces about 4. They link soil quality to the four sustainability objectives of Lourance -- agronomic, ecological, micro- and macro-economic sustainability. A large portion of the people are on the desert margins of the Sahara and Kalahari regions and along the larger rivers that traverse the areas, such as the Nile and the Okavango Delta.

The quality of these soils may be an inherent property of the land or may be due to human-induced degradation over long periods of time Oldeman et al. This is necessary because the Suborder and Great Group categories of Soil Taxonomy include soil climate information. FAO, Rome. The potential of soils to fix phosphorous is difficult to estimate. A similar feature is seen in the Alfisols, which occupy about This distribution of Oxisols is evident in figure 2 where, in the south, the tongue of Psamments is seen invading the zone of Oxisols with a large area on the west in Angola and the remaining on the eastern part of the tongue in Zaire.

Lime and organic matter should be added to get a good yield for longer periods. Beijing, People's Republic of China. These are some of the priority areas for technical assistance and the implementation of appropriate soil management technologies. This study suggests that tillage management can have beneficial effects on both grain yield and nutritional quality. Virmani, S.


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Using and sustaining Africa"s soils by R. A. Yates Download PDF Ebook

Many transfers fail because they are not attuned to the socioeconomic conditions of the farmer and the biophysical attributes of the farm. Changes in the fertility status of South African soils. Enhancing effective land area by increasing cropping intensities instead of increasing land area under cultivation is an important policy consideration.

Closely related to the Oxisols are the Ultisols occupying about 6.

South African Journal of Science

Using and sustaining Africas soils book, knowledge of paleoecologypalaeogeographyglacial geology and paleoclimatology is important for the recognition and understanding of soil genesis Using and sustaining Africas soils book constitute a basis for predicting future soil changes.

These decisions must consider the social, economic, and political structure of the country as well as the conditions of the natural resources. This is a crude estimate of P in soils and a refined evaluation would require determination of the activity of P in the soil.

There are very few old soils in a geological sense because they can be destroyed or buried by geological events, or modified by shifts in climate by virtue of their vulnerable position at the surface of the earth.

Spatial pattern and variability of soils in a granite landscape, north-east of Nelspruit. Soil management is important, both directly and indirectly, to crop productivity, environmental sustainability, and human health.

Soil spectroscopy: an opportunity to be seized. Soil Sci. Wenstedt, F. Trees store water, raise water from underlying aquifers, reduce evaporation after a rain, attract animals and thereby fertility through fecesand they can cause more rain to fall by temperature reduction and other effectsif the planted area is large enough.

They saw it as medium whose chemical, physical and biological properties were useful for the services of agronomic productivity. These maps depict areas which are thought to be most responsive to development and areas which will require different kinds of mitigating technologies to reduce degradation and enhance sustainability.

World Climatic Data. China Science and Technology Press. Madagascar has a very large extent of Oxisols on the eastern piedmonts and much of the central highlands. Organic matter, pH and nutrient distribution in soil layers of a savanna Thornveld subjected to different burning frequencies at Alice in the Eastern Cape.

Soil resilience and sustainable land management in the context of Agenda Tavernier, R. New Delhi, India. Most of the soils are reworked and some have stone-lines composed of quartz or petroplinthic gravel Ruhe, About 9 million km2 of land with these qualities, support about million people.

The properties incorporated in the soil name are empirically related to crop performance and a judgment is made on the potential of the soil for sustaining agriculture.

African Soil Types

The country supplies diamonds to established jewelry shops in various parts of the world including New York. In Press. A more detailed GIS analysis than the one attempted here, will provide details of areas with multiple stresses.

High speed winds blow soil from the desert, depositing some on neighboring fertile lands, and causing shifting sand dunes Using and sustaining Africas soils book the desert, which buries fences and blocks roads and railway tracks. It is being realized by African agriculture that high yielding cultivars alone is not the path to sustainability; research and development must be holistic and structured on expected risk levels and based on criteria such as those in table 6.

These kinds of maps, or more detailed maps of Using and sustaining Africas soils book and countries, have important applications in designing research and developmental strategies when combined with the socioeconomic characteristics of the people living on these lands.

The mesic STRs are confined to small areas on the Atlas mountains in North Africa and the delineations are too small to be shown on the map in Fig. Thus for most practical purposes, about half of Africa has land unsuitable for low-input agriculture.

Spatial pattern and variability of soil and hillslope properties in a granitic landscape.Aug 02,  · Sub-Saharan Africa (SSA) has over 50% of the world’s potential land for cultivation, yet only a small portion of this land satisfies conditions for agricultural production from cropping (Lal ; Jayne et al.

).Although the proportion of arable land in SSA has been steadily growing since ’s, currently only 9% of SSA is arable land and only 1% is permanently cultivated Footnote magicechomusic.com by: Soil Classification: A Taxonomic System for South Africa Soil Classification Working Group (South Africa), C.

N. Macvicar Department of Agricultural Development, - Soils - pages. management zones using automated cluster analysis. At the end, we analyze whether the produced predic-tions of soil nutrients (maps) are correlated with field-measured crop yields based on field trials.

Materials and methods Soil nutrient samples As input data, we used a compilation of georeferenced soil samples (ca 59, unique locations Cited by: Soils of South Africa is the first book in seventy years that provides a comprehensive pdf of South African soils.

Pdf book arranges more than seventy soil forms into fourteen groups and then provides, for each group: • maps showing their distribution and abundance throughout South Africa • descriptions of morphological, chemical and physical properties • a detailed account of Cited by: Soils of South Africa is the first book download pdf seventy years that provides a comprehensive account of South African soils.

soil testing Companies in South Africa

The book arranges more than seventy soil forms into fourteen groups and then provides, for each group: • maps showing their distribution and abundance throughout South Africa • descriptions of morphological, chemical and physical properties • a detailed account of Reviews: 1.Indigenous soil and water conservation practices are rarely acknowledged in the design ebook conventional development projects.

Instead, the history of soil and water conservation in Africa has been one of imposing external solutions without regard for local practice.