S. Koala

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Co-Authors

Charles Bielders

UCLouvain

O. Eyog-Matig

International Institute of Tropical Agriculture

Jean‐Louis Rajot

Université Paris Cité

Abdourahmane Tamba

K.E. Giller

Wageningen University & Research

Job Kihara

International Center for Tropical Agriculture

Isaac Savini

International Center for Tropical Agriculture

K. E. Dashiell

International Institute of Tropical Agriculture

Abdoulaye Soumaré

Ziguinchor University

J.R. Sims

Los Alamos National Laboratory

Cooperative Institutions

International Center for Tropical Agriculture

World Agroforestry Centre

International Institute of Tropical Agriculture

Wageningen University & Research

International Centre of Insect Physiology and Ecology

International Center for Tropical Agriculture

University of Zimbabwe

Alliance Bioversity International - CIAT

Bioversity International

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Effects of N and P fertilizers on the growth, nodulation and N 2-fixation of fababean (Vicia faba L.), green pea (Pisum sativum L.) and dry bean (Phaseoulus vulgaris L.)

S. Koala

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Wind Erosion Research in Niger: The Experience of ICRISAT and Advanced Research Organizations

Charles Bielders Jean‐Louis Rajot S. Koala

In the Sahelian zone of Niger, wind erosion constitutes one, of the major causes of land degradation. This results from low vegetation cover at a time when the most erosive winds are blowing in combination with sandy; easily erodible soils. Through their effect on soil cover, overgrazing by cattle and the rapid expansion of agricultural land have further enhanced the impact of wind erosion on the Sahelian agro-ecosystem. Wind-erosion-induced damage includes direct damage to crops through sandblasting, seedling burial following sand deposition, and topsoil loss...

Overgrazing

Topsoil

Deposition

Land Cover

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Citations (6)

Dry bean potential in Montana dryland cropping systems

J.R. Sims S. Koala

Dry bean

Cropping system

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The Desert Margins Program: elements of agro-biodiversity conservation and use in the desert margins of sub-Saharan Africa.

Ramadjita Tabo S. Koala H. K. Cheruiyot M. Gandah Abdoulaye Soumaré

Desert (philosophy)

Margin (machine learning)

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Extent and Severity of Wind Erosion in West and Central Africa

S. Koala Charles Bielders

The West African Sahel (WAS) is the transition zone between the Sahara desert in the north of Africa and the more humid Sudanian zones in the south. Although diverse in many ways, the WAS countries have in common a fragile agricultural sector, brought about by poor soil, limited rainfall, frequent drought, and wind erosion that accelerates soil degradation and desertification, compounded by rapidly' growing populations. Erosive winds 'occur during two distinct seasons. During the dry season (October- April) the region is invaded by strong northeasterly winds, known as harmattan, resulting in moderate wind erosion. The second and most important wind-erosion period is the early rainy season (May-July), when rainfall comes with heavy thunderstorms . that move westward through the Sahel. Wind erosion can be controlled by soil cover, such as a mulch of crop residue, soil roughening, and the reduction of wind speed by annual or perennial grass barriers, artificial barriers, strip cropping, and windbreaks. Based on the strong relationship between the incidence of wind erosion and soil properties, it may be possible to map the incidence of potential wind erosion in the West African Sahel, and hence tell farmers where ameliorative measures can be used to best advantage.

Desertification

Windbreak

Wet season

Prevailing winds

Dominance (genetics)

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Desertification: Myths and Realities

Routledge eBooks (2018)

O. B. Smith S. Koala

This chapter presents an overview of the issues, with the goal of identifying and contrasting the myths and realities, because some of the former have the potential to confuse issues and negatively impact on policy decisions, actions and approaches required to effectively tackle the problem. An intense debate over the desertification phenomenon has been raging for well over two decades, since the advent of the Sahelian drought in the early 1970s. The process of desertification is not one of advancing deserts but usually starts in small areas or pockets of land where due to a number of factors, the vegetative cover is reduced to the extent of exposing the soil to erosion. The claim that desertification is a southern problem with only on-site and no significant off-site impact needs to be re-examined in the light of evidence of transcontinental dust travel.

Desertification

10.4324/9781315192963-9

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Desert Margins Programme (DMP) Centre File: 003347 (Kenya Component)

Desert Margins Programme Team Ben Dr.Chikamai S. Koala

Component (thermodynamics)

Desert (philosophy)

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Implementation Plan for collaboration between N2Africa and the Soil Health and Market Access Programs of the Alliance for a Green Revolution in Africa (AGRA) plan