The Lesson of Drente's “Essen”: Soil Nutrient Depletion in sub-Saharan Africa and Management Strategies for Soil Replenishment

2008 ◽  
pp. 145-166
Author(s):  
Henk Breman ◽  
Bidjokazo Fofana ◽  
Abdoulaye Mando
Keyword(s):  
Management Strategies ◽  
Soil Nutrient ◽  
Sub Saharan Africa ◽  
Nutrient Depletion ◽  
Soil Nutrient Depletion ◽  
Sub Saharan

Population density, soil nutrient depletion, and economic growth in sub-Saharan Africa

2001 ◽  
Vol 38 (2) ◽  
pp. 251-258 ◽  
Author(s):  
Pay Drechsel ◽  
Lucy Gyiele ◽  
Dagmar Kunze ◽  
Olufunke Cofie
Keyword(s):  
Economic Growth ◽  
Population Density ◽  
Soil Nutrient ◽  
Sub Saharan Africa ◽  
Nutrient Depletion ◽  
Soil Nutrient Depletion ◽  
Sub Saharan

scholarly journals Precision Agriculture for Resource Use Efficiency in Smallholder Farming Systems in Sub-Saharan Africa: A Systematic Review

2021 ◽  
Vol 13 (3) ◽  
pp. 1158
Author(s):  
Cecilia M. Onyango ◽  
Justine M. Nyaga ◽  
Johanna Wetterlind ◽  
Mats Söderström ◽  
Kristin Piikki
Keyword(s):  
Resource Use ◽  
Precision Agriculture ◽  
Large Scale ◽  
English Language ◽  
Management Practices ◽  
Smallholder Farmers ◽  
Management Strategies ◽  
Sub Saharan Africa ◽  
Smallholder Farming ◽  
Sub Saharan

Opportunities exist for adoption of precision agriculture technologies in all parts of the world. The form of precision agriculture may vary from region to region depending on technologies available, knowledge levels and mindsets. The current review examined research articles in the English language on precision agriculture practices for increased productivity among smallholder farmers in Sub-Saharan Africa. A total of 7715 articles were retrieved and after screening 128 were reviewed. The results indicate that a number of precision agriculture technologies have been tested under SSA conditions and show promising results. The most promising precision agriculture technologies identified were the use of soil and plant sensors for nutrient and water management, as well as use of satellite imagery, GIS and crop-soil simulation models for site-specific management. These technologies have been shown to be crucial in attainment of appropriate management strategies in terms of efficiency and effectiveness of resource use in SSA. These technologies are important in supporting sustainable agricultural development. Most of these technologies are, however, at the experimental stage, with only South Africa having applied them mainly in large-scale commercial farms. It is concluded that increased precision in input and management practices among SSA smallholder farmers can significantly improve productivity even without extra use of inputs.

scholarly journals Water flow pathways and the water balance within a head-water catchment containing a dambo: inferences drawn from hydrochemical investigations

1999 ◽  
Vol 3 (4) ◽  
pp. 581-591 ◽  
Author(s):  
M. P. McCartney ◽  
C. Neal
Keyword(s):  
Water Balance ◽  
Stream Water ◽  
Management Strategies ◽  
Dry Season ◽  
Sub Saharan Africa ◽  
Flow Paths ◽  
Headwater Catchments ◽  
Sub Saharan ◽  
Flow Pathways ◽  
Water Catchment

Abstract. Dambos, seasonally saturated wetlands, are widespread in headwater catchments in sub-Saharan Africa. It is widely believed that they play an important role in regional hydrology but, despite research conducted over the last 25 years, their hydrological functions remain poorly understood. To improve conceptualisation of hydrological flow paths and investigate the water balance of a small Zimbabwean catchment containing a single dambo, measurements of alkalinity and chloride in different water types within the catchment have been used as chemical markers. The temporal variation in alkalinity is consistent with the premise that all stream water, including the prolonged dry season recession, is derived predominantly from shallow sources. The proposition that dry season recession flows are maintained by water travelling at depth within the underlying saprolite is not substantiated. There is evidence that a low permeability clay lens, commonly present in many dambos, acts as a barrier for vertical water exchange. However, the highly heterogeneous chemical composition of different waters precludes quantitative hydrograph split-ting using end member mixing analysis. Calculation of the chloride mass-balance confirms that, after rainfall, evaporation is the largest component of the catchment water budget. The study provides improved understanding of the hydrological functioning of dambos. Such understanding is essential for the development and implementation of sustainable management strategies for this landform.

scholarly journals Phosphorus management strategies to increase lowland rice yields in sub-Saharan Africa: A review

2022 ◽  
Vol 275 ◽  
pp. 108370
Author(s):  
Tovohery Rakotoson ◽  
Yasuhiro Tsujimoto ◽  
Tomohiro Nishigaki
Keyword(s):  
Management Strategies ◽  
Lowland Rice ◽  
Sub Saharan Africa ◽  
Rice Yields ◽  
Sub Saharan
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