Soil Quality and Nutrient Management for Sustainable Food Production in Mulch-based Cropping Systems in Sub-Saharan Africa

Closed for proposals

Project Type

Coordinated Research Project

Project Code

D15012

CRP

1760

Approved Date

15/07/2011

Status

3 - Active - Ongoing

Start Date

18/11/2011

Expected End Date

17/12/2016

Completed Date

23/04/2018

Participating Countries

Austria
Belgium
Benin
China
Czech Republic
Kenya
Madagascar
Mauritius
Mozambique
New Zealand
Pakistan
United Kingdom of Great Britain and Northern Ireland
United States of America
Zimbabwe

Description

The overall objective of this CRP is to pilot test soil management and agronomic practices in mulch-based farming systems that aim to restore soil fertility, optimize ecosystem service efficiency and increase agricultural productivity, while adapt to and mitigate the adverse effects of climate change and variability in cropping or integrated crop-livestock systems in the moist and dry savannahs of Sub-Saharan Africa (SSA).  The goal is to improve the livelihoods of resource-poor farmers and rural communities in the region which is dominated by a savannah ecosystem in its natural state.  The key to the management of soils in mulch-based farming systems is to increase the soil organic matter content (carbon sequestration) and to maximize the efficiency of utilization of soil nutrients, applied synthetic and organic fertilizers and water storage for crop growth. Soil organic matter plays a key role in soil fertility by providing plant nutrients, especially nitrogen, phosphorus and sulphur, stabilizing soil structure (aggregation, porosity) which in turn improves the capacity of the soil to absorb and hold water for crop growth, as well as providing a carbon source for the soil fauna and flora which themselves interact with and enhance the soil’s chemical and physical properties.  The use of stable isotopic techniques (13C and 15N) at enriched or natural abundance levels will facilitate an in-depth analysis and understanding of the basic soil biological-physical processes, including soil C and nutrient cycling in mulch-based systems.  The CRP will provide a platform for extrapolation of the recommended practices to all agro-ecological regions of SSA because of the selection of benchmark sites in diverse and representative environmental conditions.

Objectives

To pilot test soil management and agronomic practices in mulch-based agricultural systems that aim to restore soil fertility, optimize ecosystem service efficiency and increase agricultural productivity, while adapt to and mitigate the adverse effects of climate change and variability in cropping and integrated crop-livestock systems in the moist and dry savannahs of Sub-Saharan Africa (SSA). 

Specific objectives

To assess economic feasibility and conduct impact assessment of mulch-based farming systems in SSA

To improve soil fertility and soil health by promoting carbon sequestration through the replacement of exported nutrients (especially N, but also P and S to a lesser extent) and by applying the principles of conservation agriculture

To increase on-farm and area-wide ecosystem service efficiency (e.g. nutrient, water, labour and energy use efficiency)

To increase productivity in integrated crop-livestock systems across different spatial scales in the moist and dry savannahs of SSA.

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