Title: Sustainable resource management coupled to resilient germplasm to provide new intensive cereal-grain-legume-livestock systems in the dry savanna
Authors: Sanginga, N ×
Dashiell, KE
Diels, Jan
Vanlauwe, B
Lyasse, O
Carsky, RJ
Tarawali, S
Asafo-Adjei, B
Menkir, A
Schulz, S
Singh, BB
Chikoye, D
Keatinge, D
Ortiz, R #
Issue Date: 2003
Publisher: Elsevier
Series Title: Agriculture, Ecosystems & Environment vol:100 pages:302-314
Abstract: Sustainable resource management is the critical agricultural research and development challenge in sub-Saharan Africa.
The accumulated knowledge on soil management gathered over the last 10 years, combined with solid crop improvement and
plant health research at farmers’ level, has brought us to a stage where we can now address with confidence the intensification
of cereal–grain–legume-based cropping systems in the dry savanna of West Africa in a sustainable and environmentally
positive manner.
Two sustainable farming systems that greatly enhance the productivity and sustainability of integrated livestock systems
have been developed and implemented in the dry savanna of Nigeria. These are: (i) maize (Zea mays L.)–promiscuous
soybean [Glycine max (L.) Merr.] rotations that combine high nitrogen fixation and the ability to kill large numbers of Striga
hermonthica seeds in the soil; and (ii) miflet [Eleusine coracana (L.) Gaerth] and dual-purpose cowpea [Vigna unguiculata (L.)
Walp.]. Improvement of the cropping systems in the dry savanna has been driven by the adoption of promiscuously nodulating
soybean varieties (in particular TGx 1448-2E) and dual-purpose cowpea. The rate of adoption is very high, even in the absence
of an efficient seed distribution system. The number of farmers cultivating the improved varieties increased by 228% during
the last 3 years. Increased production of promiscuous soybean has been stimulated by increased demand from industries and
home utilization. Production in Nigeria was estimated at 405,000 t in 1999 compared to less than 60,000 t in 1984. Economic
analysis of these systems shows already an increase of 50–70% in the gross incomes of adopting farmers compared to those
still following the current practices, mainly continuous maize cultivation. Furthermore, increases in legume areas of 10% in
Nigeria (about 30,000 ha in the northern Guinea savanna) and increases of 20% in yield have translated into additional fixed
nitrogen valued annually at US$ 44 million. This reflects, at the same time, an equivalent increase in land-use productivity, and
with further spread of the improved crops, there are excellent prospects for additional economic and environmental benefits
from a very large recommendation domain across West Africa
ISSN: 0167-8809
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Earth and Environmental Sciences
Division Soil and Water Management
× corresponding author
# (joint) last author

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