Integrated Plant Nutrient Management in Sub-Saharan Africa : From Concept to Practice

by B. Vanlauwe; J. Diels; N. Sanginga; R. Merckx

• ISBN13: 9780851995762
• ISBN10: 0851995764
• Format: Hardcover
• Copyright: 2002-04-11
• Publisher: Cab Intl

Summary

Soil degradation and nutrient depletion have become serious threats to agricultural productivity in Africa. Soils cannot supply the quantities of nutrients required and yield levels decline rapidly once cropping commences. This book addresses these issues and includes papers from an international symposium held at Cotonou, Benin, October 9-12, 2000, organized by the International Institute of Tropical Agriculture, Ibadan, Nigeria and the Department of Land Management of the Katholieke Universiteit Leuven, Belgium. In five main parts it marks the end of a first phase of collaborative research on "Balanced Nutrient Management Systems for the Moist Savanna and Humid Forest Zones of Africa" and concludes with recommendations, providing essential reading for crop and soil scientists.

Table of Contents

Contributors	ix
Preface	xiii
Part I: General introduction
Introduction	1	(6)
Forty Years of Soil Fertility Work in Sub-Saharan Africa	7	(16)
R. Dudal
Soil Fertility Replenishment Takes Off in East and Southern Africa	23	(24)
P.A. Sanchez
B.A. Jama
Part II: Variability in biophysical and socio-economic factors and its consequences for selection of representative areas for integrated plant nutrient management research
A Systems Approach to Target Balanced Nutrient Management in Soilscapes of Sub-Saharan Africa	47	(16)
J. Deckers
In for a Penny, in for a Pound: Strategic Site-selection as a Key Element for On-farm Research that Aims to Trigger Sustainable Agricultural Intensification in West Africa	63	(12)
M.E.A. Schreurs
A. Maatman
C. Dangbegnon
Agricultural Transformation and Fertilizer Use in the Cereal-based Systems of the Northern Guinea Savannah, Nigeria	75	(12)
V.M. Manyong
K.O. Makinde
A.G.O. Ogungbile
Partial Macronutrient Balances of Mucuna/Maize Rotations in the Forest Savannah Transitional Zone of Ghana	87	(10)
J. Anthofer
J. Kroschel
Part III: Soil processes determining nutrient dynamics, in particular nitrogen and phosphorus
Process Research and Soil Fertility in Africa: Who Cares?	97	(16)
R. Merckx
Fertilizer Equivalency Values of Organic Materials of Differing Quality	113	(10)
H.K. Murwira
P. Mutuo
N. Nhamo
A.E. Marandu
R. Rabeson
M. Mwale
C.A. Palm
Plant N Uptake from Plant and Animal Organic Residues, Measured Using the Soil Pre-labelling'5N Isotope Dilution Approach	123	(10)
R. Hood
Contribution of Organic Residues to Soil Phosphorus Availability in the Highlands of Western Kenya	133	(10)
G. Nziguheba
R. Merckx
C.A. Palm
Resource Acquisition of Mixed Species Fallows - Competition or Complementarity?	143	(12)
G. Cadisch
S. Gathumbi
J.K. Ndufa
K.E. Giller
Part IV: Interactions between organic and mineral nutrient sources
Targeting Management of Organic Resources and Mineral Fertilizers: Can we Match Scientists' Fantasies with Farmers' Realities?	155	(18)
K.E. Giller
Direct Interactions between N Fertilizer and Organic Matter: Evidence from Trials with 15N-labelled Fertilizer	173	(12)
B. Vanlauwe
J. Diels
K. Aihou
E.N.O. Iwuafor
O. Lyasse
N. Sanginga
R. Merckx
On-farm Evaluation of the Contribution of Sole and Mixed Applications of Organic Matter and Urea to Maize Grain Production in the Savannah	185	(14)
E.N.O. Iwuafor
K. Aihou
J.S. Jaryum
B. Vanlauwe
J. Diels
N. Sanginga
O. Lyasse
J. Deckers
R. Merckx
Yield Trends, Soil Nitrogen and Organic Matter Content During 20 Years of Continuous Maize Cultivation	199	(10)
J. Gigou
S.K. Bredoumy
Part V: Improved utilization of phosphate rock and capitalization of soil phosphorus
Meeting the Phosphorus Needs of the Soils and Crops of West Africa: the Role of Indigenous Phosphate Rocks	209	(16)
U. Mokwunye
A. Bationo
Options for Increasing P Availability from Low Reactive Phosphate Rock	225	(14)
O. Lyasse
B.K. Tossah
B. Vanlauwe
J. Diels
N. Sanginga
R. Merckx
Phosphorus Uptake from Sparingly Available Soil-P by Cowpea (Vigna unguiculata) Genotypes	239	(12)
G. Krasilnikoff
T.S. Gahoonia
N.E. Nielsen
Improving Phosphate Rock Solubility and Uptake and Yields of Lowland Rice Grown on an Acidic Soil Amended with Legume Green Manure	251	(14)
E.A. Somado
R.F. Kuehne
M. Becker
K.L. Sahrawat
P.L.G. Vlek
Part VI: Decision support systems to improve resource use at farm level; on-farm testing of improved technologies
Decision Making on Integrated Nutrient Management through the Eyes of the Scientist, the Land-user and the Policy Maker	265	(20)
E.M.A. Smaling
J.J. Stoorvogel
A. de Jager
Legumes: When and Where an Option? (No Panacea for Poor Tropical West African Soils and Expensive Fertilizers)	285	(14)
H. Breman
H. van Reuler
Options for Soil Organic Carbon Maintenance under Intensive Cropping in the West African Savannah	299	(14)
J. Diels
K. Aihou
E.N.O. Iwuafor
R. Merckx
O. Lyasse
N. Sanginga
B. Vanlauwe
J. Deckers
On-farm Research and Operational Strategies in Soil Fertility Management	313	(20)
P.L. Woomer
E.J. Mukhwana
J.K. Lynam
Part VII: Recommendations
Recommendations	333	(6)
Index	339