Biological nitrogen fixation and sustainability of tropical agriculture : proceedings of the Fourth International Conference of the African Association for Biological Nitrogen Fixation (AABNF), held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 24-28 September 1990 / edited by K. Mulongoy, M. Gueye, and D.S.C. Spencer.

CONTENTS

Introduction
Biological nitrogen fixation in tropical macrosystems: Twenty years of biological nitrogen fixation research in Africa
Sustainable agriculture: Definition and measurement

Part1: Nitrogen-fixing systems
Biologicals nitrogen fixation systems in tropical ecosystems: an overview
A protocol for screening legumes as soil improving crops
The sustenance of tropical agriculture with multipurpose
e.tc

Part 2: Biotechnology and modelling in nitrogen fixation
Supemodulation and non nodulation mutants of soybean
Croissance des racines adventives de sesbania rostrata
Genetically improved rhizobia and their use in agriculture
e.tc

Part 3 Measurement and socioeconomic impact of nitrogen fixation
estimation of biological nitrogen fixation by three legume tree species
measuring nitrogen fixed by groundnuts varieties in Senegal using N techniques
e.tc

Part 4 Sustainability of nitrogen fixing cropping systems
nodulation and nitrogen fixation and transfer in a cow pea/rice cropping system
The role of legumes in sustaining soil productivity and controlling soil erosion
nitrogen contribution of woody legumes in alley cropping systems
e.tc

Includes bibliographical references.