Soil organic matter dynamics and sustainability of tropical agriculture : proceedings of an international symposium organized by the Laboratory of Soil Fertility and Soil Biology, Katholieke Universiteit Leuven (K.U. Leuven) and the International Institute of Tropical Agriculture (IITA) and held in Leuven, Belgium, 4-6 November 1991 / edited by K. Mulongoy and R. Merckx.

CONTENTS

Introduction

part 1: Characterization and quantification of soil organic matter
biochemical methods to estimate soil microbial biomass
soil microhabitats and the importance of fractionation method
Effect of alley cropping and fallowing on some soil fertility parameters in southern Nigeria

Part 2: Organic inputs and soil organic matter
organic inputs, soil organic matter and functional soil organic compartments in low - activity clay soils in tropical zones
The potential od siam weed as a source of organic matter for soils in the humid tropics
The partitioning of root-derived carbon within the rhizospher of arable crops
evolution of organic matter in some soils under shifting cultivation practices in Burkina faso

Part 3: Nutrient cyclinic and processes regulating the transformation of soil organic matter
In situ estimation of soil nitrogen mineralization
mineralization of nitrogen in woody legume prunings and its recovery by maize
carbon and nitrogen mineralization of cattle manures, subjected to different treatments, in Zimbabwe and swedish soils

Part 4: Soil organic matter and soil fertility
changes in soil chemical properties and crop performance with continuous cropping on an entisol in the humid tropics
reduction of potassium fixation by organic matter in vermiculitic soils
the efficient use of much layers to reduce runoff and soil loss
e.tc