Advances in Soil Science

The topics addressed in volume 20 of this well-reviewed series include: Physical Fractionation of Soil and Organic Matter in Primary Particle Size and Density Separates.- Soil Water Repellency.- Stem-Nodulating Legume-Rhizobium Symbiosis and Its Agronomic Use in Lowland Rice.- Nutrient Transformations in Soils Amended with Green Manures.