The Role of Crop and Industrial Residues on Erosion Control, Properties and Productivity of Some Major Soils of Puerto Rico

摘要

Field, greenhouse and laboratory data are presented on the effect of crop and industrial residues on erosion control properties, and productivity of several tropical soils at more than 20 different sites representative of vast areas of Puerto Rico. There are rather high reserves of organic matter and N in the soils of Puerto Rico. Their full utilization and conservation appears to be a worthy goal for crop production and fertility maintenance. The evidence herein reported tends to show that the addition of low N organic matter toOxisols and related soils, for the purpose of raising their organic matter contents, is of rather doubtful value, since organic matter levels remain unaffected and crop yields are not improved.