1979-01-01 The objective of this paper is to describe some of the soil-water-crop problems that were encountered by researchers in Puerto Rico on Oxisols and Ultisols and in Brazil on Oxisols and to suggest some important1/1/1979 management practices and consequences for highly weathered soils in other...
1984-01-01 Excessive soil acidity is a continuing problem in many agricultural areas and is increasingly becoming a yield-limiting factor in other areas. The pH of soils of the dryland wheat-growing area of the Pacific Northwest has dropped an average of one unit in the last 20 years. Similar effects are...