English (en) | Change Language
  1. 1978-04-01 488 pages, illustrated, tables
  2. 1985-05-01 This paper summarizes some of the available information about the geographical distribution of soils, common misconceptions about them, soil constraints, land-clearing methods, and soil management options for the American humid tropics. Emphasis is given to the Amazon Basin because of its size,...
  3. 1975-06-01 66 pages, tables Cornell International Agricultural Bulletin 30
  4. 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...
  5. 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...