The problem of soil erosion is as old as history. Its significance, however, is rapidly increasing. As population increases, the area of cropland for each person shrinks. Between 1950 and 1975, world population increased by 59% and the area of cereals expanded by 21 %. This increased area was sufficient because of increased yields due to improved agricultural technology. How about the future? Projections of world food demand for the Year 2000 are roughly double 1975 production. To meet this demand, cultivation of our land resources must be both intensified and extended onto marginal soils. Presently, many of the methods designed to raise land productivity in the near-term lead to excessive soil loss. Agronomists and soil scientists must take the lead to develop improved technologies that are cost-effective and energy-efficient, and which will control soil erosion.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $20. ThriftBooks.com. Read more. Spend less.