1. Key Resource 2002-01-01 Acidification of soil is a natural process with major ramifications on plant growth. As soils become more acid, particularly when the pH drops below 4.5, it becomes increasingly difficult to produce food crops. As soil pH declines, the supply of most plant nutrients decreases while aluminum and a...
  2. Key Resource 2008-10-02 This practical handbook describes sampling and laboratory assessment methods for the biodiversity of a number of key functional groups of soil organisms, including insects, earthworms, nematodes, fungi and bacteria. The methods have been assembled and the protocols drafted by a number of...
  3. Key Resource 2009-01-01 Smart gardeners know that soil is anything but an inert substance. Healthy soil is teeming with life-not just earthworms and insects, but a staggering multitude of bacteria, fungi, and other microorganisms. When we use chemical fertilizers, we injure the microbial life that sustains healthy...
  4. Key Resource 1989-01-02 [see also 631.491 YOU - volume updated, and with title change] This book is a review of the potential of agroforestry for soil conservation, treated in its wider sense to include both control of erosion and maintenance of fertility. The objectives are: To summarize the present state of knowledge...
  5. Key Resource 2001-01-01 Food security in West Africa is challenged by complex issues, including rapid population growth, exploitation of nonrenewable resources, and chronic low soil fertility, but in this text experts from world agricultural institutions share their work to provide solutions. Topics covered include soil...
  6. 2018-08-05
  7. The Cornell Soil Health Assessment Training Manual: Provides an overview of the concept of soil health. Describes soil constraints and soil quality issues common to soils in New York and the Northeast region, especially in vegetable and field crop production systems. Provides guidelines on how to...
  8. 2017-01-20 Esta publicación es el Capítulo 2 de Opciones para los agricultores de pequeña escala es un libro lleno de opciones prácticas para aquellos que trabajan para ayudar a los agricultores a pequeña escala y jardineros urbanos en los trópicos y subtrópicos, muchos que luchan para producir suficiente...
  9. 2012-04-10 Dirt, soil, call it what you want―it's everywhere we go. It is the root of our existence, supporting our feet, our farms, our cities. This fascinating yet disquieting book finds, however, that we are running out of dirt, and it's no laughing matter. An engaging natural and cultural history of...
  10. A group of scientists, farmers and staff from development organizations in Malawi and Tanzania put together an integrated curriculum onagroecology,climate change,nutritionandsocial equity. This training material was written in such a way that rural people with limited education can use it to...