文档介绍：Oklahoma Cooperative Extension Service F-6007
Improving Garden Soil Fertility
David Hillock
Assistant Extension Specialist Oklahoma Cooperative Extension Fact Sheets
Horticulture are also available on our website at:
Fresh vegetables are an excellent source of the vitamins
and minerals essential to good health. A garden soil well
supplied anic matter and needed minerals will, under
favorable conditions, produce a good yield of vegetables which
are high in quality and nutritional value.
In order to mercial fertilizers to best advantage, porous, permit excess water to drain away, and air to enter.
anic content of soils must be maintained at a high level. The plant absorbs mineral elements and water from the
Adding some form anic matter to the soil each year is a soil and carbon dioxide gas from the air. The elements most
good garden practice. In addition to the use of animal manure frequently deficient include those normally present mer-
to anic matter, posted plant material such as cial fertilizers—nitrogen, phosphorus, and potassium. Another
leaves, cotton burrs, hay, or straw will do. Composted materi- important nutrient element—calcium—is added mercial
als can either be spread on, mixed with the soil, or used as a fertilizers and more particularly in agricultural lime that also
mulch around growing crops. serves as a neutralizing agent. Other