soil conservation
Post on 24-Feb-2016
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IMPORTANCE OF SOIL Soil provides minerals and nutrients for
plants. All animals get energy from plants,
since all food chains start with plants as producers.
SOIL IS TEAMING WITH LIFE! Soil is full of many living things, such as
bacteria, fungi, worms, insects and small mammals.
Each one serves and important purpose.
EROSION Erosion is the process by which wind,
water, gravity, or ice transport soil and sediment from one location to another.
Soil unprotected by plant growth can be lost.
SALINIZATION The accumulation of salts in soil is
known as salinization. Common to parts of the world where
rainfall is low.
DEFORESTATION Clearing of trees from land area without
replacing them is deforestation. Leaves soil exposed to erosion.
LAND DEGRADATION When soil is overused it loses its
nutrients. This is called land degradation. This can happen from poor farming
techniques, over mining, cutting trees or overgrazing.
DESERTIFICATION Desertification is a process where land
becomes more desert-like as a result of change in climate, prolonged drought, or human activity.
SOIL CONSERVATION Soil Conservation is a method to
maintain the fertility of soil by preventing erosion and the loss of nutrients.
SOIL CONSERVATION There are many ways that farmers help
prevent erosion. We will focus on the physical measures. Contour plowing Terracing No-till farming Cover crops Crop rotation
NO-TILL FARMING No-till farming is a method of farming
where the farmer harvests his crops without turning over the soil.
COVER CROPS Cover crops are crops that are planted
between harvests to replace certain nutrients in the soil and prevent erosion.
CROP ROTATION Rotating crops from one year to the
next in order to slow down nutrient depletion. And reduce insect damage to crops.
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