SOIL Soil is a valuable natural resource. - PowerPoint PPT Presentation

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SOIL Soil is a valuable natural resource.

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... farmers plant different crops each year that use different nutrients from the soil (corn/cotton oats/barley/rye beans/alfalfa) 4. Terracing farmers plant ... – PowerPoint PPT presentation

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Title: SOIL Soil is a valuable natural resource.


1
SOIL Soil is a valuable natural resource.
2
Why? Because everything that lives on land
depends on soil. People animals eat food that
grows in soil. Plants need fertile soil to grow
well to make good food.
3
(No Transcript)
4
Soil can be damaged by loss of fertility
5
LOSS of FERTILITY In the South in the 1800s
where cotton had been grown for years, the soil
was exhausted, not fertile enough to grow healthy
crops. Farmers left their farms.
6
George Washington Carver came up with a new way
of farming with peanuts to bring nutrients back
to the soil.
7
Soil can be damaged by loss of topsoil
8
LOSS of TOPSOIL The grasses of the Plains had
been plowed for crops (when soil is uncovered,
wind and water can erode the topsoil), then
drought caused the crops to die and dirt to blow
away, resulting in The Dust Bowl in TX, OK, KS
9
Since the Dust Bowl, farmers have found ways to
take care of the soil and prevent its destruction
called soil conservation.
10
SOIL CONSERVATION (4 methods)
11
1. Contour Plowing farmers plow along the
curves of the land to prevent water from washing
away soil rows of garden look curvy instead of
straight
12
2. Conservation Plowing (No-Till Plowing)
farmers leave the dead plants to keep the soil
covered and in place dont cut down or plow old
crops
13
3. Crop Rotation farmers plant different
crops each year that use different nutrients from
the soil (corn/cotton ?oats/barley/rye?beans/alfal
fa)
14
4. Terracing farmers plant crop on different
levels on a hillside to maximize the area of
usable land and keep healthy soil in place looks
like steps on the hill
15
WHY is it important to take care of our
soil? HOW can we take care of our soil around
our houses and school? A farmer growing corn
wants to maintain soil fertility reduce
erosion. What conservation methods could he try?
Explain.
FOOD FOR THOUGHT
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