HelP pLEASE =)
A student observes poor growth of plants in a garden containing high clay content. Clay content reduces drainage in soil. Which of these is the best method to improve plant growth in the garden?
water the plants once a month
mix soil with chemicals which absorb the air
do not dig or till the soil
add sand to the soil
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When plants (trees & shrubs) are cleared from a site, soil is exposed to sunlight and the eroding effects of wind and water. Soil aeration is increased and the rate of weathering increases.
Apart from erosion, the proportion of organic matter in the soil gradually decreases, through the action of microbes in the soil which use it as a source of energy ‑ unless the new land use provides some replacement.
TYPES OF SOIL DEGRADATION
A number of major soil related problems occur in Australia these include:
-Loss of soil fertility (see lesson on nutrition)
-Build up of dangerous chemicals
Add sand. that will increase drainage, as sand is pourous.