By Julie Kerr Casper

ISBN-10: 0816063524

ISBN-13: 9780816063529

ISBN-10: 1438105541

ISBN-13: 9781438105543

Explores essentially the most vital makes use of of the land: the construction of agriculture. This ebook is helping readers study that farms and ranches produce even more than meals; yet scientists, farmers, ranchers, and different landowners have not solved conservation difficulties - but.

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Additional info for Agriculture: The Food We Grow and Animals We Raise (Natural Resources)

Example text

Once the land has been overused or eroded, it is often nonrenewable because soil takes too long to re-form. This is one of the most important issues in land stewardship. The Dust Bowl of the 1930s It took many years and the extensive erosion and loss of valuable agricultural soil before American farmers learned the lesson that George Washington was trying to teach back in 1788. The worst loss of agricultural soil in American history occurred during the early 1900s. During World War I (1914-1918), there were significant wheat shortages, which caused the price of wheat to rise dramatically.

Invasive weeds are nonnative (did not originate in the area they are growing in) and ecologically damaging plants. Invasive weeds are plants that developed in other regions. Growing in their own regions, they are not considered invasive weeds that harm the environment because they developed within the local ecosystem. They are naturally controlled by competition with other plants and by insects, diseases, and other predators. When their population increases in the region they originated in, insects and other predators keep them under control.

Fallow land is land that is left unplanted so it can recover nutrients that may have been lost from a previous crop. It gives the soil time to rest. Buffer strips, contour farming, and terracing are all conservation techniques that the farmer can use. ) In addition, composting can be used to add additional nutrients to the soil (called soil augmentation). Compost is a mixture that is made up of decayed organic matter and is used for fertilizing and conditioning the land. Ranchers can take care not to overgraze their land, which uses up all the nutrients in the soil.

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Agriculture: The Food We Grow and Animals We Raise (Natural Resources) by Julie Kerr Casper

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