By Julie Kerr Casper
Explores probably the most vital makes use of of the land: the creation of agriculture. This booklet is helping readers examine that farms and ranches produce even more than nutrients; yet scientists, farmers, ranchers, and different landowners have not solved conservation difficulties - but.
Read Online or Download Agriculture: The Food We Grow and Animals We Raise PDF
Best science studies books
Provides an account of the 1984 chemical coincidence on the Union Carbide plant in Bhopal, India, and explores how the research of such injuries can result in security reform.
The superb Human physique discusses the composition and serve as of the advanced networks and structures inside of bodies.
- Environmental Science: In Context
- Garbage and recycling
- Muscles (The Amazing Human Body)
- Zebra Mussel
Extra info for Agriculture: The Food We Grow and Animals We Raise
Farmers have been able to add weeks—sometimes months—to their growing season to produce more food. Fruits, vegetables, and flowers can be grown in high tunnels. Some farmers grow their produce organically, without any agrochemicals. 37 38 agriculture The Soil Conservation Act Hugh Hammond Bennett, a soil scientist and member of President Franklin D. Roosevelt’s administration, realized that every American’s future was tied to the plight of the Dust Bowl farmers. It affected the entire country, not just the Great Plains.
Some farmers have stopped using chemicals and have switched to organic farming and a practice called crop rotation (growing different crops each season) to keep pests down instead of using pesticides. They use animal manure instead of chemical fertilizers and herbal remedies instead of antibiotics. concepts of agriculture Another problem with modern farming is that sometimes farmers grow so much grain that they cannot sell it at a profit. Sometimes governments buy it and store it. Governments try to keep the supply and demand balanced so that farmers do not grow too much and lose money or do not grow enough and make food prices rise out of control.
The balance can be so upset, in fact, that a process called desertification can take place, making the area uninhabitable for plants, animals, and even people. So, while many people may think that fruits, vegetables, grains, flowers, trees, and animals are automatically renewable—that is not necessarily so. Their availability is part of a complex system that must be delicately balanced. The key to understanding this system is to understand six important natural cycles that exist on Earth. The Six Critical Resource Cycles: Maintaining a Delicate Balance The six cycles that work together are the water, nitrogen, carbon, phosphorus, oxygen, and energy cycles.