Dry Times
a long period of little or no rainfall
What is a drought?
A large ditch or small valley created by running water eroding sharply into soil
What is a gully?
Reduced tillage affect wildlife this way.
What is increases food available in the winter?
Land used for grazing cattle
What is pasture?
One benefit or reason for tilling soil before planting crops
What is to bring leached nutrients to the surface?
or
What is to bury weeds?
or
What is to add nutrients from the plants in to the soil structure?
A relatively dry land region becoming increasingly more dry, losing its bodies of water as well as vegetation and wildlife
What is desertification?
The moving of rock and soil particles from one location to another
What is erosion?
Reduced tillage affect surrounding streams this way.
What is reduces dredging, reduces siltation, and makes it easier for fish to breathe?
The surface of the ground, with the grass growing on it
What is sod?
Cover crops do this to reduce erosion.
Their roots hold loose soil in place.
the 1930’s event that lead to the erosion of large amounts of soil in the middle of the United States
What is the Dust Bowl?
The removal of large areas of trees
What is deforestation?
Reduced tillage affect the amount of land that can be used for crops this way.
What is increases?
The preparation of soil by digging, stirring, and overturning with a shovel, hoe or plow
What is tillage?
This is how a crop rotation helps maintain good soil.
What is to replace nutrients that one crop uses with another crop?
Growing a series of different types of crops in an area in different seasons to keep the soil healthy and prevent erosion
What is a crop rotataion?
A crop planted primarily to manage soil erosion
What is a cover crop?
Reduced tillage affect the amount of pesticide used on a field this way.
What is increases?
What is phytoremediation?
The negative effects of reduced tillage.
What are increased pests, slower growth due to less evaporation, and delayed warming of soil?
Bringing water to an area for the purpose of increasing plant growth
What is irrigation?
Planting crops in rows to prevent erosion
What is strip cropping?
Three methods to reduce tillage.
What is strip cropping, no till planting, and ridge tilling?
The percent of the US productive soil compared to the rest of the world.
What is greater?
Planting trees to slow the wind.
What is a windbreak?