The Green Revolution
Plowing and tilling allow nutrients from which horizon to rise to the surface?
Which of the following is known as reverse succession?
Which of the following is an environmental impact caused by synthetic, inorganic nitrogen fertilizer?
How do some insect pests become resistant to pesticide?
Pest Control is most commonly achieved by the application of pesticides, especially in developed countries. Pesticides reduce pests but have some adverse consequences. Repeated pesticide use over generations of pests can lead to resistance in pests.
Which pest control method is least likely to result in pest resistance?
Large amounts of water have been withdrawn from the Oglala aquifer in the Great plans. The slow rate of recharge in the aquifer is not keeping pace with the fast rate of water withdrawals from the aquifer.
when deep wells within aquifers like the Oglala are heavily pumped, one result that can occur is that.
Sustainable farming methods include a variety of farming methods that can be used to improve agricultural yields and retain soil and nutrients.
The sustainable farming practices of intercropping with trees and vegetables to provide windbreaks is called.
Avoiding pesticides and synthetic fertilizers allows farmers to have less of an impact on the environment when ______ farming is practiced
The fossil fuel energy and human energy input per calorie of food produced —beyond that which is provided by the sun—is called an energy subsidy. For example, if it takes 20 kg (44 pounds) of grain to feed cattle to produce 1 kg (2.2 pounds) of beef, the energy subsidy is 20.
Use the energy subsidies for various methods of food production and diets shown in the figure below to determine how many times greater the energy input to provide food from far-offshore fishing is than providing food from coastal fishing .
Salinization salts can reach toxic concentrations and impede plant growth.
Salinization occurs
When forests are destroyed by burning, all carbon contained within trees is released to the atmosphere. Subsequently, carbon in the atmosphere is not removed by trees because the trees are no longer there, as shown in the diagram below.
Normally, carbon dioxide taken in from the atmosphere during photosynthesis [shown in the diagram] is released in equal amounts by
Ultimately, slash-and-burn agriculture leads to a net loss of nutrients due to
Which statement best describes the results of repeated pesticide use over generations of pests?
Which irrigation method is most efficient?