Mulching can actually provide habitat for slugs, while removing mulch and topsoil puts your fields at serious risk of soil depletion and eventual erosion. Flooding your fields is also ineffective and could jeopardize your existing crops (and soil health for that matter!). Finding and squishing every single pest might put a small dent in the crops lost, but how much is your time worth? Mixed cropping is the best option, because many pests are specialists and feed off certain crops (leafy greens, drupes, etc.). Some of your crops will suffer but not all of them.

Terracing creates level shelves on hillsides to hold water and soil for growing crops. This method can be very expensive. Rangelands are the areas of land that are grazed on by animals. A monoculture refers to the cultivation of a single crop or animal, while a polyculture involves the cultivation of multiple different types of crops and/or animals in a given area.

The correct response is Norman Borlaug. He is regarded as the "Father of the Green Revolution" and won the Nobel Peace Prize in 1970. His work specialized in creating high-yielding varieties of crops, such as wheat, to increase the global food supply.

A plant almost never uses as much fertilizer as it is given, and in the case of synthetic fertilizers especially, the nutrients are also often over-applied for efficiency's sake. This over-application leads to fertilizer buildup in the soil as more and more goes unused. When certain concentrations of the fertilizers are reached, the chemicals in the fertilizer form salts, leading to what we call soil salinization, which is a condition where plants can't grow very well.

Shelterbelts do fix carbon and some trees do fix nitrogen, but the dominant ecological benefit is their limiting of wind-caused soil erosion. Shelterbelts mimic a forest ecosystem by diverting wind currents away from soil that is often exposed by tilling.

The correct response is subsistence agriculture. The definition of subsistence agriculture is planting enough for just your family. We don't that what she is doing is sustainable - she could be dumping chemicals and destroying biodiversity for all we know. The key is that we know that she is planting just enough food for her family.

A very large collection of the same species, such as a large field of one type of crop only, is extremely attractive to species-specific pests, which only see a great deal of food. This means monoculture farmers need to use a lot of pesticide. Such collections are also very vulnerable to disease; because all of the plants in a field are identical, this means a single fungus or virus can infect them all very easily. Finally, every plant needs the same kind of nutrient, which means they use up what's in the soil very quickly. This means monoculture farmers also need to use lots of fertilizer.

Vegetation used for green material is typically still-growing or freshly cut.

The correct response is polyculture. A polyculture describes a farm that grows more than one crop together on the same field. This is also referred to as diversified farming and intercropping. Subsistence farming is incorrect because this describes a farming who grows food for just his family. Since Greg has 1000 acres, this answer choice doesn't make sense. Monoculture describes a farmer who grows only one crop.

The farmer should use a nonselective herbicide. We can narrow down the answer choices to herbicides because they are used to control plants and weeds. The question also states that there are multiple species of weeds that the farmer needs to control. This means the farmer should use a nonselective herbicide, which kills multiple species—rather than a selective herbicide that will only kill a certain plant species. Insecticides are the wrong answer choice because they control for insects, not plants.