CCA Crop Management Systems 2

Question 1

Which cropping system is most effective at breaking pest and disease cycles while maintaining soil health?

Accepted Answer

Crop rotation with diverse species

Answer

Continuous monoculture

Answer

Intensive tillage between crops

Answer

Applying broad-spectrum pesticides every season

Question 2

In a no-till corn-soybean rotation, surface residue management primarily affects which of the following?

Accepted Answer

Soil temperature and moisture in early spring

Answer

Atmospheric nitrogen fixation rates

Answer

Subsoil drainage capacity

Answer

Grain protein content at harvest

Question 3

A farmer notices yield drag after several years of continuous corn. Which practice BEST addresses this issue without switching to a different crop?

Accepted Answer

Rotating to soybeans for at least one year

Answer

Increasing seeding rate by 20%

Answer

Subsoil tillage to break compaction layers

Answer

Applying additional foliar nitrogen at V6

Question 4

What is the primary agronomic benefit of using cover crops in a cash crop system?

Accepted Answer

They prevent soil erosion and improve soil organic matter

Answer

They provide harvestable grain in off-season months

Answer

They eliminate the need for starter fertilizer

Answer

They fix atmospheric phosphorus for subsequent crops

Question 5

Strip-till is best described as a system that:

Accepted Answer

Tills only narrow bands where seeds will be placed, leaving inter-row residue intact

Answer

Tills the entire field surface to a depth of 12 inches

Answer

Removes all surface residue before planting

Answer

Combines herbicide application with deep subsoiling in one pass

Question 6

Which factor most limits the adoption of organic crop management systems on highly productive corn-belt soils?

Accepted Answer

The 3-year transition period with restricted input use and potential yield loss

Answer

Lack of available cover crop seed varieties

Answer

Inability to grow legumes in the Midwest

Answer

Organic certification prohibits the use of GPS guidance systems

Question 7

Allelopathy in crop management refers to:

Accepted Answer

Chemical inhibition of one plant species by compounds released from another

Answer

The attraction of beneficial insects to flowering crops

Answer

The use of crop diversity to suppress weeds mechanically

Answer

Nitrogen transfer between legume and grass species