Agronomy Crop Production and Management

Question 1

What is the term for the number of days from planting to physiological maturity in corn?

Accepted Answer

Relative maturity rating

Answer

Vernalization period

Answer

Growing degree days (GDD) accumulation

Answer

Dormancy period

Question 2

Which cropping system plants two or more crops simultaneously in the same field?

Accepted Answer

Intercropping

Answer

Monoculture

Answer

Sequential cropping

Answer

Strip cropping

Question 3

What is the primary purpose of a cover crop in an agronomic rotation?

Accepted Answer

Protect and improve soil between cash crop seasons

Answer

Maximize cash crop yield

Answer

Increase soil salinity

Answer

Eliminate need for fertilizer permanently

Question 4

The R1 growth stage in soybeans corresponds to what developmental event?

Accepted Answer

Beginning of flowering

Answer

Emergence of first trifoliate leaf

Answer

Pod fill initiation

Answer

Seed maturation

Question 5

What is the recommended corn plant population for most US Corn Belt fields (plants per acre)?

Accepted Answer

32,000–36,000

Answer

10,000–15,000

Answer

20,000–25,000

Answer

50,000–60,000

Question 6

Which tillage practice leaves the greatest amount of crop residue on the soil surface?

Accepted Answer

No-till

Answer

Moldboard plowing

Answer

Chisel plowing

Answer

Disk tillage