Agronomy CDE

Plants that complete their life cycle in one year or less are classified as:

• annuals

• perennials

• biennials

• none of these are correct

An acceptable soil pH for growing grains such as corn and soybeans is:

• 5.3

• 6.5

• 7.5

• none of these are correct

Tags

NGSS.MS-LS1-5

Soil temperature in the fall determines when ammonium nitrogen fertilizer may be applied without excessive nitrification occurring during the fall and winter. When soil temperature at the 4-inch level drops below _______°F ammonium nitrogen fertilizer applications become economical.

• 27

• 32

• 50

• 75

Which of the following soil additives is typically applied to increase soil pH?

• limestone

• glyphosate

• anhydrous ammonia

• ammonium sulfate

Which of the following are atmospheric variables (weather) that impact agronomic crops?

• precipitation

• air temperature

• humidity

• all of these are correct

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Soybeans are stimulated to flower (bloom) by __________, also called photoperiod.

• maturity group

• length of day

• planting date

• accumulated growing degree days

Which of the following are basic components of seeds?

• seed coat

• food source

• embryo

• all of these are correct

Which of the tools listed below should be used to collect the soil core samples?

• soil tube

• post-hole auger

• hatchet

• sod cutter

Which soil tillage system is described as leaving the soil undisturbed from harvest to seeding and from seeding to harvest?

• mulch-till

• ridge-till

• strip-till

• no-till

The proper depth for collecting soil samples for pH, phosphorus, and potassium is _________ inches.

• 7

• 11

• 30

• none of these are correct