Agronomy CDE

Soils should only be tilled when dry. This can be determined by performing a ____________.

• soil ribbon test

• check of the weather

• soil pH test

• none of these are correct

Which of the following is a component of a plant flower?

• stamen

• scutellum

• coleoptile

• all of these are correct

Nutrient runoff is carefully managed to prevent water contamination, especially during heavy rainfall. Which of the following practices reduces runoff in agricultural fields?

• cover crops

• buffer strips

• nutrient management

• all of these are correct

A commercially available fertilizer label reads 24-10-12. How much potassium oxide equivalent is in 100 pounds of this commercially available fertilizer?

• 10 lb

• 12 lb

• 24 lb

• none of these are correct

Strip-till farming practices combine no-till and convention-till applications. Only the __________ is disturbed when tillage occurs.

• seed row

• sub-soil

• crop residue

• none of these are correct

Soil organic matter tends to stabilize at a certain level for individual tillage systems and is specific to individual soil types. Which tillage system tends to slow the decomposition of crop residue?

• conservation tillage

• deep tillage

• conventional tillage

• high-speed tillage

A soybean crop is being planned; the soil test results indicate a P₁ test of 70 pounds per acre, so no build-up fertilizer is planned. The farm manager has examined the farm yield records, indicating a soybean yield of 58 bushels per acre yield goal. How much triple-super phosphate (0-45-0) should be applied to meet the maintenance fertilizer for the 58-bushel yield goal? Soybeans require 0.85 pounds of P₂O₅ per bushel harvested.

• 49 lb

• 110 lb

• 129 lb

• none of these are correct

The application of 100 lb of anhydrous ammonia will provide approximately _______ lb of nitrogen.

• 50

• 82

• 73

• 100

Tags

NGSS.MS-PS1-5

Which of the following soil conditions may result from excessive soil compaction?

• impeded drainage

• lower potassium & nitrogen uptake

• reduced soil aeration

• all of these are correct

Tags

NGSS.MS-LS2-5

NGSS.MS-LS2-4

Foliar fungicide is most effectively applied to corn plants at __________.

• tasseling

• soil emergence

• planting

• physiological maturity