Soil Science & Fertilization Flashcards
6 cards from real CHT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Soil Science & Fertilization flashcards as text
Which potassium source is most commonly used in professional horticulture?
Answer: Muriate of potash (KCl)
Muriate of potash (potassium chloride, KCl) is the most widely used and cost-effective potassium fertilizer in commercial horticulture.
Iron chlorosis in plants is most commonly associated with:
Answer: High soil pH above 7.0
At high pH (above 7.0), iron becomes insoluble and unavailable to plants, causing yellowing (chlorosis) of young leaves.
A 50-lb bag of 10-10-10 fertilizer contains how many pounds of actual nitrogen?
Answer: 5 lbs
10% of 50 lbs = 5 lbs of actual nitrogen in a 50-lb bag of 10-10-10 fertilizer.
Vermicompost is produced by:
Answer: Earthworms breaking down organic material
Vermicompost is the product of earthworms (typically Eisenia fetida) digesting organic matter, producing a nutrient-rich, biologically active amendment.
Soil compaction primarily harms plants by:
Answer: Reducing pore space, limiting root growth and gas exchange
Compaction crushes soil pores, restricting root penetration, oxygen availability, and water infiltration critical for plant health.
Which term describes the process of nutrients moving downward through the soil profile with water?
Answer: Leaching
Leaching is the downward movement of soluble nutrients (especially nitrates) through the soil profile, potentially into groundwater.