Best Practices for Application Flashcards
7 cards from real CFA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Best Practices for Application flashcards as text
Which application method is most effective for reducing volatilization losses from urea fertilizer?
Answer: Incorporating urea into the soil or irrigating immediately after application
Incorporating urea into the soil or irrigating immediately after surface application moves it below the soil surface where it converts to ammonium and is retained, reducing ammonia volatilization.
What does a high cation exchange capacity (CEC) in soil indicate for fertilizer management?
Answer: The soil has greater ability to hold positively charged nutrients and resist leaching
High CEC soils can hold more positively charged cations like ammonium, calcium, and potassium, reducing leaching losses and allowing less frequent fertilizer applications.
An applicator is fertilizing an area next to a wetland. Which action is most appropriate?
Answer: Maintain the required buffer zone and use slow-release formulations
Near sensitive wetlands, applicators must maintain required buffer zones and should use slow-release formulations to minimize nutrient runoff into the wetland ecosystem.
What is 'fertigation' and what is one key benefit of this technique?
Answer: Injecting fertilizer into an irrigation system; it delivers nutrients precisely to the root zone
Fertigation is the injection of fertilizer into an irrigation system, which delivers soluble nutrients directly to the root zone with irrigation water, improving nutrient use efficiency.
Why is it important to record fertilizer application details including date, product, rate, and location?
Answer: Records support regulatory compliance, liability protection, and future nutrient management decisions
Detailed application records are essential for demonstrating regulatory compliance, protecting against liability claims, and making informed nutrient management decisions in subsequent seasons.
Which factor most strongly influences the rate at which a granular fertilizer dissolves and becomes available to plants?
Answer: Soil moisture and temperature
Soil moisture is required to dissolve granular fertilizer, and higher soil temperatures accelerate dissolution and microbial conversion of nutrients into plant-available forms.
What is the best approach when a soil test indicates very high potassium levels but low nitrogen?
Answer: Apply a nitrogen-only fertilizer to correct the deficiency without adding more potassium
When a specific nutrient is deficient and another is already at high levels, applicators should use a product that supplies only the deficient nutrient to avoid further imbalance.