Label Interpretation and Calculations 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 Label Interpretation and Calculations flashcards as text
A fertilizer label lists 'Water Insoluble Nitrogen (WIN): 5%' within a total nitrogen of 25%. What percentage of nitrogen is water soluble?
Answer: 20%
Water soluble nitrogen = total nitrogen minus WIN = 25% − 5% = 20%.
An applicator needs to apply 2 lbs of P2O5 per 1,000 sq ft using a 0-20-0 fertilizer. How many lbs of product are needed per 1,000 sq ft?
Answer: 10 lbs
2 lbs P2O5 ÷ 0.20 = 10 lbs of product per 1,000 sq ft.
What does the net weight statement on a fertilizer label legally represent?
Answer: The total weight of the product including all components
Net weight is the total weight of all product contents in the container, including fillers and carriers.
A turf manager reads a label that calls for 6 lbs of nitrogen per 1,000 sq ft per season, split into three equal applications. How many lbs of N per 1,000 sq ft per application?
Answer: 2 lbs
6 lbs ÷ 3 applications = 2 lbs of N per 1,000 sq ft per application.
A fertilizer label states 'For use on: ornamentals, turf, and vegetables.' An applicator wants to use it on a food crop orchard. Is this permitted?
Answer: No, 'food crop orchard' is not listed as a permitted use site
Applicators may only use fertilizers on sites specifically listed in the label's directions for use.
A fertilizer contains 8% sulfur. How many lbs of sulfur are applied when 25 lbs of product is spread per 1,000 sq ft?
Answer: 2 lbs
25 lbs × 0.08 = 2 lbs of sulfur applied per 1,000 sq ft.
When a fertilizer label lists 'Equivalent to X% P2O5,' why is phosphate expressed as an oxide rather than elemental phosphorus?
Answer: It is the standardized regulatory convention for fertilizer labeling in the US
US fertilizer regulations require phosphate to be reported as P2O5 equivalent, a standardized convention across all states.