CFA Interpreting Fertilizer Labels 3

Question 1

A 50-lb bag of 15-5-10 fertilizer is purchased. How many pounds of potash (K2O) does the bag contain?

Accepted Answer

10 lbs

Answer

K2O is the third number: 10% of 50 lbs = 5 lbs — wait, 10% × 50 = 5 lbs; correct answer is 5 lbs.

Question 2

Which statement on a fertilizer label indicates that a product has been registered with the state department of agriculture?

Accepted Answer

The registration or license number

Answer

A state registration or license number on the label confirms the product has been approved for sale by the state's department of agriculture.

Question 3

If a fertilizer label says '46-0-0 urea,' what does the zero in the phosphate position confirm?

Accepted Answer

No phosphate (P2O5) is present in the formulation

Answer

A zero in the grade means that nutrient is absent from the formulation; urea is a straight nitrogen source with no phosphorus or potassium.

Question 4

The label on a liquid fertilizer states 'weight per gallon: 11.0 lbs.' How is this figure used in the field?

Accepted Answer

To calibrate application equipment from volume-based flow rates to weight-based nutrient rates

Answer

Weight per gallon allows applicators to convert a volume-based equipment setting into actual pounds of nutrient applied per acre.

Question 5

A label includes the phrase 'keep out of reach of children' in the precautionary statements. Under which federal act is this wording required?

Accepted Answer

Uniform State Fertilizer Bill (USFB) model law

Answer

The Uniform State Fertilizer Bill model law, adopted by most states, requires precautionary statements including child safety warnings on fertilizer labels.

CFA Practice Test

CFA Practice Test

CFA Interpreting Fertilizer Labels 3