Fertilizer Application Equipment 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 Fertilizer Application Equipment flashcards as text
What safety device is required on anhydrous ammonia (NH3) nurse tanks to prevent overpressure?
Answer: A pressure relief valve
Pressure relief valves are mandatory on NH3 tanks to vent excess pressure safely, preventing catastrophic tank failure.
In fertigation (applying fertilizer through an irrigation system), what equipment is used to inject liquid fertilizer into the water stream?
Answer: Chemical injector pump or venturi injector
Injector pumps or venturi injectors introduce precise amounts of liquid fertilizer into the irrigation water flow for uniform delivery to plants.
Why is it important to check the uniformity of fertilizer particle size (granulation) before loading a spinner spreader?
Answer: Inconsistent particle sizes cause uneven spread patterns because large and small granules travel different distances
Granules of different sizes and densities exit the spinner at different trajectories, resulting in an uneven distribution pattern across the spread width.
What is the main reason for using a section control system on a liquid fertilizer boom sprayer?
Answer: To automatically shut off boom sections over previously applied areas and field boundaries to prevent overlap and waste
Section control automatically disables individual boom sections when GPS detects the sprayer is over an already-treated area or outside the field boundary, reducing waste and over-application.
When calibrating a liquid boom sprayer, what is the correct formula to calculate actual application rate in gallons per acre (GPA)?
Answer: GPA = (GPM per nozzle x 5,940) divided by (Ground speed mph x Nozzle spacing inches)
The standard calibration formula GPA = (GPM x 5,940) divided by (MPH x nozzle spacing in inches) accounts for all variables affecting liquid application rate.
What personal protective equipment (PPE) is specifically required when handling concentrated liquid fertilizer during equipment loading?
Answer: Chemical-resistant gloves, eye protection, and appropriate protective clothing
Concentrated liquid fertilizers are corrosive and require chemical-resistant gloves, eye protection, and protective clothing to prevent skin and eye injury.
What does the term 'effective spread width' mean when calibrating a spinner spreader?
Answer: The usable working width where fertilizer is applied with acceptable uniformity, used to set driving lanes
Effective spread width is the zone of acceptable uniformity (typically within 10-15% of target rate) used to determine proper driving lane spacing during application.