Return to course: Fertiliser Equipment Performance Assessment
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Course Overview
Fertiliser Equipment Performance Assessment
Fertiliser equipment performance assessment
Why check equipment performance?
Types of application equipment
Factors affecting distribution
Assessing performance 1: Application Rate
Assessing performance 2: Spread Pattern
FertSpread On-Line Calculator
Broadcast Spreader Assessment
Placement Machine Assessment
Fertiliser Equipment Performance Assessment
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Fertiliser Equipment Performance Assessment
The spatial coefficient of variation (CV) describes how evenly fertiliser is applied.
What is the recommended maximum CV for nitrogen-based fertilisers?
*
5%
15%
25%
35%
95%
What is the maximum recommended CV for other types for fertiliser?
*
5%
15%
25%
35%
95%
Excessive variation can have a negative effect on:
*
Crop performance
Pasture performance
Profitability
the environment
All of the above
Excessive variation can increase the risk of leaching.
*
True
False
Which of the following affect the spread pattern of a broadcast fertiliser applicator?
*
shape and density of particles
evenness of particles in a batch
wind speed and direction
machine travel speed
the throw speed
machine discharge rate
Placement fertiliser machines include
*
Oscillating spouts
Drills
Planters
Side-dressers
The same BATCH of fertiliser can spread differently when the weather changes
*
True
False
Which of the following control the Application Rate of a placement machine?
*
Machine travel speed
Machine alignment – horizontal axes
Discharge door opening
Roller condition
Duct design and settings
Fan speed
Drop tube design and condition
Which or the following control the Spread Pattern of a placement machine?
*
Machine travel speed
Machine alignment – horizontal axes
Discharge door opening
Roller condition
Duct design and settings
Fan speed
Drop tube design and condition
Why can blended fertiliser products spread nutrients unevenly if a wide bout width is chosen?
*
The different fertilisers stick together
Their particles have different densities and shapes
They pass through the metering system at different speeds
Fertiliser ballistics start to become significant between
*
10-20 m/s
20-30 m/s
30-40 m/s
40-50 m/s
If you can see striping in a crop as a result of poor fertiliser application:
*
the CV is 20% and yield reduction is 20%
the CV is 20% and the yield reduction is 40%
the CV is 40% and the yield reduction is 20%
the CV is 40% and the yield reduction is 40%
If CV increases by two times, the yield loss increases by four times
*
True
False
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