Return to course: Run an on-farm fertiliser rate trial
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Course Overview
Run an on-farm fertiliser rate trial
The 10 point plan
The On-Farm Trial Guide
The 10 point plan
Getting the concepts right
Getting the treatments right
Getting the measurements sorted out
Getting the design right
Getting the site right
Getting the trial underway
Monitoring the trial
Finishing the trial
After the trial
Analysing the trial results
Recording results and conclusions
Running a fertiliser rate trial
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Running a fertiliser rate trial
The first step in the 10 point plan is
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Getting the site right
Getting the design right
Getting the concepts right
Getting the trial underway
When writing down what you want to learn from your trial, you should
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Have a good paragraph explaining the things you want to learn
Try and write it in a short sentence
Make a list of the measurements you will make
It is better to get a trial underway than fluff about worrying about the measurements you will make
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True
False
Head-to-head trials are good because you get a simple A-B, old-new comparison that you can put into action
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True
False
A good rule of thumb for fertiliser rate trials is to use rates that differ by
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About 10%
No more than 20%
At least 20%
At least 20 kg
When changing the fertiliser rate in a trial, you should also change the population to keep things the same
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True
False
A general soil fertility test is an essential part of a nitrogen fertiliser rate trial
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True
False
Trial measurements should be made
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Before starting the trial
During the growth of the crop
At harvest – the end of the trial
After the trial has been harvested
Quantitative measurements that give actual numbers which can be used for ANOVA statistics are known as
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Hard measurements
Soft measurements
Qualitative measurements
The purpose of replication is to
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select sites relevant to your property
increase certainty when making comparisons
match the trial design to the trial site
Ensure each treatment has equal chance of being in good or no- so-good areas
Replication is like a sports competition where each team meets each other team for several matches.
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True
False
Using five, rather than four, replicates will give 25% more work but only 15% more precision
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True
False
When setting out a trial, arrange treatments that place blocks along the soil variation and then arrange plots across the variation.
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True
False
If space is limited, it is better to have larger plots than more replicates
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True
False
Harvest widths should be narrower than plot widths
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True
False
If doing a nitrogen rate trial on a tight budget, it is a good idea to
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get a full soil test for every plot
get a nitrogen test for every plot
get a full soil test for the whole site
get a nitrogen test for the whole site
In general, soil fertility tests should be done
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at least a month before planting
less than a month beofre planting
a week before planting
as near planting as possible to ensure soil is fresh
If equipment has calibrated, you can be sure the right rate was applied to your trial
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True
False
If you see interesting or unusual differences in your treatments, you should try to get objective measurements
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True
False
When harvesting a fertilier rate trial, you should AVOID collecting samples (pick 3)
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along the plot edges
in the centre of the fertiliser applicator path
if the plants in an area look burnt
areas of damaged plants
plants that look yellow
You must measure the length and width of the area you harvest, as well as the weight of material harvested
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True
False
If you find data is missing, you can replace up to 25% with average values from the remaining plots in the same treatment
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True
False
Which of the following statements are true?
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A P-value of 0.05 means that there’s a 5% chance that the observed difference between treatment A and B was just luck
A P-value of 0.95 means that there’s a 95% chance that the observed difference between treatments A and B was caused by the treatments
The LSD lets you see whether two numbers really are significantly different from one another
If the difference between your treatment averages is less than the LSD, you can be confident your treatments really are different.
Which of the following statements are true?
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ANOVA Tool gives an interpretation of the P value and LSD
ANOVA results can only look into the past, not the future
ANOVA results cannot tell you what would happen if you did the trial again
ANVOA results apply regardless of the conditions in which the trial was conducted
ANOVA results do not give information about why results occurred; only what results occurred
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