Running a fertiliser rate trial

The first step in the 10 point plan is *

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 *

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 *

True

False

Head-to-head trials are good because you get a simple A-B, old-new comparison that you can put into action *

True

False

A good rule of thumb for fertiliser rate trials is to use rates that differ by *

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 *

True

False

A general soil fertility test is an essential part of a nitrogen fertiliser rate trial *

True

False

Trial measurements should be made *

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 *

Hard measurements

Soft measurements

Qualitative measurements

The purpose of replication is to *

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. *

True

False

Using five, rather than four, replicates will give 25% more work but only 15% more precision *

True

False

When setting out a trial, arrange treatments that place blocks along the soil variation and then arrange plots across the variation. *

True

False

If space is limited, it is better to have larger plots than more replicates *

True

False

Harvest widths should be narrower than plot widths *

True

False

If doing a nitrogen rate trial on a tight budget, it is a good idea to *

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 *

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 *

True

False

If you see interesting or unusual differences in your treatments, you should try to get objective measurements *

True

False

When harvesting a fertilier rate trial, you should AVOID collecting samples (pick 3) *

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 *

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 *

True

False

Which of the following statements are true? *

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? *

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

Run an on-farm fertiliser rate trial

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