Statistical analysis is also explained carefully, while noting that any bias invalidates the results. It also gives tips on publishing findings.
Where different experimental techniques can be used, each method is provided, together with any precautions, drawbacks and advantages outlined.
Yes, this wee gem of a book is in imperial measurements (not many people even know what a 'link' is these days) but what it contains is still so relevant for researchers and interested farmers.
Advances have been made with regard to the equipment used, but the basic principles, the fundamental science, still stand.
In preparation for converting this publication to an online version, I was required to proof read it several times.
I found it an easy read, with the scientific thought explained in layman's terms.
All the methods are carefully explained, even mentioning what to do when mistakes are made ("the fact must be carefully and fully noted").
I cannot praise this publication enough. It should be essential reading for all research students, agronomists and interested farmers.
I am delighted the Fertiliser Quality Council took the time to resurrect and publish it online It had been revised and printed in Bulletin No399 of the New Zealand Department of Agriculture in 1966, but was hard to find.
Now it is freely available and can be downloaded at http://fertqual.co.nz/
- Ann Thompson is an executive director of the Fertiliser Quality Council