In practical agriculture it is essential when making investigations and experiments to keep in mind the need of the farmer: i.e. - that the investigations and experiments be conducted in such a way that truly sound and reliable results may be secured. If the information given to the farmer is misleading, i.e. the experiment or investigation fails to obtain the truth, then the farmer who heeds erroneous instructions must lose accordingly. The object of this article is to criticise the half field method of conducting manurial trials on grass. The advantages of the method are mentioned, and a scheme suggested to supplement it so that reliable information might be obtained.