Excerpt from Chemical Investigations of the Tobacco Plant: The Effect Upon the Composition of the Tobacco Plant of the Form in Which Nitrogen Is Supplied
The agricultural problems presented by the use of nitrogen in one or other of these forms are very complex. Choice is dictated by the conditions in the soil which must be controlled, by the toler~ ance of the species to the soil conditions that are achieved, and also by the susceptibility of the species to diseases which may arise or which may be controlled by the soil conditions that are established. If these factors are successfully dealt with, an organism that is re~ garded as a normal plant results and the agricultural problem is, to this extent at least, solved.
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