Determination of the Duty of Water by Analytical Experiment

The purpose of this paper is to show the methods used in the determination of the quantity of water required for the growth of certain crops, where it was impracticable to measure it directly. This was done by analyses of the requirements and by the separate determination, by experiment, of the specific quantity required for the different parts which go to make up the whole use of water by the plant. The circumstances attending the investigation described herein were such as to open up a new field which is not covered to any great extent in available technical literature. The writer hopes that the description of his work in this case will bring forth discussion from others who may have treated this matter along similar or different lines, as this may broaden the scope of the litemtn1·c on this very important subject.