Address all correspondence, not to individual members of the staff, but to the NEW YORK AGRICULTURAL EXPERIMENT STATION, GENEVA, N. Y.

The Bulletins published by the Station will be sent free to any farmer applying for them.

*Connected with Grape Culture Investigations. On leave in military service

1. The experience with crop production herewith recorded covers seventeen years of observation, and the data herein given may be regarded as a report of progress.

2. The experiment was extended thru four years of rotations of four years each, the crops being corn, oats, wheat and grass, in the order named. On four of the plats, covering the four methods of treatment, clover was included in the rotation, and on the other four plats, receiving entirely similar treatments, timothy was inIcluded in the rotation.

3. The points concerning which conclusions more or less definite may be drawn are the following:

The relative production of crops with farm manure, complete commercial fertilizer and acid phosphate which was supplemented by a small application of sodium nitrate.

A comparison of farm manure and complete commercial fertilizer.

The influence of clover as a factor in fertility.

Soil analysis as a means of measuring fertility.

The relative profitableness of the several methods of treatment. 4. The largest yield of crops, measured in terms of dry matter, was with farm manure altho this did not greatly exceed the production with complete commercial fertilizer. Both the farm manure and the complete commercial fertilizer produced approximately 56 per ct. more dry matter than the plats receiving no fertilizer. The plats receiving phosphoric acid with partial nitrogen and no potash produced about 33 per ct. more than the untreated plats.

5. The production of dry matter with the farm manure and complete commercial fertilizer was in the proportion of 118.3 for the former to 113.9 for the latter. If, however, allowance is made for