OHIO. 177 



the variation in size of the kernel and the possibility of permanently 

 changing the size of the kernels by planting the small and large ker- 

 nels from the same head. 



In the project on the role of phosphoric acid and other mineral 

 elements, the nutritive value of different phosphorus compounds when 

 fed to swine was studied. The results, obtained thus far have con- 

 tributed materially to a knowledge of the subject, but further work 

 is required, tog'^ther with a greater' refinement and elaboration of 

 method than anyone has so far bestowed upon it. The methods for 

 the estimation of inorganic phosphorus in vegetable and animal sub- 

 stances, published in Bulletin 215 of the station, have received wide 

 recognition. Complete ash analyses of a considerable number of 

 foods and feeding stuffs were made, together with a continued searcli 

 for improved methods of chemical analysis. In connection with this 

 investigation, a review of the literature of phosphorus metabolism has 

 been undertaken. 



Under Hatch and other funds the chemist studied the effect of the 

 treatment of the different fertilizer plats on the composition of the 

 crops and published Bulletin 222 relating to this work on wheat. 

 Work in plant physiological chemistry included the study of the 

 absorption of plant nutrients by cereals, on which a report was pre- 

 sented in Bulletin 221 of the station. A study was also made of the 

 influence of the sulphur supply in the soil on the protein content of 

 leguminous plants. Cooperative analyses were made for the depart- 

 ments of agronomy, animal husbandry, horticulture, and soil fertility. 



In agronomy, cultural, plant breeding, and seed tests were con- 

 ducted with alfalfa, and varietal, cultural, and breeding work with 

 clover, corn, oats, and soy beans. Work with special forage crops in- 

 cluded a variety test with peas, beans, and millets ; tests of peas and 

 oats at different rates of seeding, and tests of various leguminous 

 plants, including special tests with hairy vetch seeded alone and with 

 rye. A comparison was made of 10 prominent meadow grasses, of 20 

 different crops and crop combinations seeded in corn at the last culti- 

 vation, and of live stock and grain farming. Wheat experiments 

 included one-tenth-acre plat tests of over 60 varieties and one-hun- 

 dredth-acre plat tests of over 100 varieties in pure-line strains. 



The department of animal husbandry continued the comparison of 

 corn and oats as feeds for work horses, and conducted an experiment 

 in fattening draft horses for market. Different proportions of grain 

 and roughage and a ration of corn and clover hay with one of corn, 

 cottonseed meal, and clover hay for beef production were compared. 

 A number of supplements were used in different proportions with 

 corn in dry-lot feeding of hogs and green feeds were compared with 

 each other and with dry feeds. The production of wool and mutton 



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