ANNUAL REPORT, 1935 29 



material has been continued. A method now being developed is believed to 

 be an improvement on those now in use. 



Nitrogen Fixation in the Presence of or as a Result of the Growth of 

 Legumes Versus non-Legumes under Certain Defined Agronomic 

 Conditions. (F. W. Morse.) Oats and field peas were grown together on 

 the legume sections and oats alone on the non-legume sections. Nitrogen was 

 applied to Plots 5, 8, and 10. Oats responded to nitrogen more than oats and 

 peas and excelled in dry matter, but without nitrogen oats produced less dry- 

 matter than oats and peas. The results of 12 years (1924 to 1935 inclusive) 

 have been prepared for publication in a station bulletin. 



On the plots without nitrogen fertilizers since 1882, the continuous cropping 

 with non-legumes for 12 years has reduced the fertility of the soil; on the 

 other hand alternation with legumes has not increased it. The average annual 

 production of dry matter on the non-legume sections is on a lower level than 

 on the legume sections. 



Chemical Study of Cranberries. (F. W. Morse.) Work on this project 

 has been devoted to improving the method for the determination of quinic acid. 



A Study of the Availability of Soil Potash with the Object of Develop- 

 ing a System of Diagnosis for the Soils of the State. (F. W. Morse.) 

 This project was completed with the publication of Bulletin 324 in August. 



The Carbohydrates of Kentucky Blue Grass. (Emmett Bennett.) The 

 carbohydrates present at different periods of growth are being determined in 

 order to ascertain the transformations which these fractions may undergo 

 during the life of the grass. 



In addition to the identification and determination of some of the more 

 common sugars and complex polysaccharides, identification tests are being 

 made for one uncommon free sugar found to be present. One hemicellulose 

 has been isolated and is now being investigated in an attempt to identify the 

 hydrolytic products. 



The Nutritive Value of Fishery Products as Human and Animal 

 Foods. (W. S. Ritchie and C. R. Fellers. Cooperative with Horticultural 

 Manufactures. ) Under this project a rather complete study is being made of 

 the chemical composition and nutritive value of the haddock as affected by 

 commercial processing. The samples are being obtained through the coopera- 

 tion of the Birdseye Frosted Foods Sales Corporation, and represent four 

 different conditions: fish frozen with dry ice immediately after catching, the 

 whole fish frozen at the pier, and commercial fillets prepared by the so-called 

 quick and slow methods of freezing. Nutritional studies are being made of 

 these samples to determine their value tor growth, reproduction, and lactation, 

 using the albino rat. Determinations of ammonia, total protein, water soluble 

 and insoluble protein, fat, and total ash are made on current samples. Samples 

 are being saved for the determination of certain of the inorganic constituents. 



The Vitamin A Content of Certain Pasture Grasses. (W. S. Ritchie 

 and J. G. Archibald. Cooperative with Animal Husbandry.) The grasses 

 used for the vitamin assay were grown under different soil and fertilizer condi- 

 tions by the Animal Husbandry Department, the Chemistry Department 

 making the bio-assay. Twenty-one samples of grasses were used in making 

 the assay, which at present does not indicate a great variation in the vitamin 

 A content under the conditions of the investigation. 



