66 MASS. EXPERIMENT STATION BULLETIN 293 



changes until 1921. A variety of crops was grown, and tables show results obtained with 

 oats, soy beans, potatoes, hay, corn, and miscellaneous crops. The value of Field A to 

 agriculture is its history of the diversity of results. Back of any subsequent work upon 

 it are authentic records of each plot, of which no similar records were to be had when the 

 field was laid out. 



291 Two Systems of Feeding Dairy Cows: High Roughage and Low Grain 

 versus Low Roughage and High Grain. J. B. Lindsey and J. G. Archibald. 

 IS pp. December, 1932. 



The amount of grain to be fed to cows is a question of perennial interest to farmers, par- 

 ticularly in a state like Massachusetts where grain is bought outright, while roughage is 

 grown at home. Though much has been written on the subject, it has been largely opinion 

 unsupported by experimental evidence. This bulletin reports the results of a long-time 

 experiment (October 1, 1928 to March 31, 1932) conducted at this station. Viewing the 

 results as a whole, the low roughage group of cows had a rather better record. They looked 

 thriftier, put on more flesh, milked more freely, maintained their production better from 

 year to year, maintained their average test better, and were more nearly mormal in their 

 reproductive function. It was evident that cows will not produce to the limit of their ability 

 on a high roughage system of feeding. Which method of feeding will produce milk more 

 economically, however, depends very largely on local conditions as to production and mar- 

 kets, and in a large measure is a problem to be solved by the individual farmer. 



292 Carbon Disulfide Emulsion for the Control of the Root-Knot Nematode. 

 E. F. Guba. 16 pp. illus. December, 1932. 



Many greenhouse establishments lack the necessary means for sterilizing soil with steam 

 or hot water. Even where these methods are practiced with successful results, they are 

 laborious and slow and require expensive equipment. Experiments have been conducted 

 which show that the use of carbon disulfide emulsion as a soil drench in greenhouses can 

 be relied upon to greatly reduce the root-knot nematode as a factor causing crop loss, at 

 a cost of approximately $0,009 per square foot for chemicals. Carbon disulfide emulsion is 

 compatible with formaldehyde. A stock emulsion containing 68 per cent carbon disulfide, 

 26 per cent water, and 6 per cent rosin-fish-oil soap in a 1 :50 concentration for control- 

 ling the root-knot nematode, with the addition of 2/3 gallon of formaldehyde if soil- 

 inhabiting fungi are a factor, is effective. The addition of formaldehyde adds about $0,007 

 per square foot to the cost of the treatment. 



Control Bulletins 



62 Seed Inspection. F. A. McLaughlin and Margaret E. Nagle. 47 pp. Feb- 

 ruary, 1932. 



63 Twelfth Annual Report on Eradication of PuUorum Disease in Massachusetts. 

 H. Van Roekel, K. L. Bullis, O. S. Flint and Miriam K. Clarke. 80 pp. 

 September, 1932. 



64 Inspection of Commercial Feedstuffs. Philip H. Smith. 48 pp. September, 

 1932. 



65 Inspection of Commercial Fertilizers. H. D. Haskins. 50 pp. October, 

 1932. 



66 Inspection of Agricultural Lime Products. H. D. Haskins. 8 pp. Decem- 

 ber, 1932. 



Meteorological Reports 

 517 - 528, inclusive. Monthly reports giving daily weather records, together 

 w^ith monthly and annual summaries. C. I. Gunness. 4 pp. each. 



Reports of Investigation in Journals 



(Numbered Contributions) 



121 Putting First Things First in Agronomy. F. J. Sievers. Jour. Amer. Soc. 

 Agron. 24:29-32. January, 1932. 



122 The Effect of Environment on the Nematode of the Tomato Gall. Linus 

 H. Jones. Jour. Agr. Research 44:275-285. February 1, 1932. 



