14 X. H. Agri. Experiment Station [Bui. 296 



to utilize it. The check plot with no treatment at all yielded 1253 

 pounds. 



Complete fertilizers on similar plots yielded about 800 pounds more 

 per acre than nitrogen carriers alone. 



Spring treatment with either nitrogen or complete fertilizer consider- 

 ably out-yielded fall treatment except that with cyanamid there was 

 relatively little difference. Response from phosphorus seems to be 

 greater than from potash on these soils. {Hatch Fund) 



Time of Cutting Hay 



The plots started in 1930 are still being kept in their original loca- 

 tion to determine the continued effect of cutting at different dates on 

 timothy stand. 



There is some variation in yield from year to year due to rainfall, 

 report F. S. Prince and P. T. Blood. There is also some variation from 

 year to year in protein percentage, but the data within the year has 

 been remarkably consistent. 



Cuttings every ten days from June 10 to July 30 showed decreasing 

 yields in pounds of protein per acre, ranging from 210 to 140 pounds. 

 This is in spite of the fact that the total yield of hay per acre increased 

 from 2008 to 2891 pounds. (Hatch Fund) 



Corn Variet)'' Test 



Forty-nine corn varieties planted on the Ireland farm in Greenland 

 in 1936 showed descending weights ranked as follows: Improved 

 Leaming, 21.78 tons, green weight per acre; Early Eureka Ensilage, 

 20.96 T; Sure Crop (Originator's strain), 19.43 T; Tuxpan, 19.30 T; 

 Pamunkey Ensilage, 19.29 T; Virginia Eureka, 18.77 T; Kato, 18.06 T; 

 Southern Hybrid Sweepstakes, 17.88 T; Canada Leaming Hybrid, 

 16.81 T; Golden Queen, 16.19 T. The work was in charge of L. J. 

 Higgins. {Hatch Fund) 



Metabolism of Lactating Cows 



The physiological phase of the nutrition studies conducted by E._ G. 

 Ritzman in cooperation with F. G. Benedict of the Carnegie Institu- 

 tion of Washington was continued with a study of the basal metabolism 

 of the dairy cow when secreting milk, the object being to determine the 

 effect of this lactation on tissue stimulus. In four respiration experi- 

 ments with two cows the daily heat production was a little over 10,000 

 calories on the fourth day of fast. Previous to the fast each cow was 

 yielding slightly over 10 kgs. of milk, but on the fourth day without 

 food when they had reached the fasting state the secretion of milk had 

 almost ceased. This suggested that secretion of milk involves a stim- 

 ulus not only of the lactating gland, but also of the body tissue in gen- 

 eral. {Purnell and Miscellaneous Income Funds) 



Balanced Rations for Dairy Cows 



Five complete balances were carried out with two lactating Holstein 

 cows to determine the adequacy of protein and more particularly of 



