532 EXPERIMENT STATION RECOKD. [Vol.35 



average gains of from 2.3 to 3.2 bu. of corn, and with 50 lbs. of muriate of 

 l)ota,sh, from 2.1 to 5.1 bu. The average gain ascribed to barnyard manure was 

 from 8.3 to 11.5 bu. per acre, or larger than the gains from acid phosphate, 

 cotton-seed meal, or potash salt. 



Thomas phosphate used in 12 tests had about GO per cent of the effectiveness 

 of acid phosphate. In 11 experiments the pho.sphoric acid of rock phosphate 

 showed about 22 per cent of the effect of the phosphoric acid of acid phosphate. 

 With lime, used in 12 experiments, there was an average gain of 4.5 bu., but no 

 gain in one-half of the tests. When 50 lbs. of nitrate of soda was substituted 

 for 100 lbs. of cotton-seed meal in 49 experiments, the average difference in favor 

 of cotton-seed meal was about 1 bu. of corn per acre. Manure gave profitable 

 results in the greatest number of tests. Acid phosphate alone gave a large 

 number of profitable increases, and cotton-seed meal alone gave nearly the same 

 number. Cotton-seed meal with acid phosphate gave profitable results in 42 

 per cent of the trials. 



Tests of soy beans, 1915, E. H. Jenkins, J. P. Street, and C. D. Hubbeix 

 (Connecticut State Sta. Bui. 191 {1916), pp. 14, fig- i).— This bulletin presents 

 the data gathered in 1915 in continuation of earlier work (E. S. R., 32, p. 633). 



Twenty unnamed varieties of soy beans, chiefly new introductions grown in 

 cooperation with the U. S. Department of Agriculture, ranged from 97 to over 

 150 days in period of growth and from 19.3 to 31.2 bu. of seed per acre in yield. 

 The named varieties tested required from 6 to 15 days longer to mature, pro- 

 duced on the average 1,200 lbs. less of dry forage per acre, and the dry feed 

 contained about 1.1 per cent more protein, as compared with the results of the 

 same varieties in 1914. 



The range in yield per acre of 18 varieties grown in 1915 was from 5,672 to 

 22,477 lbs. of green forage and from 12.5 to 29 bu. of seed. The results of two 

 years' tests of those varieties which grew successfully in both years are reported 

 as indicating that Wilson, Ebony, and Cloud, small, black-seeded varieties, were 

 in both years among the six varieties yielding the most dry matter in the green 

 forage. Tables are given showing the yield and composition of soy-bean forage, 

 alfalfa, and ensilage corn as determined at the station, and the nutrients per ton 

 of ensilge corn, soy-bean forage, and mixtures of the two. It is stated that an 

 average crop of soy beans such as was grown by the station the past two years 

 contains, exclusive of the roots, approximately 4,2-55 lbs. of organic matter, 131 

 lbs. of nitrogen, 23 lbs. of phosphoric acid, and 93 lbs. of potash per acre. 



Results of field tests by farmers are briefly noted, and an outline is given of 

 a paper on soy beans as a food for diabetics, previously noted (E. S. R., 34, 

 p. 311). 



Tobacco experiments, 1913, W. Frear, O. Olson, and H. R. Kraybill (Penn- 

 sylvania Sta. Rpt. 1914 pp. S47-374, pls. 12). — The experiments here described 

 were conducted in cooperation with the U. S. Department of Agriculture and 

 with tobacco growers' societies in Lancaster, Clinton, and York counties in the 

 State. Experiments in Lancaster County were conducted to determine the most 

 productive strain of the Connecticut Seedleaf or Broadleaf variety. The collec- 

 tion of strains by elimination based on earlier resiilts was reduced to 10 in num- 

 ber. The object of the work in Clinton County was the determination of the 

 type of tobacco best adapted to the soil and climate of the Clinton-Lycoming 

 tobacco region. The experiments in York County were inaugurated during the 

 year to ascertain the cause of the decrease in burning quality of the tobacco 

 grown. Earlier and similar work with tobacco has been previously noted (E. 

 S. R., 34, p. 142). Meteorological data and notes on crop conditions, together 

 with results bearing on yield, plant measurement, and leaf quality, are presented 

 in tables. 



