1918] FIELD CROPS. 231 



A feeding analysis shows the nutritive ratio of shaftal to be 1 : 3.2 and that of 

 alfalfa 1:3.5. 



Comparative value of legumes as green manures, M. O. Johnson, Aiice R. 

 Thompson, and C. A. Sahr {Hawaii Sta. Press Bui. 52 {1911), pp. IJf, fajs. 6). — • 

 This is a popular discussion of the studies of leguminous crops for green 

 manuring purposes in Hawaii previously noted (E. S. R., 37, p. 320). 



Soy beans and cowpeas, J. R. Fain and P. O. Vanatter {Go. State Col. Agr. 

 Circ. 46 {1917), pp. 8). — A brief popular description of soy beans and cowpeas, 

 together with cultural directions, recommendations as to varieties, and notes 

 on the utilization of the crops. 



Field production of yautias, g'abis, and dasheens, G. O. Ocfehia {Philip- 

 pine Ayr. and Forester, 5 {1916), No. 7, pp. 223-23Jf) .—This reports cultural 

 tests with the crops named under conditions prevailing in the Philippine 

 Islands. A brief review is given of cultural practices in the United States, 

 Porto Rico, Hawaii, Barbados, New Caledonia, Haiti, and Malaysia. 



[Variety tests with alfalfa], W. P. Brooks and E. F. Gaskill {Massacfiu- 

 setts Sta. Rpt. 1916, pp. 57a, 5Sa). — Continued tests of alfalfa varieties have 

 led to the conclusion that common alfalfa from northern-grown seed is equal 

 to the higher-priced Grimm, both in yielding power and in resistance to winter- 

 killing. Siberian alfalfa obtained from South Dakota winterkilled. 



Barley, J. T. Pkidham {Dcpt. Agr. N. S. Wales, Farmers' Bui. 112 {1916), 

 pp. 3-22, figs. 7). — The cultivation and handling of barley in New South Wales 

 is dfscussed in a general manner, together with an economic di-scussion by 

 J. R. Davidson, of the production of malting barley. 



The production of clover seed under irrigation in southern Idaho, L. C. 

 AiCHEE {Idaho Sta. Bui. 100 {1917), pp. 19, figs. 9).— Cultural methods and 

 field practices employed in the production of clover seed under irrigation in 

 southern Idaho are discussed in detail. Clover seed is now produced from 

 Washington County on the western border to Teton County on the east, with a 

 range in elevation of from 2,200 to 5,500 ft. Practically all Idaho-grown clover 

 seed is bought by eastern seed houses to blend with eastern- and foreign-grown 

 seed because of its high color, purity, and vitality, factors said to be greatly 

 influenced by the methods employed in its production. Yields of seed have 

 varied from 4 to 8 bu. per acre for red clover, 6 to 7 bu. for alsike, and 6 to 

 6.6 bu. for white clover for 1914 to 1916, inclusive, and for different sections of 

 the State. Cooperative action on the part of Idaho seed growers to encourage 

 the sale of straight Idaho-grown seed in the United States is urged. 



Increasing the yield of corn by crossing, D. F. Jones, H. K. Hayes, W. L. 

 Slate, jr., and B. G. Southwick {Connecticut State Sta. Rpt. 1916, pt. 5, pp. 

 3S3-347, pis. 2).- — Extensive investigations with 50 first-generation hybrids of 

 the highest-yielding varieties of flint and dent corn in Connecticut are reported 

 in a continuation of work previously noted (E. S. R., 31, p. 331). The experi- 

 ments were conducted cooperatively by the State and Storrs stations at Mt. 

 Carmel and Storrs in 1914 and 1915 and at Mt. Carmel in 1916. The behavior 

 of the first-generation cros.ses as compared with their parents is outlined and 

 tabulated data presented showing the yields, the heights, and the number of 

 days to tasseling and to maturity. The desirable crosses are noted and the 

 general characters and special features of the hybrids discussed in detail. 



The results, together with those obtained elsewhere, are deemed conclusive 

 as to the value of crossing, without previous inbreeding, as a method for 

 increasing the yield of corn. It is stated that of the 50 Fi crosses, " 88 per 

 cent yielded more than the average, and of these 66 per cent yielded more than 

 either parent. In time of ripening the first-generation crosses were on the 

 average intermediate when compared with their parents. . . . This increase in 



