652 EXPEKIMENT STATION EECORD. 



proved detrimental. Phosphates in nodular form were only slightly effective and 

 inferior in this respect to Thomas slag. On one of the soils j^otash salts proved bene- 

 ficial to the growth of the clover. As has been often observed, clover after clover or 

 alfalfa did not make a very good growth. 



Varieties of white clover, C. Fruwirth ( Fiihling' s Lcmdw. Ztg., 61 {1902), No. 24i 

 pp. 877-882). — The results of tests with Italian, Colossal Ladino, Solemacher, and 

 common German white clover carried on for several years are reported. The yields 

 are given, together with measurements of the leaf and stem of the different varieties. 

 The seed of the common German variety was larger and heavier than the seed of 

 any of the other varieties. As compared with the common German the other varie- 

 ties made a more luxuriant growth, blossomed later and less profusely, and pro- 

 duced larger quantities of green and air-dry substance and also of dry matter and 

 protein. These 3 varieties grew satisfactorily on sand and clay soils and were equally 

 hardy with the conunon German. The autlior found no perceptiVjle difference 

 1>etween these varieties, and regards all as belonging to the same form. 



Manual of corn judging, A. D. Shamel {Urlxnui, J II.: Author, 1902, pp. 36, 

 Jigs. 12). — The purpose of this manual is to assist and guide in the more systematic 

 study of the ear of corn. Among other points attention is given to standards of per- 

 fection, variety measurements, the score card and its use, tlie study of characteristics, 

 and the handling and testing of seed corn. 



Analyses of hop cones and hop vines, G. E. Colby [California Sta. Itpt. 1899- 

 1901, pt. 2, pp. 252-254). — Analyses of the ashes of hop cones, the ingredieiits of hop 

 ashes, the soil ingredients extracted by hop cones and hop vines, and analyses of 

 the soils of hop fields are talmlated. 



Experiments with yellow lupines, P. P. Deherain and E. Demoussy {Ann. 

 Agron., 28 {1902) No. 9, pp. 449-482, figs. ^) .^Observations on the growth and cul- 

 ture of yellow lupines during 6 years are reported. When grown in sand destitute of 

 humus, yellow lupines, although given commercial fertilizers and lime, either made no 

 growth or grew very poorly. Humus added to the soil under these conditions enabled 

 the plants to grow and flower and even to ripen their seed without the presence of 

 nodules on their roots. These plants grew without utilizing the nitrogen of the air, 

 but using the combined nitrogen in the soil just as is done by nonleguminous iilants. 

 Inoculating the roots with extracts from the nodules of alfalfa, hairy vetch, and 

 furze showed no effect. The lupines grew and jiroduced nodules in leaf mold which 

 had received commercial fertilizers, but a better growth was obtained in soil consist- 

 ing of sand with an addition of 10 per cent of leaf mold. An addition of lime to the 

 leaf mold caused a rapid destruction of the plants, and even in a good friable, calcare- 

 ous soil, although well supplied with barnyard manure, the plants did not live. 

 In a test with a noncalcareous soil the lupines grew fairly well when commercial 

 fertilizers were used, and in this case the phosphates gave particularly good results, 

 phosphate of potash and Thomas slag being the most effective. In this soil the 

 roots were found well covered with nodules. In another test with a strong soil low 

 in calcareous matter and obtained from a different locality, the ujiper portions of the 

 roots were very densely covered with nodules. From these results the conclusion is 

 drawn that the activity of the bacteria causing the nodules differs with the soil. At 

 Grignon yellow lupines on a good but rather light soil containing 4 per cent of lime 

 made a fair growth and ripened their seed, but no nodules were produced on the 

 roots. Inoculating soil at Grignon with soils in which \hv jdants were provided 

 with nodules di<l not give very good results. 



Variety tests of oats and potatoes, G. C. Watson and E. H. Hess {Penn-v/lvania. 

 Stu. lipt. 1901, pp. 223-234). — The results of tests with oatsandjiotatoesby the station 

 are sunnnarized and the methods of carrying on the work are described. 



OatH. — Of 19 varieties tested in 1900 the most productive were Sensation, Irish 

 Victor, Silver Mine, Henderson Clydesdale, and Heavy Weight Champion, yielding 



