FIELD CROPS. 433 



Culture experiments with bacterial inoculations of lupine and alfalfa, C. 

 Bartiii:l [Mcddcl. Ccnirahnist. Forsoksv. Jordbiiikaoiiiidiht, Xo. 95 {liU.'t), 

 pp. 32, p/.s\ 2; K. LaiuUbr. Aknd. llamll. och Tklskr., 53 (WW, ^'o. //, pp. 2J}1- 

 280). — Different methods of preparing pure cultures of nitrogen-fixing bacteria 

 for various legumes are discussed and results of field applications of various 

 commercial forms of pure cultui-es and of soil containing the desired bacteria 

 are given. Work for 1911, 1912, and 1913 is reported. In general the method 

 of using soil containing bacteria showed better results in larger yields of green 

 forage than did the use of azotogeu or Barthel's culture. 



A statistical study of barley at the Dickinson (N. Dak.) substation, J. A. 

 Clark (Jour. Aiiicr. Snc. Ayron., 6 (7.0/.)), No. //-5, pp. 171-190).— The experi- 

 ments discussed are cooperative between the Office of Cereal Investigations of 

 this Department and the North Dakota Experiment Station, and are for the 

 purpose of determining the relative yielding power of different varieties and to 

 find i-easous for the existing variations in yields between the different groups 

 of varieties of the same cereal. Both plat and nursery experiments are 

 reported. 



The work centers around three groups of varieties, 2-rowed hulled, 6-rowed 

 hulled, and 6-i'Owed naked, and covers several years. In discussing the annual 

 and average .vields of three varieties of barley representing the three groups, 

 respectively, for eight years, 190G-191.'>, as representing the results of plat ex- 

 periments, it is stated that the 2-row variety outyielded the 6-row variety in all 

 years, and the naked variety in all years except 1906. It had an average yield 

 of 34.2 bu. compared with 26.1 bu. for the 6-row variety and 25.6 bu. for the 

 naked variety. 



In the nuri^ery work it is shown that for a five-year period the mean yield of 

 the 2-rowed hulled group of barley etiualed 29t>.2±T.4 gm. and the next highest 

 yielding group, the 6-rowed hulled barleys, had a mean yield of 207.1±5.7 gm. 

 The naked group had the lowest yield, 204.7±5.1 gm. The yields of straw are 

 given as 597.6±10.5, 389.7±1S.2, and 400.7±9.3 gm., respectively. From the 

 data given there appears to be little or no advantage for any one of the three 

 groups in regard to the percentage of grain. 



Height of plants, beads per plant, length of head, and growing period in days 

 were studied and comparisons made as to yield factors. The following sum- 

 mary is given as a result of this stati.stical study of barley : 



" The 2-row hulled group exceeds the 6-row hulled group in yield of grain by 

 43 per cent ; in yield of straw by 49.1 per cent; has no significant difference in 

 percentage of grain in plant or in height of plant ; produces per plant 51. .5 per 

 cent more heads, of 55 per cent greater length, and requires a growing period 

 7.3 per cent longer. The 2-row hulled group exceeds the 6-row naked group by 

 44.7 per cent in yield of grain and 53.3 per cent in yield of straw; has no sig- 

 nificant difference in percentage of grain in the plant; produces (67.8 per cent 

 more heads, averaging 40.9 per cent longer, and has a growing period 7.1 per 

 cent longer. On the other hand, the plants of the 6-row naked group average 

 G.9 per cent taller than those of the 2-row hulled group. The 6-row naked group 

 has plants S.l per cent taller and heads 10 per cent longer than those of the 

 Grow hulled group. 



" The greater yield of both grain and straw in the 2-row hulled group is ac- 

 counted for, in part, by the greater number of heads per plant, the longer heads, 

 and a longer growing period. The greater number of heads per plant is consid- 

 ered the most important factor." 



Notes on the selection of maize at Cambodia, M. de Flacourt (Bui. Econ. 

 Indochine, n. ser., 17 {191-)), Xo. 107, pp. 215-21S). — This article discusses work 



