1917] FIELD CROPS. 831 



New rice varieties, B. Mabcabeixi {Gior. Risicolt., 7 (1917), No. 1-2, pp. 

 4-10, figs. 2). — Two rice selections designated as Originario P. 7 and O. P. 6, 

 developed by F. Sancio in the Province of Santhia from seed of Chinese origin, 

 are described in detail. These strains are recommended as being of superior 

 market quality. Data are presented in tabular form comparing them with the 

 original. 



Sweet clover (Melilotus), H. L. Fulmeb {Ontario Dept. Agr. Bui. 235 (1916), 

 pp. 32, figs. 10). — The value of sweet clover (Melilotus) as a pasture, hay, and 

 soil improvement crop is discussed at some length. 



A number of original analyses are presented showing (1) the composition 

 of sweet clover at different stages of growth, (2) the yield and composition of 

 sweet clover hay as compared with alfalfa, red clover, alsike, and timothy, (3) 

 the dry matter and fertilizing constituents found In the tops (stems and leaves) 

 and roots (in first foot of soil) and in the total crop at two different stages of 

 growth and on two types of soil, (4) the composition of sweet clover and digesti- 

 bility of its protein from two different types of soil and at six different stages 

 of maturity, and (5) the total weight of nutrients and the amount of digestible 

 protein furnished by one acre of sweet clover at six different stages of maturity. 



Fertilizing the wheat crop, C. E. Thorne (Mo. Bui. Ohio Sta., 2 (1917), 

 Nos. 7, pp. 215-218, fig. 1; 8, pp. 251-253).— The results of experiments pre- 

 viously reported with acid phosphate, steamed bonemeal, and raw rock phos- 

 phate used with fresh stable manure as fertilizers for wheat are briefly noted 

 to illustrate the value of phosphatic materials in increasing wheat production, 

 and the value of fresh manure reenforced with a phosphorus carrier as a sub- 

 stitute for high-priced commercial carriers of nitrogen and potash. The rela- 

 tive importance of the phosphorus was shown by an increase valued at only $11 

 per acre where phosphorus was omitted, the nitrogen and potassium carriers 

 remaining unchanged, as compared with an increase amounting to $39 upon 

 the addition of acid phosphate valued at $2.60. 



Acid phosphate versiis raw phosphate rock — relative prices will determine 

 the choice for wheat this fall, C. G. Williams (Mo. Bui. Ohio Sta., 2 (1917), 

 No. 8, pp. 249, 250). — The relative value of raw rock phosphate and acid phos- 

 phate for wheat is briefly considered in the light of experiments previously 

 noted (E. S. R., 31, p. 217). The more profitable return in these tests was 

 obtained from the investment in acid phosphate. 



Adzuki beans and jimson weeds. — Favorable class material for illustrating 

 the ratio of Mendel's law, A. F. Blakeslee and B. T. Avery (Jour. Heredity, 

 8 (1917), No. 3, pp. 125-131, figs. 4).— The authors discuss the adaptability of 

 the adzuki bean (Phaseolus mungo) and the jimson weed (Datura stramonium 

 and D. tatula) as material for illustrative purposes in classes in genetics. 



The closeness of the ratios to expectations in the jimson weed is indicated 

 in summarized data on pigmentation and capsule characters obtained in con- 

 nection with other studies. A study of variability in jimson weed is being 

 made by the senior author. 



The Canadian Seed Growers' Association and its work (Ottawa: Associa- 

 tion, pp. 8, figs. 2). — This is a brief outline of the organization, purpose, and 

 methods of procedure of the Canadian Seed Growers' Association, together with 

 brief descriptions of some of the more important varieties of wheat, oats, barley, 

 and peas distributed. 



A method for determining the impurity of cereals caused by the seed of 

 Agrostemma githago, A. Ainata (Janata) (luzh. Russ. Selsk. Khoz. Oaz., 17 

 (1915), No. 47, pp. 6-8; abs. in Internat. Inst. Agr. [Romel, Internat. Rev. 

 Sci. and Pract. Agr., 7 (1916), No. 9, pp. 1272, 1273).— A total of 1,S20 seeds of 



