No. 2. March, 1921] AGRONOMY 97 



642. Popp, M., AXD R. Floss. Das Susspressfutter als Futter fur Milchvieh. [Sweet 

 silage as feed for milk cows.] Mittheil. Deutsch. Landw. Ges. 35:391-394. 1920.— The 

 authors describe an experiment with a form of ensilage, the making of which is said to have 

 been developed in Switzerland. The process is not described in detail, but the reader is 

 referred to previous papers. In the experiments reported in this paper rowen was used 

 from a grass meadow. One portion of the rowen was made into hay, and the other put into a 

 silo under pressure. The feeding experiment was carried on for varying periods, using the 

 hay and the sweet silage from the same rowen grass. Analyses showed that the fat content 

 and the crude protein content were the same for both hay and silage. The pure protein and 

 the digestible protein were, however, greater in the hay; while the amides increased in the 

 silage. — The cows gave more milk from the silage than from the hay; and even after the 

 supply of silage was exhausted, the cows that had been fed on it appeared to retain the 

 increased milk flow. The making of sweet silage is highly recommended by the authors.— 

 A. J. Pieters. 



643. Pridham, J. T. Breeding cereals at the experiment farms. Agric. Gaz. New South 

 Wales 31 : 697-698. 1920.— See Bot. Absts. 7, Entry 926. 



644. Renson, Carlos. Cultivo de la papa. [Potato cultivation.] Bol. Camara Agric. 

 Nacion. Leon [Mexico] 7:467-471. 1920. 



645. Renson, Carlos. Cultivo de la papa. [Potato cultivation.] Jalisco Rural [Mexico] 

 2:147-153. 1920. 



646. Revent6s, Jaume. La soja. [The soy bean.] Rev. Inst. Agric. Catalan de San 

 Isidro. 69:65-68, 81-85. 1920.— The author gives analyses of the beans, considers their 

 food value, uses of the oil and commercial products derived from them. — John A. Stevenson. 



647. RoBisoN, W. L. Com by-products for swine. Monthly Bull. Ohio Agric. Exp. 

 Sta. 5^:247. 1920. 



648. Rumsey, H. J. Seed growing in Australia. Seed World S^: 27-28. 1920. 



649. Russell, E. J. The nations food. [Rev. of: Rew, R. H. Food supplies in peace 

 and war. vii + 183 p. Longmans, Green and Co.: London, 1920.] Nature 105:320-321. 

 1920. 



650. Russell, E. J. British crop production. Nature 105: 176-178; 206-208. 1920.— 

 A discussion of means of increasing production. Data of yields, cost of production, ferti- 

 lizers, etc. — 0. A. Stevens. 



651. Russell, E. J. Wheat and wheat growing. [Rev. of: Buller, A. H. R. Essays 

 on wheat, xv + 339 p. The Macmillan Co.: New York and London, 1919.] Nature 105: 

 224-225. 1920. — Reviewer finds it a very interesting history of wheat in Canada.— 0. A. 



Stevens. 



652. Sanchez, A. Algunos dates sobre el cultivo del maguey. [Notes on the cultivation 

 of maguey.] Rev. Agric. [Mexico] 5: 227-228. 1919.— Agave sp. 



653. Sanchez, N. El cultivo de la papa. [Potato cultivation.] Rev. Agric. [Mexico] 5: 

 267-269. 1919. 



654. Scott, J. M. Forage crops in the South. Seed World 8i:40. 1920. 



655. Sheehan, B. F. Dodder in Idaho. Seed World 8^: 26-28. 1920.— In this article 

 the author discusses dodder as a noxious weed pest, threatening the small seed industry of 

 Idaho. The methods of dissemination of the seed and the plant, its appearance, and methods 

 of eradication in the field, are given, together with some notes upon the principal kinds of 

 dodder.— M. T. Munn. 



