66 AGRONOMY [Bot. Absts., Vol. X, 



402. Ratzbr, Wilhelm von. Esparcette (Onobrychis sativa). Bieneh-vater 53: 64-65. 

 1921. — The article gives details of growth, blooming period, type of soil required, etc., of the 

 above species. Sanfoin can be grown successfully as far north as the 66th parallel in 

 Europe. It is very valuable for various purposes, such as increasing the productivity of 

 the soil, as hay, and for its excellent light-colored honey. — M. G. Dadant. 



403. Roberts, Herbert F. Relation of hardness and other factors to protein content of 

 wheat. Jour. Agric. Res. 21: 507-522. PL 100, 2 fig. 1921. — A study of available data shows 

 that the correlation between hardness of wheat and protein content is practically nil; this is 

 contrary to common assumption. No correlation is found between specific gravity and protein 

 content nor between volume of the grain and protein content. — D. Reddick. 



404. RtJMKER. Winterweizenversuche der Preussischen Forschungsgesellschaft fiir 

 Landwirtschaft-Berlin in Emersleben 1919-20. [Winterwheat experiments of the Prussian 

 Agricultural Research Society in Emersleben 1919-20.] Illus. Landw. Zeitg. 41: 185-186. 

 1921. — A brief report is made of field tests of 40 varieties of winter wheat. — John W. Roberts. 



405. Salaman, Redclipfb N. The influence of size and character of seed on the yield of 

 potatoes. Jour. Ministry Agric. Great Britain 28: 43-48. 1921. 



406. Sayre, L. E. Corn oil. Trans. Kansas Acad. Sci. 29: 114-115. 1920.— A brief state- 

 ment is made of the excellent keeping qualities, very low melting point but high smoking point, 

 of corn oil and its use as a food. — F. C. Gates. 



407. SiEGMUND, Gustav. Die Hebung unserer Kartoflfelproduktion durch die englische 

 Saatkartoffelaktion. [The improvement of our potato production through the English seed 

 potato arrangement.] Oesterreich. Zeitschr. Kartoffelbau 1^: 13-14, 1921. — The greatest 

 obstacle to recovery of Austrian potato production, which had fallen about 40 per cent, was 

 the lack of good seed. The furnishing of the best Scotch and Irish varieties through the Eng- 

 lish Reparation Commission has to a considerable extent overcome the deficiency. — F. Weiss. 



408. Wacker, J. Einige Beobachtungen am Kartoffelsortiment des hohenheimer Ver- 

 suchsfeldes vom Jahre 1920. [Some observations on varieties of potato in the Hohenheimer 

 experunent field in the year 1920.] Illus. Landw. Zeitg. 41: 132-133. 1921.— A brief report 

 is made of variety tests of potato in which 93 sorts were used. — John W. Roberts. 



409. Werner, H. O. Irrigation as a factor in seed potato production. Proc. Amer. Soc. 

 Hort. Sci. 17: 133-137. 1920 [l92l]. — Triumph potatoes were grown on the tuber unit basis 

 under irrigation at Minatare, Nebraska, in 1917. They grouped themselves into a well-defined 

 high-yielding group and a low-yielding group, with very few intermediates. Seed stock grown 

 under irrigation gave consistently lower yields than seed stock not grown under irrigation. 

 The data presented "indicate that the conditions produced by irrigation as practiced in the 

 West, have a very markedly deleterious effect upon tubers for seed purposes, which is manifest 

 after the first season. Disease has not been a factor in this work. Irrigation has been the 

 only factor that can be considered responsible for the differences secured." — H. A. Jones. 



410. Williams, C. B., W. F. Pate, E. C. Blair, and R. W. Collett. I. Fertilizer experi- 

 ments with wheat on mountain soils. II. Wheat culture in North Carolina. Bull. North 

 Carolina Dept. Agric. 41'°: 2-48. 1920. — Different amounts of mineral fertilizers were used 

 on wheat with varying profit. General cultural recommendations are included in the paper. — 

 F. A. Wolf. 



411. Wittmack, L. Die Samen unserer Kleegewachse und ihre Verunreinigungen. 

 [The seeds of our clovers and their adulterants.] Illus. Landw. Zeitg. 41 : 178-180. 7 fig. 

 1921. — Descriptions, with drawings, are presented of the seeds of the following species: Medi- 

 cago sativa, M.falcata, M. denticulata, M. arabica, M. minima, M. Iwpulina, Trifolium pratense, 

 T. repens, T. hybridum, T. angulatum, T. parviflorum, T. minus, T. supinum, T. incarnatum, 

 Lotus corniculatus, L. uliginosus, and Anthyllis vulneraria. — John W. Roberts. 



