No. 2, September, 1921] AGRONOMY 97 



general increase in yield of grain or hay can be attributed to the use of lime in the case of any 

 of these crops. — Variety tests for ground nuts are reported as well as experiments with 19 

 varieties of dwarf beans and 20 of runner beans. Seed yields of important legumes such at 

 velvet beans, Canadian beans, +eparj' beans, soybeans, field pea, and chick pea are given. 

 Flax grown for fiber and for seed is discussed. Results with root crops are presented.— Mary 

 R. Burr. 



023. Olivares, Daniel. El cultivo de la alfalfa y su henificaci6n. [Alfalfa cultivation 

 and the making of hay.] Rev. Agric. [Mexico] 5: 427-430. 6 fig. 1920. — Popular. — John A. 

 Stevenson. 



624. Olsen, Edgar I. Fifteenth annual report of the state demonstration farms, 1920. 

 North Dakota Agric. Exp. Sta. Bull. 148. 38 p., 8 fig. 1921. — Detailed yields are given and 

 methods of operation for the 19 demonstration farms operating in North Dakota. Figures 

 are given for cost of production and also milling and baking data for 29 samples of wheat, 

 grown on the different farms. The report deals with the following crops: Wheat (common 

 and durum), oats, barley, flax, corn, potatoes, alfalfa for hay and seed, timothy, and sweet 

 clover. For 1920 the demonstration farms showed a net profit of $3.13 per acre. — L. R. 

 Waldron. 



625. Opazo, Roberto. Cultivo de plantas oleaginosas. [Cultivation of oil plants.] El 

 Agricultor [Chile] 5 : 195-198. 5 fig. 1920. — Brief cultural directions are given for the peanut, 

 sunflower, poppy, sesamum, and soybean. The olive is not recommended because of its 

 slow growth. — John A. Stevenson. 



626. Overgaard, J. C. Undersogelser over Landbrugets Driftsforhold. [Survey of the 

 business of agriculture.] Tidsskr. Landokonomi 1921 : 78-87. 1921. — A description is given of 

 economic conditions in Danish agriculture during 1918-19. Tables are included showing 

 the number and size of farms under cultivation, and presenting statistics for livestock on 

 farms, butter production, etc. — Albert A. Hansen. 



627. Pridham, J. T. The elimination of the unfit. Agric. Gaz. New South Wales 32: 

 235-236. 1921. — The article advocates for use varieties improved by pure line breeding. — 

 L. R. Waldron. 



628. Pridham, J. T. Varieties of oats tested in New South Wales. Agric. Gaz. New 

 South Wales 32: 249-252. 1921. — Notes are given on 72 varieties, including synonyms, in 

 regard to season, character of leaves and straw, appearance of grain, breeding or origin, 

 defects, good points, and districts to which they are suited. — L. R. Waldron. 



629. RamIrez, RomXn. Anonacea textil. [An anonaceous textile plant.] Rev. Agric. 

 [Mexico] 4: 505. 1 fig. 1919. — A brief description is given of Rollinia sp. and the fiber ob- 

 tained from it. — John A. Stevenson. 



630. Root, A. I, The new sweet clover, grown by the acre. Gleanings in Bee Culture 

 49: 46^7. Fig. 1-2. 1921. — The new annual sweet clover is a mutant of white sweet clover 

 (Melilotus alba). Brief reports are given on the cultivation of annual sweet clover in Ohio, 

 Vermont, Illinois, and Iowa. — /. H. Lovell. 



631. Saez, Daniel. El cultivo del algodon en Artigas. [Cotton cultivation in Artigas.] 

 Defensa Agric. [Uruguay] 1: 281-283. 1920; 2: 24-25. 1921.— A popular account of cotton 

 cultivation is presented. — John A. Stevenson. 



632. Saillard, Emile. Ensayos culturales sobre diversas variedades de remolacha 

 azucarera durante el ano 1920. [Cultural experiments with sugar beet varieties in 1920.] Infor- 

 macion Agric. [Madrid] 11: 132-135. 1921.— Experiments were undertaken in 1920 by the 

 syndicate of sugar manufacturers of France with sugar beet varieties. Five foreign and 5 



