No. 2, June, 1921] AGRONOMY 117 



content of the wheat is correspondingly improved. Carelessness in the use of water may 

 offset, to some extent, other favorable conditions since the maximum protein content was 

 never obtained with the greatest amounts of irrigation water. Deterioration of seed due to 

 growth in irrigated regions has no effect upon protein content of the crop and there is no 

 advantage in securing seed from non-irrigated regions. However, there is much to be gained 

 in selecting varieties of wheat having characteristically high protein content. Evidence 

 suggests that from this point of view hard, red, spring wheat would be worth at least a 

 trial. — V. H. Young. 



792. KoFAHL, H. Der gehornte Schotenklee. [The horned pod clover (Lotus cornicu- 

 latus).] Illus. Landw. Zeitg. 41: 146-147. 1921. — This plant is recommended as a perennial 

 leguminous forage plant in sections of Germany where alfalfa cannot be successfully grown. 

 It grows best on a fertile soil having a clay subsoil and free from weeds, especially couch 

 grass; it should be grown with oats or barley. The first cutting is the most productive. It 

 appears to be long-lived and entirely resistant to winter killing. The best yield of seed is 

 from the 2nd cutting. As forage, it is well liked by both cattle and swine. — John W. Roberts. 



793. Kress, Otto. Cooking cotton hull fiber for pulp. Paper 25 : 90-1^968, 1009-1011 . 1920. 



794. Maiden, J. H. Chats about the prickly pear. No. 8. Agric. Gaz. New South 

 Wales 32: 45-48. 1 fig. 1921. — A discussion of extermination methods is presented. It 

 has been found that cutting just below the surface of the ground, followed by thorough spray- 

 ing with suitable poisons, generally kills the plant. — L. R. Waldron. 



795. Maktx, R. N. Farmers' experiment plots. Potato experiments, 1919-20, Cotta 

 Walla-Crookwell District. Agric. Gaz. New South Wales 32: 7-9. 1921.— Variety trials 

 carried on in cooperation with .3 farmers showed considerable variations in yield. One 

 variety, Factor, yielded best, and Magnum Bonum and Early Manistee are recommended. — 

 L. R. Waldron. 



796. Malte, M. O. Breeding methods in forage plants. Sci. Agric. [Canada] 1: 25-29. 

 1921. — A paper read before the Western Canadian Society of Agronomy and confined to 

 breeding methods of a practical nature applicable to grasses, alfalfa, and red clover in Western 

 Canada. Author found that in western rye grass {Agropyrum tenerum Vasey) and in other 

 species of Agropyrum, self-fertilization regularly takes place. It is thus possible to work 

 with many forms without the necessity of isolation. With alfalfa imperfect seed formation 

 is due to defective sexual organs and frequently 'to unsuitable environmental conditions. 

 In the case of red clover mass-selection brings results in a comparatively short time and is 

 of practical importance. — B. T. Dickson. 



797. Neidig, Ray E. Sugar beet top silage. Jour. Agric. Res. 20: 537-542. 1921. — 

 Chemical anaWses of average beet top silage, as found on the farm. Careless ensiling may 

 allow abnormal fermentation, with possible production of substances toxic to animals. — 

 D. Reddick. 



798. Opazo, Roberto. Cultivo y industria del azucar de betarraga. [Cultivation of the 

 sugar beet.] El Agricultor [Santiago, Chile] 5: 120-122. 1920.— Discusses the possibility 

 of a sugar beet industry in Chile. — John A. Stevenson. 



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

 Agricultor [Santiago, Chile] 5: 195-198. 1920.— Discusses the cultivation of the peanut, sun- 

 flower, soybean, sesamum, and poppy as oil plants. — John A. Stevenson. 



800. Opazo, Roberto. Preparacion de terrenos para la siembra de chacras. [Cultivation 

 of small farms.] El Agricultor [Santiago, Chile] 5: 165-166. 1920.— Recommends seed selec- 

 tion of corn, sorghum, and other crops to be grown on small holdings and gives general cul- 

 tural directions. — John A. Stevenson. 



801. Opazo, Roberto. Siembras de cebada y de avena. [Seeding barley and oats.] El 

 Agricultor [Santiago, Chile] 5 : 147-148. 1920. 



