98 AGRONOMY [Box. Absts., Vol. IX, 



native varieties were tested in 7 localities ; the native varieties proved slightly superior. A 

 brief account is given of trials made in England with some of the same varieties. The results 

 of the analyses of 30S8 sugar beet roots of the variety Vilmorin B are given. Those containing 

 19.5 to 20.5 per cent of sugar represented 65 per cent of the total number. In weight, 77 per 

 cent contained between GOO and 1000 gm. of sugar, and included most of the roots with a sugar 

 content of over 20.5 per cent. — John A. Stevenson. 



633. Sarrasin, J. Maim6. Una planta danina. La Melica macra o paste serrucho. [A 

 noxious weed. Melica macra or saw grass.] Defensa Agric. [Uruguay] 2: 5-9. 4 fig. 1921. — 

 This grass has become a bad weed in the uplands of Uruguay where it is spreading rapidly. 

 It is not eaten by stock nor injured by fire. The spines are injurious to sheep. — John A. 

 Stevenson. 



634. ScHERFFius, W. H. Factors that affect the growth, reproduction, and maturity of 

 tobacco. Jour. Dept. Agric. Union of South Africa 1: 728-731. 1920. — The author briefly 

 discusses the factors light, including intensity, quality and duration; temperature and mois- 

 ture; chemical changes; fertility of soil; and their effects on growing tobacco plants. — 

 Lyman Carrier. 



635. Sears, R. N. A new clover. Amer. Bee Jour. 61: 141. 1921. — At Alturas, Modoc 

 County, in the northern part of California, cow clover {Trifolium involucratum) is common 

 in the meadows and along streams. According to F. C. Pellett, cow clover resembles 

 alsike clover and has every characteristic of a valuable forage plant. The honey from this 

 new clover is paler than that from alfalfa. — /. H. Lovell. 



636. Shepherd, A. N. Farmers' experiment plots. Hay trials, 1920. Murrumbidgee 

 irrigation areas. Agric. Gaz. New South Wales 32: 239-241. 1921. — Trials were conducted 

 on 4 farms. The results from wheats and oats were nearly the same. Zealand wheat was 

 excellent for hay production under irrigation and Yandilla King gave good returns. — L. R. 

 Waldron. 



637. Sparks, G. C. Farmers' experiment plots. Wheat, oat and barley experiments, 

 1920. Southern district. Agric. Gaz. New South Wales 32: 229-234. 1921.— These experi- 

 ments were conducted upon 12 farms; seasonal and soil notes are given. Canberra, Federa- 

 tion, and Yandilla King yielded best. The new variety, Gresley 83, did well at the 1 place 

 where tried. Standard manuring with 56 lbs. of superphosphate per acre gave best results. 

 Early seeding gave best results at 1 farm. Graded seed gave the best average results. Heavy 

 seeding gave the best results generally. One trial showed better yield for unacclimatized 

 seed. Oat and barley trials showed no positive results. — L. R. Waldron. 



638. Thompstone, E. Report of the Mandalay Agricultural Station; Report on the Botani- 

 cal Area, Mandalay ; Report on the Bugyi and Nagu Plots ; Report of the Padu Agricultural Sta- 

 tion; Report of the Hopin Agricultural Station; Report of the Yawnghwe Agricultural Station; 

 Report of the Hsumhsai Experimental Station. Ann. Kept. Agric. Sta., Agric. Chem., Agric. 

 Eng., Asst. Bot., Northern Circle, and Asst. Entomol., Burma 1918-1919: 1-68. 1920.— At 

 the various stations and plots, work is carried on in investigation of fertilizers and fertilizer 

 methods; methods of cultivation; selection, trial, and distribution to cultivators of promising 

 varieties of field crops. Attention has been given to 2 special problems: The parasitism, and 

 methods of eradication, of Striga lutea; and the value and methods of utilization of Eichornia 

 crassipes as fertilizer material. — Winfield Dudgeon. 



639. Trowbridge, P. F. Report of the director, North Dakota Agricultural College Experi- 

 ment Station, for the fiscal year ending June 30, 1920. North Dakota Agric. Exp. Sta. Bull. 

 146. 48 p., 6 fig. 1921. — The work reported upon includes comparative yield tests with wheat 

 in a rotation series. Rotation plots in 1919, when rust was exceedingly prevalent, gave better 

 yields than the plots continuously cropped. Baking and milling tests of varieties of wheat 



