70 AGRONOMY [Bot. Absts. 



467. Fisher, M. L. The washed lands of Indiana: A preliminary study. Indiana 

 (Purdue) Agric. Exp. Sta. Circ. 90: 11-24. Fig. 1-18. 1919.— Much land in Indiana which 

 was once productive has become practically worthless because of erosion. The worst condi- 

 tions are found on the moderate slopes of 3 to 10 per cent. This erosion is due largely to the 

 deforestation of steep hillsides, too heavy pasturing, a poor system of farming, and neglect. 

 Methods of prevention of erosion and of reclamation of washed slopes are given. — Max W. 

 Gardner. 



468. Garber, R. J., and P. J. Olsen. A study of the relation of some morphological 

 characters to lodging in cereals. Jour. Amer. Soc. Agron. 2: 173-187. Fig. 1-2. 1919. — Extreme 

 varieties with regard to lodging and non-lodging in wheat, oats and barley were selected for 

 this study. Measurements were also made on Minnesota No. 2 winter rye which stands up 

 better than the other cereals. A study was made of the correlation between lodging behavior 

 and average size of culm, average number of bundles, average area of sclerenchyma, thickness 

 of culm wall, length of lignified cells and thickness of lignified cell wall. None of the above 

 mentioned characters except thickness of cell wall seems closely related to lodging. Both 

 early and medium oat varieties examined showed distinct correlations between thickness 

 of lignified cell walls and lodging. In general, lodging in cereals is dependent on so many 

 factors of unequal value in the different sorts that no one factor seems to be correlated closely 

 enough with lodging to be of much value as a selection index. Among the different strains 

 of oats and barley the average number of vascular bundles was found to be correlated with 

 average diameter of culms. — F. M. Schertz. 



469. Gordon, George S. Tests with flax varieties. Jour. Dept. Agric. Victoria 17; 

 164-170. PI. 4- 1919. — Of 3 varieties of English flax, the Northern Linseed produced the 

 largest yields. The percentage of oil in each was approximately the same. The American 

 variety of fibre flax, "Blue Blossom," compared well in growth with the English varieties, 

 and appeared disease resistant. — J. J. Skinner. 



470. Gray, G. P. Tests of chemical means for the control of weeds. Univ. California 

 Publ. (Agric. Sci.) 4: 67-97. Fig. 1-11. 1919. — A report of progress on experiments on the 

 control of the wild morning glory [Convolvulus arvensis] involving trials of sodium arsenite, 

 sodium c} r anide, sulfuric acid, and acid sludge. The herbicides were either introduced into 

 the soil, or sprayed upon the foliage. — The application of a spray of sodium arsenite to the 

 foliage, while not wholly successful, gave some promising results. The spray was more toxic 

 when the plants were approaching the dormant condition and when the moisture content of 

 the air was sufficient to prevent rapid evaporation. — II. S. Reed. 



471. Larsen, S. G. Potato silage — how to make and use. Potato Mag. I 9 : 14. 1919. 



472. Le Clerc, J. A. Potato flour and potato bread. Potato Mag. 1 8 :9-10, 29-31, 33. 

 S fig. 1919. — Discusses preparation, composition, use and value of potatoes and potato prod- 

 ucts, with special reference to bread-making. — Donald Folsom. 



473. Lewis, A. C., and C. A. McLendon. Cotton variety tests, 1918. Georgia State 

 Bd. Entomol. Bull. 52. 40 p. Fig. 1. 1919. — In South Georgia, all that part of the state south 

 of a line from Augusta through Macon to Columbus, where wilt [Neocos?nospora vasinfecta] 

 occurs, only varieties of cotton (Gossypium.) resistant to it should be grown, such as Lewis 

 63, Council-Toole and DeSoto. Where wilt, does not occur in this section pure strains of 

 Toole, Cleveland Big-Boll, Cook's Improved and College No. 1 are recommended. In 

 North Georgia, Cleveland Big-Boll, Cook's Improved and College No. 1 are recommended 

 — T. II. McIIatton. 



474. McClellan, W. R. Growing potatoes in the Greeley district in 1918. Potato Mag. 

 1 8 :9, 30-32. 1919. — Describes effects of 1918 weather and results from using selected seed 

 stock. — Donald Folsom. 



