February, 1920] AGRONOMY 27 



machines have made it possible to convert into usable form the nutritious stems and leaves 

 of yucca, as well as similar plants, thus developing a highly valuable emergency stock feed. — 

 Mature cattle arc fed 20 to 40 pounds of shredded soap weed and 1 to 2 pounds of cotton- 

 seed cake per day. With the chopped feed alone, 20 to 25 pounds per day will save stock 

 from starvation. With a pound of cottonseed cake in addition, a fairly well-balanced ration 

 is secured.— The average cost of feeding 20 pounds of chopped soap weed per animal is about 

 50 cents a month. With the addition of cottonseed cake when worth $67 per ton at the 

 ranch, animals can be kept in good condition, and sometimes improved, for about 5 cent3 

 per day per animal at the present prevailing prices of labor, fuel, oil, etc. — It has been proven 

 that most of the species of yucca are not likely to recover after cutting. The most valuable 

 species, Yucca data (soap weed) and Yucca glauca (bear-grass), may be expected to recover, 

 the former slowly and the latter more rapidly, especially if the plants are not cut too close 

 and are given opportunity to grow. — C. V. Piper. 



ISO. Forsling, C. L. Chopped soapweed as emergency feed for cattle on southwestern 

 ranges. U. S. Dept. Agric. Bull. 745. 20 p., 5 pi. 1919. — On these great arid plains, the 

 greatest handicap to the stock industry has been eliminated by the proper use of soapweed 

 ( Yucca elata) as a cattle feed during the extended droughts. The dead basal leaves are 

 burned off; the remainder of the 3-foot tall plants is chopped or shredded by recently invented 

 machines. The cattle thrive upon it and relish it, especially when shredded, either fresh, 

 as ensilage, or in combination with cotton-seed meal. Analyses of chopped soapweed com- 

 pare favorably with those of native forage grasses for feed. Conservation is necessary since 

 soapweed grows very slowly and is the only protection the cattle have from wind storms. 

 A number of smaller related species are likewise used, more profitably, however, as ensilage. 

 [See Bot. Absts. 2, Entry 652.]— 4. R. Bechtel. 



181. Federal Horticultural Board. U. S. Dept. Agric. Amendment No. 2 to regu- 

 lations supplemental to notice of quarantine No. 37. Service and regulatory announcements 

 61. 33 p. 1919— See Bot. Absts. 3, Entry 400. 



182. Federal Horticultural Board. U. S. Dept. Agric. Nursery stock, plant and 

 seed quarantine. Notice of quarantine No. 37, with regulations. Service and regulatory 

 announcements 57: 101-110. 1919.— See Bot. Absts. 3, Entry 401. 



183. Drake, J. A., and J. C. Rundles. Sweet clover on corn belt farms. U. S. .Dept. 

 Agric. Farmers' Bull. 1005. 28 p., fig. 1-9. 1919. 



184. Yoder, P. A. Growing sugar cane for sirup. TJ. S. Dept. Agric. Farmers' Bull. 

 1034. 35 p., fig. 1-15. 1919. 



185. Anonymous. Geography of U. S. botanical drugs. Pharm. Era 52:63-66, S9-92. 

 9 fig., 2 maps. 1919.— See Bot. Absts. 3, Entry 424. 



186. Skinner, J. J., and F. R. Reid. The influence of phosphates on the action of alpha- 

 crotonic acid on plants. Amer. Jour. Bot. 6: 167-180. Fig. 1-9. 1919. — See Bot. Absts. 3, 

 Entry 437. 



1S7. Porter, W. R., and O. A. Stevens. Sow thistle and other weeds of similar habits. 

 North Dakota Agric. Exp. Sta. Ext. Div. Circ. 18. 12 p., fig. 1-9. 1919— Deals with 

 Sonchus arvensis, Carduus arvensis [Circium arvense,] Agropyron repens, Linaria Linaria, 

 Euphorbia Esula and Convolvulus arvensis. — L. R. Waldron. 



188. Waldron, L. R. Alfalfa for North Dakota. North Dakota Agric. Exp. Sta. Ext. 

 Div. Circ. 19. 8 p. 1919. 



189. Yampolsky, Cecil. Potato seed plot and certification of potato seed stocks. North 

 Dakota Agric. Exp. Sta. Ext. Div. Circ. 21. $ p., fig. 1-2. 1919. 



