No. 2, Decembeh, 1921] HORTICULTURE 89 



5GS. Lesourd, F. Phosphorescence des bois. [Phosphorescence of wood.] Rev. Hort. 

 93: 247. 1921. 



5G9. MooMAW, Samuel B., and Caroline B. Sherman. Australia and New Zealand 

 as markets for American fruit. U. S. Dept. Agric. Dept. Giro. 145. 16 p. 1921. 



570. NiswoNGER, H. R. Renewing old orchards in Kentucky. First year results 

 in a five-year program. Kentucky Agric. Exp. Sta. Ext. Giro. 90. 14 p. 1921. — A short de- 

 scription is given of the methods used and the 1st year's results in renovating 7 Kentucky 

 orchards. The cost of renovation per tree was $1.27. The net return per tree was $1.53. — 

 W. D, Valleau. 



VEGETABLE CULTURE 



571. Anonymous. Peppers. U. S. Dept. Agric. Dept. Girc. 160. 10 p. 1921. — A treat- 

 ment on growing and canning of peppers is presented. — L, R. Hesler. 



572. Brown, H. D. Gardening in France. Trans. Indiana Hort. Soc. 1919: 39^3. 4 fig. 

 1920. — The discussion of the relation of such factors as climate and animal pests to gardening 

 conditions in France is followed by a brief account of the use of manure as a fertilizer and 

 the cultural methods used in growing certain vegetables and fruits. — Max W. Gardner, 



573. Hartwell, Burt L., and S. C. Damon. Fertilizer versus manure for continuous 

 vegetable growing. Rhode Island Agric. Exp. Sta. Bull. 182. 10 p. 1920. — Ten cords of stable 

 manure were compared annually for 16 years with about the equivalent of 2500 pounds of a 

 5:6:6 fertilizer. After the 1st fewy ears, the crops generally grew better with the manure 

 than with the fertilizer. At the end of the 1st decade there were about 800 pounds more 

 nitrogen in an acre foot of the manure area than of the fertilizer area. It is estimated that 

 1000 pounds more nitrogen had been added in the manure than in the fertilizer. — B. L. 

 Hartwell. 



574. HuELSBN, Walter A. Selecting and saving tomato seed. Purdue Univ. Agric. 

 Exp. Sta. Bull. 250. 26 p., fig. 1-12. 1920. — Records of yield under Indiana conditions of 

 different strains of several tomato varieties are presented. For the benefit of growers 

 detailed instructions concerning the technic of selection work are given. These include a 

 description of the important vine and fruit characteristics. A method of large-scale seed 

 separation and the machinery^ involved, especially the driers, are described and well illus- 

 trated. — Max W. Gardner. 



575. Potter, George F. Hydrocyanic acid injury to tomatoes. Proc. Amer. Soc. Hort. 

 Sci. 17: 120-126. 1920 [1921]. — The author presents experimental data on fumigation of toma- 

 toes to show that "the lethal dose is not directly related to the time of exposure but is almost 

 exactly inversely proportional to the square root of the time." High relative humidity of the 

 air, high moisture content of the soil, and high temperature all lower the maximum safe dose 

 for fumigation. — H. A. Jones. 



576. Thompson, H. G. Effects of cultivation on soil moisture and yields of certain vege- 

 tables. Proc. Amer. Soc. Hort. Sci. 17: 155-161. 1920 [1921].— "In 1919 early and late crops 

 of carrots, a late crop of beets, and a late crop of beans showed very little advantage in cul- 

 tivation over scraping off the weeds. The late onions, a crop of lettuce, and the tomatoes 

 responded to cultivation more than simply to killing the weeds. There is a slight evidence 

 that celery was also benefited by cultivation." Data presented for 1920 "show no benefits 

 from cultivation for carrots and cabbage. In fact the yield of cabbage was greater on the 

 scraped plots than on the cultivated plots. Onions, beets, and celery responded to cultivation, 

 and tomatoes show some benefits from cultivation on both the trained and untrained plots." 

 Moisture determinations of the soil made in 1919 on the onion plots show an increase of 1.25 

 per cent in the cultivated over the scraped plots. In the carrot plots the moisture content 



