232 HORTICITLTURE [BoT. Absts., Vol. IX, 



were provided for. The orchard was started in 1917 and the experiments begun in the same 

 year. In 1920, a good crop of fruit was produced and yield and growth records were secured. 

 The following observations were made: (1) As compared with clean cultivation, cow peas 

 used as a cover crop, planted July 10-15, were detrimental to the growth and yield of peach trees; 



(2) the addition of a fertilizer carrying soluble potassium completely corrected the difficulty; 



(3) the addition of a fertilizer carrying soluble nitrogen partly corrected the difficulty; (4) 

 the addition of a fertilizer carrj'ing phosphorus gave uncertain results; (5) the addition of 

 both nitrogen and potassium somewhat increased the yield of cover-crop plats over clean 

 cultivation plats; (6) rye following cow peas, used as a winter cover, was very detrimental, 

 almost deadly, in effect. — E. C. Auchter. 



1435. Pole Evans, I. B., Mart R. H. Thomson, V. A. Putterill, and Geo. Hobson. 

 Further investigations into the cause of wastage in export citrus fruits from South Africa. Union 

 of South Africa Dept. Agric. Bull. Gen. Ser. 1. ^8 p., 54 Jig. 1921. — The investigations in- 

 clude an examination of the methods of handling the fruit and of the channels through which 

 it passes from the orchard to the market. Orchards, packing sheds, railway trucks, cold 

 stores, and box-wood were examined and inoculation experiments carried out with the various 

 fungi found. It is shown, however, that wastage is due to the olive green mould, Penicillium 

 digitatum, and to the blue green mould, Penicillium italician. These moulds are apparently 

 incapable of attacking perfectly sound fruits, hence the danger of wounded fruits is pointed 

 out, also the many sources of bruising. Special attention is drawn to the dangerous practice 

 of packing with an excessive bulge. Experimental consignments of fruit, picked, graded, and 

 packed by specially selected men, were put on the London market with very favorable re- 

 sults. The investigations show that with ordinary care and intelligent handling. South Afri- 

 can citrus fruits can be placed on the overseas markets with only a negligible amount of waste. 

 The scope and justification for continuing the investigation are pointed out. — M. R. H. 

 Thomson. 



1436. Popenoe, Wilson. Tropical fruits. Proc. Amer. Pomol. Soc. 35: 190-214. 1917 

 [1919]. — The common and scientific names of many tropical fruits are listed. Brief discussions 

 concerning the names of several fruits are given. — E. C. Auchter. 



1437. Rees, R. W. Central fruit packing associations as an extension project. Proc. 

 Amer. Soc. Hort. Sci. 17: S0-S3. 1920 [1921].— In 1918, at the request of a group of New York 

 fruit growers for aid in marketing fruit, the extension specialist and county agent helped 

 organize a community packing house. The details of the organization were worked out in 

 several meetings with a committee of the growers. In 1918, 6 community packing houses were 

 operated; in 1919, 7 more were added, and in 1920, 12 additional ones were organized. In 

 1920, 21 of these locals were federated into a central association. — E. C. Auchter. 



1438. Roberts, R. H. Experiments upon apple tree nutrition. Proc. Amer. Soc. Hort. 

 Sci. 17: 197-200. 1920 [1921]. — In nutritional studies with apple trees, the author finds fruit- 

 fulness apparently closely related to nutritional conditions. His recent data indicate that 

 blossom-bud formation has a definite relation to the nature and amount of reserve materials 

 in the tree. Yield records are not considered as of as much importance as certain other growth 

 and blossom records of spurs, terminals, laterals, etc.; a suggested list of desirable data is 

 included. It is felt that the relation of growth conditions to fruitfulness is a rather constant 

 matter. Although the internal composition of the tree is important, it is felt that such knowl- 

 edge is not necessary in a practical measurement of the vegetative or fruiting condition of the 

 tree. The author states "There are correlated growth conditions which answer very well 

 for purposes of experimentation if it is constantly remembered that they are not the factors 

 giving fruitfulness, but are, in turn, only the effects of internal conditions." — E. C. Auchter. 



1439. Rogers, A. J. Sweet cherry culture. Proc. Amer. Pomol. Soc. 35: 118-121. 1917 

 [1919]. — The author gives his experience in the growing, harvesting, packing, and marketing 

 of cherries. — E. C. Auchter. 



