742 EXPERIMENT STATION RECORD. 



Experiments in resanding were continued. Tlie results indicate tliat the 

 yield of berries is reduced by a prolonged lack of resanding. In general the 

 berries from unsanded plats kept better than those from sanded plats. Somo 

 notes are given on a test of spray mixtures in which it was demonstrated that 

 resin fish-oil soap and arsenate of lead can not safely be used together as a 

 spray unless lime is added. As a result of three years' experience there appears 

 to be no distinct advantage in hand picking cranberries. 



Observations on the station bog crop have shown that the higher and better 

 drained portions usually produce more fruit than the low portions. An exam- 

 ination of the root systems of plants on high and low areas indicates that the 

 root systems on flowed bogs are confined for the most part to sand above the 

 peat, while on dry bogs the roots run well down into the peat. The author calls 

 attention to the need of a more thorough linowledge of the underground por- 

 tions of the cranberry plant. 



Selection and preparation of land for cranberry culture, C. L. Lewis (Min- 

 nesota Sta. Bui. U2 il9U), pp. 9-46, figs. iS).— This bulletin deals primarily 

 with the problems involved in the selection of suitable land for cranberry cul- 

 ture, its preparation, planting, and care up to the fifth year. Brief general 

 conside.ration is also given to the problems of harvesting, marketing, and pro- 

 tection from diseases and insects. A short bibliography is appended. 



[Citrus experiments], S. E. Collison {Florida Sta. Rpt. 1913, pp. XCVI, 

 XCVII). — In continuation of previous reports (E. S. R., 29, p. 237) measure- 

 ments are given showing the average gain in diameter of trees from June, 1909, 

 to June, 1913, growing on various fertilizer plats in the citrus experimental 

 grove. So far the factors which stand out as evidently influencing growth are 

 clean culture and excessive fertilization, the former in increasing and the latter 

 in retarding growth. The clean culture plats continue to show the largest 

 gains. The plat receiving no fertilizer continues to show less new growth, but 

 no fertilizer or combination of fertilizers ^hows a predominating influence on 

 growth. 



Sand cultures of citrus seedlings, B. F. Floyd (Florida Sta. Rpt. 1913, pp. 

 XLIV-LIII, figs. 2). — This report embodies the result of a preliminary experi- 

 ment carried out in the greenhouse to determine the effect of varying sources of 

 ammonia and phosphoric acid upon the growth of grapefruit seedlings. 



Measurements made during the first season indicate that a combination of 

 dried blood and acid phosphate gave the best growth. The addition of lime to 

 this mixture was a hindrance, the growth being only slightly better than that 

 where lime was used without any fertilizer. A mixture of sulphate of ammonia 

 and acid phosphate gave the poorest growth of any of the combinations. The 

 addition of lime to this mixture improve<l the growth somewhat but lime used 

 alone gave a much better growth. Nitrate of soda and nitrate of potash gave 

 growth measurements which were much alike. Basic slag appears to be the 

 better source of phosphoric acid for use with sulphate of ammonia and nitrate 

 of potash, but was inferior to acid phosphate for use with dried blood. 



Coconuts: Experiments at Peradeniya, M. K. Bamber (Dept. Agr. Ceylon 

 Bills. 2 (1912), pp. S7-S1; 10 (1914), pp. 135-146).— The first of these bulletins 

 is a progress report on fertilizer experiments with old coconut ti'ees, started 

 at the Peradeniya station in 1911. The second presents the results of three 

 years' experimental work. 



Palm fruits and seeds (Missouri Bot. Gard. Bui., 2 (1914), A'o. 9, pp. 101, 

 108, pis. 2). — This comprises illustrations of some 45 species of palm fruits and 

 seeds received by the Missouri Botanical Garden from the Botanical Garden at 

 Rio de Janeiro, Brazil. 



