450 EXPERIMENT STATION RECORD. (Vol.37 



Dried blood In small amounts proved beneficial, but with amounts exceeding 

 8 lbs. per 100 sq. ft. of bench space there was a decrease in production with 

 own-root and grafted Brides and grafted Killarneys. The effect of dried blood 

 upon weelily production was found to be a decrease during the fall months, no 

 difference during winter, and an increase in the spring. 



No benefit was obtained from the use of potassium sulphate under the condi- 

 tions of the experiment. Mixing ground limestone with the soil resulted in 

 decrea.sed production whether or not acid pho.sphnte had been added. Hence 

 ground limestone is not recommended for general use. 



A definite relation was found to exist between the variation in hours of sun- 

 shine and the subsequent production of flowers. The experiment showed the 

 desirability of planting grafted stocli, since its larger production during the first 

 year more than paid for the increase in initial cost. 



Based on the experiments, the author recommends that the nitrogen content 

 of rose soils be maintained by turning under green or farm manures before use. 

 If lack of nitrogen is indicated by a lightening of the color of the foliage, 

 applications of liquid manure, mulches of manure, or top-dressings of dried 

 blood may be used, the last in applications not exceeding 5 lbs. per 100 sq. ft. 

 of bench space, to be applied not oftener than six weeks apart. Nitrogenous 

 fertilizers should be applied only during sunshiny weather and most generously 

 during periods of heavy production. Generous quantities of acid phosphate 

 should be added to the soil. It may be applied in the field at the rate of 4 to 8 

 tons per acre and in the bench soil at the rate of 40 to 80 lbs. per 100 cu. ft. 

 of soil. Neither lime nor limestone should be mixed with the .soil. If nee<led 

 for .sweetening the soil and for preventing the growth of algte a top-dressing 

 of finely-ground limestone at the rate of 10 lbs. per KX) sq. ft. of bench space 

 may be applied. 



FORESTRY. 



Proceedings of the Southern Forestry Congress, held in Asheville, N. C, 

 July 11 to 15, 1916 {Proc. South. Forestry Cong., 1916. pp. 187).— A report of 

 numerous papers, addresses, and discussions at this meeting of the Southern 

 Forestry Congress. Problems dealing with forest protection, organization, 

 legislation, and management in their relation to the protection and devolop- 

 iiient of southorn forest industries roreivod special consideration. 



Tree growth and climate in the United States, K. W. Woodward {Jour. 

 ForcKtry, 15 (1917), No. 5, pp. 521-531). — A summary of the available infor- 

 mation with regard to forest yields in the United States and a discussion of 

 the relation of these yields to climate and soil. Fifteen forest types are differ- 

 entiated with special reference to climatic and .soil characteristics. 



Laws of tall-tree growth investigated mathematically, R. D. Bohann.\n 

 {Jour. Forestry, 15 (1917). No. 5, pp. 5S2-551).— In this article the author 

 undertakes to prove a number of formulas and laws relating to height growth 

 in forest trees, presents age-height-dlameter tables for various .\merican trees, 

 and gives notes on the mea.surements of the different si>ecies. 



The problem of making volume tables for use on the National Forests. 

 T. T. MuNGER {Jour. Forestry, 15 {1917), No. 5, pp. 57^-586).— In this paper 

 the author calls attention briefly to the part that the Branch of Research of the 

 Forest Service of the U. S. Department of Agriculture should take In the 

 preparation of volume tables, sketches some of the questions that arise In their 

 preparation, and suggests some of the principles that .should guide the work. 



Site determination, classification, and application, R. AVatson (Jour. For- 

 estry. 15 {1917), No. 5, pp. 552-563, fig. 1). — The pui-pose of this article Is to 



