966 



EXPERIMENT STATION RECORD. 



The reforesting of white pine lands (Forester, 5 (1S99), No. 3, pp. 61, 62). — Quota- 

 tions are given from the Forest Warden of Minnesota on the present condition of 

 the pine forests of the State and notes on the possihle income from reforested lands. 



Measuring the forest crop, A. K. Mlodziansky ( U. S. Dept. Agr., Division of 

 Forestry Bui. 20, pp. 71, figs 15). — This bulletin is a brief presentation of the methods 

 by which measurements of felled and standing trees, as well as of whole forests, may 

 be performed, together with a discussion of a method developed by the author for 

 ascertaining the rate of growth of trees and forest crops. This method, it is said, 

 has been tested, and the results obtained recommend it for the rapidity with which 

 a large number of measurements may be coordinated and summarized. 



Periodicity in the growth in thickness of trees, J. Wieler (Tharand. Forst. 

 Jahrb., 48 (1898), p. 100; abs. in Jour. Roy. Micros. Soc. [London], 1S99, Xo. 1, p. 52).— It 

 is stated that often in closely contiguous spots the growth and thickness of tree 

 trunks is far from uniform. There are in general, both with conifers and dicotyle- 

 dons, 2 periods of greatest activity, the one about the beginning of June and the 

 other about the middle of July. The latter period of activity is subject to great 

 variations. The period of greatest activity in the development and unfolding of 

 buds does not necessarily agree with the greatest activity of the cambium. 



SEEDS— WEEDS. 



Experiments on red clover seed, A. N. McAlpine ( Trans. High- 

 land and Agr. Soc. Scotland, 5. ser., 10 (1898), pp. 224-234). — The author 

 conducted a series of experiments to ascertain whether there was auy 

 connection between the yield of clover and the general appearance; size, 

 weight, name, nationality, and price of seed. 



Seven lots of seed were purchased in the open market and their 

 purity and germination determined, after which they were distributed 

 to various growers and grown under numbers, no indications being 

 given the grower as to the origin of the seed. The principal experiment 

 in growing was made at Carbeth, where it was continued for 4 years. 

 In the accompanying table the price per pound, purity, germination, 

 number of seed per pound, yield of hay per plat for 4 years, and order 

 of productiveness is given : 



Comparative tests of red clover seed. 



American 



Canadian 



French 



American (Trifolium medium) 



New Zealand 



English 



German 



Price per 

 pound. 



Cents. 

 12 

 14 

 15 

 15 



19.5 

 24 

 15 



Purity 

 of seed. 



Per cent. 



98 

 100 



99 

 100 

 100 



98 



Germina- Number 



tion : seed per 



of seed, j pound. 



Per cent. 

 84 

 92 

 87 

 91 

 92 

 94 

 89 



297, 300 

 287, 400 

 272, 600 

 260, 000 

 212. 500 

 216, 300 

 206, 900 



Yield of 

 hay per 

 plat. 4 

 years. 



Civt. 

 70 3 

 67 5 

 58.6 

 75.9 

 76.1 

 64.7 

 42.8 



Order of 

 produc- 

 tiveness. 



Other experiments conducted at different places showed either very 

 slight or no appreciable difference. In one case the yield of the plat 

 seeded with American red clover exceeded that of any of the others. 

 In hardiness, as shown by the last cutting at Carbeth, Trifolium medium 



