4 AGRONOMY [BoT. Absts., Vol. VII, 



and in 1896 became the first director of the state experimental farm at Tystofte. With this 

 work began the systematic testing of grass seeds of different strains and from various coun- 

 tries, and the development of special seed farms was a subsequent outgrowth of this move- 

 ment. Later a system was introduced of making comparative trials of lots of grass and 

 clover seed submitted by growers and dealers. This has stimulated the selection of special 

 high-yielding strains, especially of grasses and of white clover, of which the Mors strain is 

 best. In the trials, samples of orchard grass (cocksfoot), Italian rye-grass, meadow fescue, 

 tall oat-grass, timothy, red clover, white clover, and bird's-foot trefoil were tested. So far 

 as reported, the native Danish strains were in every case the best. — The last chapter is devoted 

 to the development of trade in guaranteed seeds. This again was initiated by farmers and 

 seedsmen, but later its control was taken over by the government. The success of the whole 

 movement is indicated not only by the much increased acreage of high-yielding forage crops, 

 but also by the fact that Denmark now exports much seed, while formerly it was a large 

 importer. — C. V. Piper. 



23. Federal Horticultural Board, U. S. Dept. Agric. [Restrictive legislation and 

 notices of quarantines in U. S. A.] Service and Regulatory Announcements 68: 52-111. 1920. 



24. Fisher, M. L. The dormant period of timothy seed after harvesting. Proc. Indiana 

 Acad. Sci. 1918: 276-279. 1920. — Reports in 2 tables results of timothy seed germination. 

 After 25 days the germinating percentage of seeds from individual heads averaged 98.2 per 

 cent while in mass selections it was 88 per cent. Three or 4 weeks after harvesting, timothy 

 seed has reached its maximum germinating power. — F. A. Anderson. 



25. FuRBY, E. Wheat experiments for hay. Yanco experiment farm, 1919. Agric. Gaz. 

 New South Wales 31 : 467-471. 1920. — Several standard varieties of wheat were used. Early 

 sowing gave best results. — L. R. Waldron. 



26. Gasser, G. W. Report of the work at Rampart station. Rept. Alaska Agric. Exp' 

 Sta. 1917: 34-57. PI. S-4- 1919. — Reports on the behavior of alfalfa {Medicago falcata and 

 M. sativa), bird vetch (Vicia cracca), field peas, chick pea (Cicer arietinum), clover {Trifo- 

 Uum pratense and T. lupinaster), winter and spring wheat, winter and spring rye, barley, 

 oats, buckwheat, hemp, millet, flax, and potatoes. Nearly all the winter wheat was killed 

 by freezing, but rye was not. Spring rye matured too late. Barley, oats, and most varie- 

 ties of spring wheat matured well. This station is devoted chiefly to grain breeding, and a 

 large proportion of the varieties grown originated here. Two fruits — the first grown in the 

 interior of Alaska — were produced on a Siberian Crab tree. Strawberries of varieties bred 

 at Sitka have survived several winters and have fruited abundantly. Reports are also given 

 on garden vegetables and annual flowering plants. — J. P. Anderson. 



27. Georgeson, C. C. Reports from seed and plant distribution. Rept. Alaska Agric. 

 Exp. Sta. 1917: 86-90. 1919.— See Bot. Absts. 7, Entry 269. 



28. Georgeson, C. C. Summary of the work at the several stations. Rept. Alaska 

 Agric. Exp. Sta. 1917: 5-33. 2 pi. 1919.— See Bot. Absts. 7, Entry 270. 



29. G^rome, J. Essais de culture de Pommes de terre avec des tubercules appauvris ou 

 anormaux (1919). [An experiment.in growing potatoes from depauperate or abnormal tubers.] 

 Bull. Mus. Hist. Nat. [Paris] 25: 677-681. 1919.— Results of this experiment in the vicinity 

 of Paris with 9 varieties are given in tabular form. "Early rose" proved most satisfactory, 

 and "Up to date" and "Prime bretonne" gave encouraging results. — E. B. Payson. 



30. Hamblin, C. O. To infect lucerne seed with nodule organism. Agric. Gaz. New 

 South Wales 31:466. 1920. — Recommends using soil from an old lucerne (alfalfa) field, 

 allowing the soil to dry well in the shade. The author states that the bacteria from artificial 

 (laboratory) cultures are weaker than those produced under natural conditions. — L. R. 

 Waldron. 



