8 AGRONOMY [Bot. Absts., Vol. IV, 



54. Cutting, M. C. Peat soils of Minnesota and their cultivation. Jour. Amer. Peat. 

 Soc. 12 : 190-194. 1919.— The state has 7,000,000 acres (nearly one-seventh of its total area) 

 of peat land. Important factors in crop production on peat soil are drainage, climate and fer- 

 tilization. Any one of these factors may be the limiting one. Three experimental tracts in 

 different parts of the state were cultivated in 1918 by the State Experiment Station. On the 

 basis of the results on the one in the northwest portion of the state it is suggested that rye, 

 oats, barley, and a mixture of timothy and alsike clover be tried by the farmers of that region 

 on either burned or unburned peat. On unburned peat the use of 12 tons of stable manure 

 per acre or 200 to 400 pounds of acid phosphate is recommended. On burned peat the use 

 of the fertilizer is unnecessary. — G. B. Rigg. 



55. Dahl, A. L. Growing hops in California. Sci. Amer. Supplem. 87:312-313. 4 fig. 

 1919. 



56. Dash, J. S. Quelques conseils aux producteurs de Cannes de la Guadeloupe. [Hints 

 to the sugar-cane growers of Guadeloupe.] Sta. Agron. Guadeloupe Bull. 1: 11-30. 1919. — 

 See Bot. Absts. 3, Entry 2616. 



57. Deem, J. W. Marton Experimental Area. New Zealand Jour. Agric. 19: 17-19. 1919. 

 A summary of variety tests on wheat, oats, barley, and miscellaneous crops, and notes as to 

 the feeding value of varieties of rape, kale, turnip, and kohl rabi. — N. J. Giddings. 



58. De Graaf, W. C. De cultuur van genees krachtige planten in Nederland. [Culti- 

 vation of medicinal plants in Holland.] Pharm. Weekblad 56:1101-1112. 1919.— See Bot. 

 Absts. 3, Entry 2795. 



59. Drake, J. A., J. C. Rundles, and Ralph D. Jennings. Alfalfa on corn-belt farms. 

 U. S. Dept. Agric. Farmers Bull. 1021. 32 p., 16 fig. 1919. 



60. Duggar, J. F., and H. B. Tisdale. Velvet bean seeds : results of germination experi- 

 ments. Alabama Agric. Exp. Sta. Press Bull. 98. 4 V- 1919. 



61. Dunlap, M. P. The seed growing industry in Denmark. Seed World 6 3 : 18-19. 

 1919. 



62. Fairchild, David. The palate of civilized man and its influence on agriculture. 

 Sci. Amer. Supplem. 87:68-71. 8 fig. 1919. 



• 



63. Farmer, George. Annual Report of the Economic Plants Division for the year ending 

 31st March, 1917. Dept. Agric. British East Africa Ann. Rept. 1916-1917:29-36. 1918. 



64. Feilitzen, H. von. Cultural experiments on moor lands. Jour. Amer. Peat. Soc. 

 12:216-217. 1919.— An increased yield of hay in a 5-year test was secured by mixing sand 

 with the surface layer of an imperfectly decomposed peat soil. A surface covering of sand 

 also gave good results with various crops on shallow bog soils. Phosphorus carriers were 

 beneficial. Nitrogen carriers were not beneficial on account of the high nitrogen content of 

 the soils. — G. B. Rigg. 



65. Fortun, Gonzalez M. Informe de los departamentos deagriculturaybotanica. [Re- 

 port of the departments of agriculture and botany.] Informe Estac. Exp. Agron. [Cuba] 

 1917-1918:441-418. 1919.— Report of work for the year.— John A. Stevenson. 



66. Fron and Rigotard. Contribution a l'etude de la flore fourragere spontanee au 

 Maroc et particulierement du Lotus arenarius (Brotero). [Native forage plants of Morocco, 

 especially Lotus arenarius.] Compt. Rend. Acad. Agric. France 5:704-709. 1919. — A dis- 

 cussion of the properties of Lotus arenarius as a fodder plant, its botanical characteristics, 

 its distribution, and its possible value under cultivation. — E. A. Bessey. 



