638 EXPERIMENT STATION RECORD. [Vol.43 



The author includes results of varietal experiments with cereals, conducted 

 from 1913 to 1918 at the Aberdeen substation in cooperation witli the Idaho 

 Experiment Station and noted previously (E. S. R., 41, p. 226). 



Iniproveiiient of Rhodesian pastures, H. G. Mundy {Rhodesia Agr. Jour., 

 17 (1920), No. 2, pp. 113-117, pis. 4). — Numerous trials of exotic pasture plants 

 and grasses, representative of almost every part of the world, are said to have 

 been without success, the primary cause of failure being the long dry season of 

 Rhodesia. Native African grasses giving promise in tliis region, namely, Sudan 

 grass, Napier grass, Guinea grass, teff grass (Erof/rostis abyssinica), kikuyu 

 grass {Pennisetum longistylum), Rhodesian tussock grass (Setaria, sp.), mo- 

 lasses grass {Melinis minntiflora) . Penhalonga grass, and Rhodesian buffel 

 grass (Panictim, sp.), are described briefly. 



Culture tests with root crops, 191 7—19 19, L. Helwig (Tidsskr. Planteavl, 

 26 (1920), No. 5, pp. 824-880, fig. i).— Cooperative culture tests in 10 localities 

 in different parts of Denmark were conducted with beets, turnips, and carrots 

 as forage crops. The varieties under test were compared on the basis of dry 

 matter production. 



In the test with field beets Eckendorfer ranked under Barres field beet and 

 several strains of sugar beets in average dry matter production. Among the 

 varieties of yellow turnips Yellow Tankard gave good results, while among the 

 varieties of white turnips White Tankard stood high in dry matter content. 

 Yellow carrots ranked above red carrots in dry matter production. Of dif- 

 ferent varieties of turnips grown on land infested with cabbage diseases. May 

 turnips proved most resistant. 



Oil seed plants, H. Wacker (Landw. Hefte, No. 32-33 (1917), pp. 66, figs. 

 20). — A treatise on the production of fats and oils from oil seed plants, with 

 statistics on the importation and extent of culture of the plants in Germany. 

 Brief descriptions of rape, turnip, false flax, white and black mustard, radish, 

 poppy, sunflower, flax, and hemp are included, together with lists of varieties, 

 cultural methods, and comparative analyses. 



Seed studies : Red clover with special reference to the country of origin 

 of the seed, R. G. Stapleoon (Jour. Agr. Sci. [England], 10 (1920), No. 1, 

 pp. 90-120) .—This article reports a series of studies of red clover seed derived 

 from British, Canadian, Chilean, French, and Italian sources. Detailed notes 

 on the grain weight, color characteristics, germination, and diagnostic weed 

 seeds are included in tabular form. The author suggests a nationality test of 

 red clover seed based on differences in the foregoing qualities. 



The corn crops, E. G. Montgomeky (Nerc York: The Macmillan Co., 1920, 

 rev. ed., pp. XVlT+347, pi. 1, figs. 120).— This is a revised edition of a work 

 previously noted (E. S. R., 30, p. 635). 



Guam corn, G. Briggs (Jour. Amer. Soc. Agron., 12 (1920), No. 5, pp. 149- 

 157). — This paper, a contribution from the Guam Experiment Station, discusses 

 the origin of the one type of maize grown on the island, and describes in detail 

 the habits of growth, stalks, and ear characteristics. 



From all data available the author estimated that about 243 years had elapsed 

 since corn was first planted in Guam, and inasmuch as the natives have made 

 a common practice of saving the seed of a crop for the next planting, the current 

 crop was held to be attaining its 486th cycle. The cultural practices, together 

 with the food and corn nomenclature in vogue, suggested a Mexican origin. No 

 introduction from the United States or tropical countries has proved so well 

 adapted to tropical conditions or the local environment as the Guam corn. 



Forage for the cotton belt, S. M. Tracy (U. S. Dept. Agr., Farmers' Bui. 

 1125 (1920), pp. 63, figs. 9). — This is a revision and enlargement of Farmers' 

 Bulletin 509, previously noted (E. S. R., 28, p. 40). 



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