234 EXPERIMENT STATION RECORD. [Vol. 4.8 



It is concluded that " any farmer interested is justified in trying the plant 

 only in a small exi)erimental plat. Under peculiar conditions it may possess 

 local value enougli to justify cultivation." 



[Experimental results and experiences in potato culture], W. Christie 

 (Rationcl Potetdyrlcning. Nogen Forsoksresultater og Erfaringer. Stockholm: 

 Ivar HfvggHtrdm, 1919, pp. Jf2-61). — The results of fertilizer and cultural tests 

 with potatoes are reported, and cultural directions are briefly presented. 



The largest profit from supplementing barnyard manure witli connnercial 

 fertilizers was secured when the supplemental application was complete. In a 

 test in which 3,500 kg. per decare (aboiit I5..5 tons per acre) of barnyard manure 

 was used, the addition of 30 kg. of 20 per cent superphosphate, 15 kg. of 37 

 per cent potash salt, and 9 kg. of Norwegian nitrate gave the best yield. An 

 application of 35 kg. of 20 per cent superphosphate, 20 kg. of 37 per cent potash 

 salt, and 18 to 25 kg. of Norwegian nitrate per decare gave about as large a yield 

 as? was secured where 7,000 kg. of barnyard manure was applied to a like area. 



The results of planting on ditferent dates were generally in favor of planting 

 about May 8. Distance experiments indicated that generally planting in rows 

 63 cm. (about 2 ft. apart) with the plants from 20 to 30 cm. apart in the row 

 will prove most satisfactory. Medium sized seed tubers weighing from 40 to 60 

 gm. each were found most profitable. Planting whole tubers weighing 65 

 gm. each gave a somewhat larger yield than the same quantity and size of 

 tubers planted as halves cut two weeks before planting, and cutting at this time 

 showed an advantage over cutting immediately before planting. Among seven 

 varieties tested General Cronje ranked first in starch content with 19.1 per cent. 

 The highest yield of tubers and of dry matter was secured from Skaun, but 

 this variety showed 17 per cent of diseased tubers while Genei'al Cronje showed 

 only 5 per cent. In value of crop as based on tuber and starch production 

 General Cronje ranked first and Skaun second. 



Winter rape, C. Fkuwikth {Mitt. Dcut. Landw. Gesell. Osterr., No. 7 (1917), 

 pp. 28). — A brief popular treatise on the value and culture of winter rape, in 

 which many of the cultural recommendations are based on resnilts secured by 

 different Investigators. Statistics are given on the production, importation, and 

 requirements of Austria-Hungary in 1913 of rapeseed oil and other allied 

 products. 



Soy beans in Indiana, A. T. Wiancko and C. O. Cromer {Jndinna Sta. Bui. 

 238 {1920), pp. 3-lG, figs. 9). — This bulletin discusses the value and importance 

 of the soy bean together with the various steps involved in the culture and 

 management of the crop, and reports the resnilts of experiments at the station. 



Soy beans grown after wheat was harvested gave on an average for the four 

 years 1909-1912 a total production of green tops and of roots, taken to the depth 

 of IS in. at the time of the first frost, amounting annually to 6.5 tons per acre 

 and containing 92.7 lbs. of nitrogen. In experiments begun in 1915 the yields 

 of wheat after soy beans in three rotations have averaged 32 bu. per acre as 

 against 25.5 bu. where wheat followed corn in three other rotations. 



Experiments with the Early Brown and Ito San varieties on methods and 

 rates of seeding gave about equal yields of seed from drilling 30 lbs. of seed 

 per acre in 28-in. rows for cultivation and from 00 to 90 lbs. of s-eed per acre 

 drilled solid. For hay production drilling solid produced the largest yields. 



The results of variety tests conducted from 1903 to 1919 are reported in 

 tabular form. The medium early varieties Ito San, Early Brown, Elton, and 

 INIanehu, and the later varieties Hollybrook, Mikado, Haberlandt, and Medium 

 Green are considered desirable for seed production or for planting with corn for 

 silage, and Lexington, Sable, Medium Green, and Sherwood on account of their 

 fine stennned character and fair yielding capacity for hay production. 



