FIELD CROPS. 1073 



suggested. The chapter dealing especially with the culture of the hop treats of the 

 following subjects: Soil, location, climate, new hop plantations, pruning and cultiva- 

 tion, training, use of fertilizers, injuries and their effects upon growth, yield, cost of 

 production, and value of products. 



Report on potato trials, 1903, H. Juhlin-Dannfelt (A'. Landt. Akad. Handl. 

 och Tidskr., 43 (1904), No. 1-2, pp. 95-162). — A report on tests with 62 varieties of 

 potatoes conducted in different parts of Sweden. The yield of tubers, the percentage 

 of starch, the yield of starch per hectare, and the principal characteristics are given 

 for each variety.— f. w. woll. 



Experiments with potatoes on home-mixed fertilizers, C. D. Woods ( Maine 

 Sin. Ilnl. ii. \ j,j,. 13-21). — The fertilizer requirements of the potato are discussed, 

 and results obtained with home-mixed and factory-mixed fertilizers in cooperative 

 potato culture tests are reported. 



The formula used at Brunswick consisted of 500 lbs. of screened tankage, 200 lbs. 

 of cotton-seed meal, LOO lbs. of nitrate of soda, 400 lbs. of acid phosphate, and 200 

 lbs. of sulphate of potash. No general comparison of the factory ami home mixed 

 fertilizers was made, hut the latter gave satisfactory returns. The author believes 

 that the modification suggested in Bulletin 107 of the station (E. S. R., L6, p. 057) 

 would have been advantageous in most instances. 



in a second locality the formula used for home-mixing contained 420 lbs. of 

 screened tankage, 4oo lbs. of acid phosphate, 200 10s. of cotton-seed meal, 200 lbs. 

 of sulphate of potash, and 100 lbs. of nitrate of soda. A comparison of the home- 

 mixed and ready-mixed fertilizers was made. Large crops were in general secured 

 from the home-mixed application, hut the vines remained green and succulent later 

 in the season and were more subject to frost than the crops receiving the ready- 

 mixed fertilizers, which consequently produced larger and better ripened tubers. 

 This result is considered due to too much slowly available nitrogen and too little 

 available phosphoric acid in the home-mixed fertilizer. To remedy this condition 

 the modifications referred to above are recommended. 



Investigation of Swedish root crops, II. Juhlin-Dannfelt and H. G. Soder- 

 baum (A'. Landt. Akad. Handl. or/, Tidskr., 43 (1904), No. l-.\ pp. 42-95).— Compara- 

 tive variety 0->t< of carrots, mangels, kohl-rabi, and fodder beets grown indifferent 

 counties of Sweden. — v. w. woll. 



Report on experiment with varieties of swedes in 1902, W. Bruce (E<lin- 

 burgh and East of Scotland Gol. Agr. Bid. 1, pp. 24). — Cooperative tests with 10 varie- 

 ties of swedes were made on 5 farms. 



The variety Queen stood first in tonnage and yield of dry matter as well as in value 

 per acre. The yield of roots ranged from 20 tons 19 cwt. 72 lbs. to 20 tons 4 cwt. 27 

 lbs. per acre, and the yield of dry matter from 48 cwt. 101 lbs. to 63 cwt. 75 lbs. 

 Queen ranked second in quality, while Springwood, although fourteenth in yield, 

 ranked first by only a nominal margin. The author recommends that each farmer 

 test several varieties to determine those besl suited to his farm. The chemical com- 

 position of all varieties determined from samples grown at the different farms is 

 shown in tables. 



Proceedings of the first annual convention of the American Beet Sugar 

 Association ( Proc. Ann. Conv. Amer. Beet Sugar Assoc., l ( 1904), /'/>■ 105, figs. 6). — 

 Papers and discussions treating of diseases and insect enemies of the su<_ r ar beet, 

 American-grown sugar-beet seed and beet seed production in general, soil adapted 

 to the sugar beet, and the culture of the crop. 



Unusual yields of rye, J. Kuhn ( Ber. Physiol. Lab. Landw. Inst. Halle, 1904, 

 No. 17, pp. 8). — A number of high yields of rye on record are mentioned, and a fer- 

 tilizer experiment is reported in which a plat receiving a heavy dressing of barnyard 

 manure yielded at the rate of 5,100 kg. of rye and 6,005 k<_ r . of straw per hectare. 



