970 EXPERIMENT STATION RECORD. 



seedless hops were often to be found on the same vine, and it is believed that pollen 

 was probably not available when the late hops were readyfor pollination, and in 

 order to obtain all the hops on a vine in a well-developed condition pollen must be 

 available during the whole flowering period. Further investigations showed that 

 mold did more damage to tbe seedless hops than to those producing seeds. Tbe 

 advantages of growing seed hops as indicated by these investigations are the produc- 

 tion of large, heavy, bright-colored, and well-grown specimens, early ripening, and 

 increased mold-resisting power; and the disadvantages, the space taken up and the 

 trouble involved in growing suitable male plants, the possible difference in brewing 

 value between seed and seedless hops, and the possibility of the more rapid exhaus- 

 tion of the hills through the more frequent formation of perfect seeds. The directs >ns 

 in which further work on this subject should be carried out are briefly noted. 



Experiments were made with Bordeaux mixture as a remedy for mold. The effect 

 was twofold; the mold was destroyed on the infected leaves and prevented on the 

 sprayed leaves, while the foliage of the treated plants turned to a darker green, this 

 difference in color being perceptible until the end of the season. 



The disadvantage in the Butcher system of training, as observed by the author, is 

 that the angle made by the breast wire tends to harbor lice and mold which are not 

 touched in spraying. The use of the thermometer in hop-drying experiments is 

 described and the relative value of different methods of obtaining the temperature 

 records are compared. 



At Selling, where the fertilizer experiments are in their eighth year, in 1903 a plat 

 receiving barnyard manure at the rate of 30 loads per acre gave nearly half a cwt. 

 more hops than a plat receiving a thin dressing every year, and both these plats were 

 considerably in advance of one treated with commercial fertilizers only. In 1904 all 

 3 plats gave practically the same yield. 



At Frant in the sixth year of the work gypsum gave the most marked results, 10 

 cwt. of the substance per acre giving an increase of 2\ cwt. of dried hops over the 

 check plat. These results are similar to those obtained in previous years. Sulphate 

 of potash at the rate of 5 cwt. per acre has given an average increase in yield of lj 

 cwt., and as in previous years, produced a greater vigor of growth and delayed ripen- 

 ing of the hops, with a consequent loss of brightness in the sample. 



The results obtained at Farnham during a series of years show a marked effect 

 produced by lime on a soil deficient in carbonate of lime. As in previous years, the 

 culture experiments at Goudhurst show that the plat receiving no cultivation gave 

 the highest yield. 



Culture of legumes and the nitrogen question, F. Hansen ( Ugeskr. Landm., 

 50 (1904), Nos. 44, pp. 493-495; 45, pp. 510-513).— A discussion of the value of differ- 

 ent forage plants, with special reference to the protein content. — f. w. woll. 



Temperature in its relation to storing potatoes, F. Parisot {Jour. Agr. Prat., 

 n. ser., 8 (1904), No. 50, pp. 763-705; abs. in Rev. Hort. [Paris], 77 (1905), No. 1, p. 

 S). — A temperature of 8° C. is considered the best for storing potatoes, either for use 

 as food or for seed. At this temperature the respiratory combustion and the forma- 

 tion of starch are considered as offsetting the formation of sugar, and that at a higher 

 temperature the quantity of sugar is smaller and at a lower temperature greater. 

 At a higher temperature, therefore, no appreciable quantity of glucose and saccharose 

 would be present, while at a lower temperature the formation of sugar would be 

 greater than the quantity consumed in the processes of respiration and starch forma- 

 tion. The sweetish taste developed in stored potatoes is attributed to this cause and 

 is believed not to be necessarily due to freezing. 



On the culture of sugar beets in central Sweden, S. Rhodin (K. Landt. Akad. 

 Handl. och Tidskr., 43 (1904), No. 1-2, pp. 20-4%). — A discussion of the adaptability 

 of this region for sugar-beet culture, leading to the recommendation of the growing 

 of this crop for the manufacture of sugar or for feeding farm animals. — f. w. woll. 



