34 EXPERIMENT STATION RECORD. 



^*1ipproximately r),000 acres were grown. The results of fertilizer experiments 

 show that commercial fertilizers are not yet necessary in cotton cnlture, and the 

 author advises that the cotton seed be fed to stock and the land enriched by the 

 use of the manure. 



Report on manuring of hay, 1906, K. P.. Greig {Aberdeen and A'o. of Scot. 

 Col. Afn: Bill. .'). pp. 13. d(/ins. 2). — Results of cooperative fertilizer experimejits 

 in 1904 and 1905 are tabulated and briefly noted. It was shown that a complete 

 fertilizer of nitrate of soda, superphosphate, and sulphate of potash given at thie 

 rate of about 4 cwf. per acre produced the largest crop and the largest profit in 

 one application. Nitrogen was found essential and i)0tash more necessary 

 than phosphates. Superiihosphate and basic slag were more useful than bone 

 meal and ground Florida i)hosphates in the first year's application. Sulphate 

 of potash and all the i)hospliatic manures showed considerable residual value. 



Cultural methods for sugar beets, W. II. Oi-iN (Colorado Sta. Bui. 109, pp. 

 12, figs.' 3) .—This bulletin points out the progress made in the culture of sugar 

 beets in the State and records the methods practiced' by the mcst successful 

 sugar-beet growers, as shown by question circulars sent to 1,000 farmers dis- 

 tributed over 3 beet-growing regions of Colorado. From the answers, received 

 it was found that 54 per cent of the growers practiced spring plowing, that 

 usually early planting is best for yield and quality, and that nearly all those 

 reporting used from 15 to 20 lbs. of seed per acre. The average space, between 

 the plants in tlie rows is 10.4 in., and the best average results were secured 

 where the crop was cultivated 3 times. The average tonnage for 1904 is given 

 as 17.4 tons, and for 1905 as 14.25 tons per acre. The average expense per acre 

 is estimated at i?33.05. Various other brief statements regarding the culture 

 of this crop are also given. 



Progress of the beet-sugar industry in the United States in 1905, C. F. 

 Saylor' (V. H. Depf. Agr. Rpt. 82, pp. 130, figs. .'>). — A general review of the 

 beet-sugar industry for the year is given and discussions on the conditions 

 favorable to the establishment of the industry, the culture of the sugar beef,, 

 cliniatic conditions, and farm and factory results, together with the pi'o.bable 

 future of the industry in this" country by States are presented. Statistic^, of 

 the sugar industry in the United States and the world i,it large are also ^iy.©ii. 

 Sugar-beef investigations in 1905 by the Bureau of Plant, Industry rof ihi» 

 Department are briefly described. . r'_ (i-,i^ 



The total number of factories operating in 1905 was. 52. Four were, idle 



during the year, and in March, 1906, 12 factories were in building. j^L.^tato-' 



lated sunuuary' of" the results for 1905 shows that a total of 307,364 acres of 



beets averaging a yield of 8.67 tons per acre were harvested. The totaK.qu^n-, 



tity of beets worked was 2,605,913 tons,' producing 312,920.60 tons Q.f |5U2^Ar.^ 



The average sugar content of the beets was 15.33 per cent, the average UUVWy 



coefficient 82.96, tlie average length of the' campaign 76.6, dqys, and,, the e^U-. 



mated average extraction of sugar 11.74 per cent. ' ,' ' . 



. - -M ,i;lr(ii<iq t av. 



Reports from agriculturists at sugar factories show brieflv how. irrigation 



- - ■ " ' 9i> yi 'Fiji' I. i! ) 



was prctcticed in connection with beet growing, and reports from Sfat^ exne;"i-, 



ment stations summarize the recent experimental \^ork, carried on ,by tWsp, 



institutions. 



The work in growing single-gerin beet seed has reached a point where strains, 

 have been secured producing approximately 25 per cent of single-germ seed. • 



It is reported that during the year blight or leaf spot in the Eastern States 

 and curly top in the Rocky Mountain and Pacific Coast areas did serious 

 damage. It has been shown that the blight niay be prevented by spraying with 

 Bordeaux mixture. No definite cause for the curly top has as yet been worked 



