. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 544 ROOT CROPS ROOT CROPS ter. In the case of sugar-beets, in 1904 the aver- age amount of sugar obtained from one ton of beets by the factories and rasping stations in the United States was 230 pounds. From these data it. Fig. 777. Tellow-fleshed Globe mangel. In each "'compart- ment" the upper figure gives the percentage of dry matter, the middle figure the percentage of sugar, and the lower figure the percentage of nitrogen. (Wood & Berry.)
. Cyclopedia of farm crops, a popular survey of crops and crop-making methods in the United States and Canada;. Farm produce; Agriculture. 544 ROOT CROPS ROOT CROPS ter. In the case of sugar-beets, in 1904 the aver- age amount of sugar obtained from one ton of beets by the factories and rasping stations in the United States was 230 pounds. From these data it. Fig. 777. Tellow-fleshed Globe mangel. In each "'compart- ment" the upper figure gives the percentage of dry matter, the middle figure the percentage of sugar, and the lower figure the percentage of nitrogen. (Wood & Berry.) is evident that the average percentage of dry mat- ter contained must have been over 2 per cent greater than that given in the above table, and in many states the beets average 18 to 20 per cent dry matter, while 30 per cent with 24 per cent of sugar has been attained with individual roots. Improvement. During the past fifty years the amount of sugar which can be obtained from a ton of sugar-beets has been increased from about 100 or 150 pounds to 250 pounds or more, a gain of over 100 per cent. Part of this gain is due to better methods of man- ufacture and part to better beets. The percentage of sugar in the beets has been increased from an average of be- tween 5 and 10 per cent in 1805, to an average of 14 to 18 per cent, and 24 per cent has now been attained in individual roots, a gain due largely to a right method of selec- tion. In selecting sugar-beets,a high sugar content has been insisted on and the sugar con- tent of "mother beets" has been determined before they were saved for seed produc- tion. The use of the saccharimeter and a reliable method of coring have given valuable results. With mangels there has been no method of im- provement, and roots were selected because of their shape or the color of their skin, no attention being paid to their dry-matter content, although it is for the dry matter that they are grown. To- day, it is urged that all roots th
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