bean cake and soy beans from Dalny for the months ending March 31st had been, in 1909, only $1,635,000, gold, compared with $3,065,000 in the corresponding period of 1908, and of $5,120,000 in 1907, showing a marked decrease.
Edward C. Parker, writing from Mukden for the Review of Reviews, stated: “The bean cake shipments from Newchwang, Dalny and Antung in 1908 amounted to 515,198 tons; beans, 239,298 tons; bean oil, 1930 tons; having a total value of $15,016,649 (U. S. gold)”.
According to the composition of soy beans as indicated in Hopkins' table of analyses, these shipments of beans and bean cake would remove an aggregate of 6171 tons of phosphorus, 10,097 tons of potassium, and 47,812 tons of nitrogen from Manchurian soils as the result of export for that year. Could such a rate have been maintained during two thousand years there would have been sold from these soils 20,194,000 tons of potassium; 12,342,000 tons of phosphorus and 95,624,000 tons of nitrogen; and the phosphorus, were it thus exported, would have exceeded more than threefold all thus far produced in the United States; it would have exceeded the world's output in 1906 more than eighteen times, even assuming that all phosphate rock mined was seventy-five per cent pure.
The choice of the millets and the sorghums as the staple bread crops of northern China and Manchuria has been quite as remarkable as the selection of rice for the more southern latitudes, and the two together have played a most important part in determining the high maintenance efficiency of these people. In nutritive value these grains rank well with wheat; the stems of the larger varieties are extensively used for both fuel and building material and the smaller forms make excellent forage and have been used directly for maintaining the organic content of the soil. Their rapid development and their high endurance of drought adapt them admirably to the climate of north China and Manchuria where the rains begin only after late June and where weather too cold for growth comes earlier in the fall. The quick maturity of these crops
