“There is no established rule for measuring round stacks, but this one will approximate the contents of one of the ordinary conical form: Find the circumference at or above the base or ‘bulge’ at a height that will average the base from there to the ground, find the vertical height of the measured circumference from the ground and the slant height from the circumference to the top of the stack. Multiply the circumference by itself and divide by 100 and multiply by 8, then multiply the result by the height of the base plus one-third of the slant height of top. The hay in a round is necessarily less compact than in a rectangular stack, hence a greater number of feet should be allowed for a ton; with well settled hay, probably 512 feet. “The rules given may also be used in measuring any kind of hay, sorghum or Kafir-fodder in the stack. However, for sorghum or Kafir-fodder only approximate results can be procured by stack measurements because the fodder is apt to vary greatly in weight, according to the moisture it contains.” [Illustration: =Pot Culture Experiments at University of Illinois= showing effect produced upon growth of alfalfa by nitrogen-gathering bacteria obtained from older alfalfa and Sweet clover. Reading from top to bottom the four photographs were made five, six, seven and eight weeks, respectively, from time of planting +----------------------------------------------+ |Bottom row, signs from left to right: | |ALFALFA. No Bacteria. | |ALFALFA. Bacteria from Alfalfa soil. | |ALFALFA. Bacteria from Alfalfa Tubercles. | |ALFALFA. Bacteria from Sweet Clover Soil. | |ALFALFA. Bacteria from Sweet Clover Tubercles.| +----------------------------------------------+] [Illustration: =Six Months Growth of Alfalfa Foliage= grown from one crown under irrigation in southern California, sixty feet below sea level Height slightly less than eleven feet] _CHAPTER XXVI._ Practical Experiences of Alfalfa Growers in the United States of America ALABAMA