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Show per acre foot approximately, when applied ap-plied to one acre. Thus the profit on the water is over four times the profit on the land alone. This being the case we should figure our crop returns not In terms of acres of land but acre-inches of water. We will not then confine our fifteen acre-inches acre-inches of water to one acre of land in order that we may reap the greatest great-est possible tonnage on that one acre, but will spread it over a larger area, so that we can get greater returns from our water. For example, if we spread the fifteen acre inches over three acres of ground we will reap, according ac-cording to table No. 3, three times 13.76, or 51. 2S tons as compared with 21. S9 tons if the fifteen acre inches are confined to the one acre of land. Or, using oats as another example, we get a yield of 62 bushels of oats with a 5-inch application of water and S2 bushels with a 20-inch application. Now, if we were to spread the 20 inches over 4 acres of ground, making an application of 5 inches on each acre, we would get a yield of 4 times 62, or 248 bushels of oats on those four acres with the same amount of water that it took to produce 82 bushels bush-els on one acre. Whether or not this is a paying proposition can be determined deter-mined by solving a simple problem in arithmetic. The average cost of producing pro-ducing and harvesting an acre of irrigated irri-gated oats is about $S.00. PROBLEM III. Twenty inches of water over 1 acre produces, 82 bushels of oats. 82 bu. oats at 50c?41.00. Cost, JS.OO. $33 profit on land and water. $10.00 profit on land only. $23.00 profit on water alone. Twenty acre inches of water over 4 acres produces 248 bu. oats. 248 bu. oats at 50c$124.00. Cost on 4 acres $32.00. $92 00 profit on land and water, wa-ter, $40.00 profit on land alone. $52.00 profit on water alone. Thus the profit is more than doubled. doub-led. The maximum yield per acre of land there, is much less important than the maximum yield per acre inch of water. ECONOMICAL DISIMTl OF IRRIGATION WATER By L. M. WINSOR, Utah Agricultural College. Oregon Short Line Railroad Demonstration Dem-onstration Train Lecture. (Continued from last week.) Further experiments at the Utah experiment station give us these results: re-sults: TABLE NO. 2. Relative Amounts of Water Required by-Different Crops to Produce One Pound of Dry Matter. To produce one pound dry matter, potatoes required 1,778 pounds water. To produce one pound dry matter, oats required 1,208 pounds water. To produce one pound dry matter, wheat required 1,049 pounds water. To produce one pound dry matter, sugar beets required 1,029 pounds water. To produce one pound dry matter, corn required 753 pounds water. This table shows us not only the different amounts of water required by various crops, but also gives us an Idea of the immense quantity used by these plants for a small amount of stored up material. The results of other experiments will gi-e us still further light on the subject of the most economical amount of water to give the various plants. In Table No. 3 we see the yields of various crops as a result of the application ap-plication of different : amounts of water in terms of the depth in inches over one acre. The yields are given per acre. TABLE NO. 3. Amount of Water in Acre-Inches vs. Yield Per Acre. Average for Four Years. CROP Depth over Yield one acre per acre 5 in. xz bu. 10 in. 55 bu. Oats 15 in. 72 bu. . 20 in. 82 bu. 40 in. 79 bu. 5 in! 38 buT 7.5 in. 39 bu. 10 in. 44 bu. Wheat 15 in. 46 bu. 25 in. 49 bu. 35 in. 54 bu. 50 in. 48 bu. 7l iiT 81 bu 10 in. 92 bu., 15 in. 78 bu. Corn 20 in. 92 bu. 25 in. 99 bu. 30 in. 109 bu. 55 , in. 114 bu. 7 in. 69 bu. Barley 15 in. bu. 25 in. 66 bu. 40 in. 63 bu. 10 in. 8,828 lbs.' Alfalfa 20 in. 9,424 lbs. 25 in. 10,619 lbs. 50 in. 1-2,163 lbs. 5 in. 251 bu. Potatoes 10 in. 273 bu. 15 in. 275 bu. 20 in. 262 bu. 5 in. 13.76 tons Sugar Beets 10 in. 18.52 tons 15 in. 21.89 tons 20 in. . 19.79 tons The soil is a sandy loam with excellent excel-lent under drainage. Now, after studying this table for a minute, if I were to ask, for example: "What would be the most economical distribution of water under these conditions con-ditions for sugar beets?" many of you would answer: "At the rate of fifteen acre-inches per acre," because the fit-teen fit-teen inch application gave the greatest great-est yield. Let us look at it from a new point of view. We inferred in the opening of this talk that the value of the land is dependent to a very great extent ex-tent upon the water supply. Let us make this point a little clearer. Our land without irrigation is limited limit-ed practically to the growing of wheat. In Utah (Idaho) the yield is about 25 bushels per acre, allowing an ample am-ple margin. Taking the figures of several sev-eral leading dry farmers the average cost of producing a crop is $3. GO per acre. Example 1 is self-explanatory. EXAMPLE I. 25 bu. wheat at 6?c$lG.25. Subtracting Sub-tracting cost $5. GO, leaves $10.65 as profit on land alone. Any additional profit, then, over I $10.65 per acre which a farmer may ; obtain through irrigation is due to the irrigation and that alone. Comparing Com-paring these values we have, laking , an average crop of sugar beets as an example: j EXAMPLE II. I 20 tons at $l..r0$90.00 as the total return. Taking $31.00 as cost of pro-duction, pro-duction, we have $59.00 as the profit on land and water. After subtracting $10.65, the profit on land alone, we have $4S.35 as the profit on the water |