_Quantity of Water to Use._--Good judgment is necessary in applying water to crops in regard to quantity, as well as the time of making application. Generally speaking, it is better to wait until the crop really needs moisture. When the pump is started give the crop plenty with the expectation that one irrigation will be sufficient. Much depends upon the amount of moisture in the soil; also the kind of crop and weather conditions enter into the problem. On sandy land that is very dry where drainage is good, water may be permitted to run in the corrugations for several days until the ground is thoroughly soaked. When potatoes are forming, or clover is putting down its big root system, a great deal of water is needed. Irrigation sufficient to make two inches of rainfall may be used to advantage for such crops under ordinary farming conditions. It is necessary after each irrigation to break the soil crust by cultivation to prevent evaporation. This is just as important after irrigation as it is after a rain shower. Also any little pockets that hold water must be carefully drained out, otherwise the crop will be injured by standing water. We are not supposed to have such pockets on land that has been prepared for irrigation. _Kind of Crops to Irrigate._--Wheat, oats, barley, etc., may be helped with one irrigation from imminent failure to a wealth of production. But these rainfall grain crops do not come under the general classification that interests the regular irrigation farmer beyond his diversity plans for producing considerable variety. Fruits, roots, clover, alfalfa, vegetables and Indian corn are money crops under irrigation. Certain seed crops yield splendidly when watered. An apple orchard properly cared for and irrigated just at the right time will pay from five hundred to a thousand dollars per acre. Small fruits are just as valuable. These successes account for the high prices of irrigated land. In the East and in the great Middle West, valuable crops are cut short or ruined by drouth when the fruit or corn is forming. It makes no difference how much rain comes along at other times in the year, if the roots cannot find moisture at the critical time, the yield is reduced often below the profit of raising and harvesting the crop. Strawberry blossoms shrivel and die in the blooming when rain fails. Irrigation is better than rain for strawberries. Strawberries under irrigation may be made to yield more bushels than potatoes under humid conditions. One hundred bushels of strawberries per acre sounds like a fairy tale, but it is possible on rich land under irrigation.