. Proceedings of the American Society of Agronomy . 1.—Three types of evaporimeters, for growing plants to maturity. jar placed beside it. After the plant is well started, gravel is placedon the surface to prevent the rise of water by capillarity, and thewhole is covered with a metal lid. In the case of large plants likemaize, the water is prevented from running down the stalk of theplant into the can by the use of sculptors clay,^ which is quite adhe-sive and is plastered around the base of the plant and over the lid,as illustrated in Fig. 47. Plate III, Fig. i, shows one of the 5-gallonjar e
. Proceedings of the American Society of Agronomy . 1.—Three types of evaporimeters, for growing plants to maturity. jar placed beside it. After the plant is well started, gravel is placedon the surface to prevent the rise of water by capillarity, and thewhole is covered with a metal lid. In the case of large plants likemaize, the water is prevented from running down the stalk of theplant into the can by the use of sculptors clay,^ which is quite adhe-sive and is plastered around the base of the plant and over the lid,as illustrated in Fig. 47. Plate III, Fig. i, shows one of the 5-gallonjar evaporimeters in section with the apparatus necessary for makingwater determinations. This apparatus has been used for growingcorn plants almost to maturity, with very good success. Field Methods for Determining the Loss of Water from Field Crops. Fig. 42 illustrates the method used by King at the Wisconsin Sta-tion. At first, vinegar barrels were sunk into the midst of the fields ^ Composite molding clay. A. H. Abbott and Co., Chicago. Plate Fig. I.—An evaporimeter made from a five-gallon jar (shown in section)with apparatus necessary for making determinations. (Courtesy NebraskaExp. Sta.)
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