. Certain effects under irrigation of copper compounds upon crops. Plants; Copper solutions, Physiological effect of. 1917] Forbes: Irrigation Effects of Copper Compounds Upon Crops 417 root systems. The acid-wash and soil-correction methods give severely minimum results. The carbon dioxide wash used in the majority of analyses is laborious but more satisfactory. Water Cultures (1907) Cultures of corn, beans, and squash were grown in University of Arizona well-water containing 250 of soluble solids. Prom to parts of copper as precipitated carbonate dis- solved in carbon dioxide
. Certain effects under irrigation of copper compounds upon crops. Plants; Copper solutions, Physiological effect of. 1917] Forbes: Irrigation Effects of Copper Compounds Upon Crops 417 root systems. The acid-wash and soil-correction methods give severely minimum results. The carbon dioxide wash used in the majority of analyses is laborious but more satisfactory. Water Cultures (1907) Cultures of corn, beans, and squash were grown in University of Arizona well-water containing 250 of soluble solids. Prom to parts of copper as precipitated carbonate dis- solved in carbon dioxide were used in making cultures and the resulting growths of tops and roots were divided into the worst- poisoned and least-poisoned portions, for determinations of Fig. 3.—Com cultures, series 121-62, grown in University of Arizona well water, containing from .03 to 3. parts per million of copper as basic carbonate (Cu(OH),.CuC03). Series Corn 121-62.—Grown in well water containing Cu as Cu(OH).,.CuCO, as follows: check, , , , , , , , ;, and Cu. December 1-February 27, 1907. Series divided into two portions: a. Plants not badly poisoned; roots growing; tops showing Cu effects; , , , cultures. (Nos. 3694, 3693.) b. Plants badly poisoned; root growth arrested; tops living; , , , , and cultures. (Nos. 3692, 3691.) Scries Beans 121-66.—Grown in well water containing Cu as Cu(OH),.CuC03 as follows: check, , , , , , , , , Cu. December 9-February 27, 1907. Series divided into two portions: a. Least poisoned plants; roots nearly normal, tops normal; , , , , cultures. (Nos. 3702, 3697.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Forbes, Robert Humphrey, 1867-1968. Ber
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