. Certain effects under irrigation of copper compounds upon crops. Plants; Copper solutions, Physiological effect of. 434 University of California Publications in Agricultural Sciences [Vol. 1 Copper Carbonate Series (1908), Corn Sample No. 3992 3993 3994 3995 Culture Cu iu soil, per cent Corn Cheek* Corn .0] Corn .015 Corn .02 Appear- ance and Dry height matter, of plants grams Normal 43 in. 41 35 41 Cu found, grams .00058 .00049 .00171 .00397 Toxic effects begin at about .023% Cu in soil Stunted 33 in. 15 3996 3997 3998 4000 Corn Com Corn Corn .025 .05 .10 .20 22 20
. Certain effects under irrigation of copper compounds upon crops. Plants; Copper solutions, Physiological effect of. 434 University of California Publications in Agricultural Sciences [Vol. 1 Copper Carbonate Series (1908), Corn Sample No. 3992 3993 3994 3995 Culture Cu iu soil, per cent Corn Cheek* Corn .0] Corn .015 Corn .02 Appear- ance and Dry height matter, of plants grams Normal 43 in. 41 35 41 Cu found, grams .00058 .00049 .00171 .00397 Toxic effects begin at about .023% Cu in soil Stunted 33 in. 15 3996 3997 3998 4000 Corn Com Corn Corn .025 .05 .10 .20 22 20 .31 .00245 .00023 .00651 .00444 Cu roots Containing traces of copper, .0025%. Copper Carbonate Series (1908), Squash Sample No. 3937 3938 3939 4026 Toxic 3940 394] Appear- Cu ance and Dry < u in soil, height matter. found, Culture percent of plants grains grams Normal Squash check 16 in. .00016 Squash .01 16 .(10023 S,|ii;isli .025 15 .00031 Squash Chk., .01, and .025 .24 .00004 â fleets begin at about .035% Cu in soil. Blanched and stunted .05 11 in. .00017 .10 11 .00014 Squash Squash Cu tops 1 Ml.(Ml Fig. 9.âCorn cultures grown in soils containing copper as sulphide (chalco- eite), from none to 1. per cent 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. Berkeley, University of California Press
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