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Effect of Zinc Sulfate Added to Copper‐Lime Spray on the Yield of Potatoes on Indiana Muck Soil
Author(s) -
Ellis N. K.
Publication year - 1945
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1945.036159950009000c0020x
Subject(s) - muck , lime , yield (engineering) , copper sulfate , horticulture , mathematics , copper , chemistry , environmental science , soil science , metallurgy , materials science , biology , organic chemistry
SEVERAL zinc compounds have been used within the last few years to satisfy a deficiency or to control disease and insects on vegetable crops. Forsee and Neller (2) reported that corn responded favorably to the addition of zinc sulphate to the fertilizer used on Florida peat. Beckenbach and Kelbert (i), also in Florida, controlled a deficiency disease of tomato by spraying the leaves with zinc sulfate at the rate of 2 pounds per 100 gallons of water. Harmer (3) describes zinc deficiency on onions growing on Michigan muck land and recommended an application of 50 pounds of zinc sulfate per acre on new land that is to be planted to this crop. Heuberger and Wolfenbarger (5) used zinc dimethyl dithiocarbamate and zinc sulfate in experiments to control early blight and leaf hopper on Irish potatoes. They suggested that the addition of zinc sulfate and lime i—J^—100 to any organic or inorganic fungicide increased the leaf hopper control by 20%. In 1940 it was observed that zinc sulfate added to the regular copper-lime spray imparted a blue-green cast to the potato foliage on Indiana muck soil. The spray was applied only a month before harvest and no differences in yield resulted. From 1941 to 1944, inclusive, zinc sulfate was added to the regular spray in amounts equal to the copper sulfate used. In 3 of the 4 years significant increases in yield resulted. The data here reported are 'intended as a progress report, since no work has been done on quantities of the material best suited for use on the crop.