Abstract
IN the course of work promoted by the Agricultural Research Council on mineral deficiency, wheat and other crops on Romney Marshes responded in 1944 to diagnostic injections1 of compounds of manganese, iron, boron, copper, zinc and nickel. Field experiments on a factorial pattern were carried out in 1945 to test the significance of these diagnoses. All the crops (wheat, potatoes and broad beans) that were sprayed with solutions containing these elements gave increases in yield for each of the six elements. All these increases in yield were statistically significant and economically important ; except that for copper and zinc on wheat the odds were only 14: 1 and 11: 1 respectively that the effect was not due to chance. A non-factorial experiment on cabbages gave corresponding results but at a low level of significance.
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References
Roach, W. A., Imp. Bur. of Hort. and Plant Crops, Tech. Comm. No. 10 (1938).
Thompson, S. G., and Roberts, W. O., Rep. E. Malling Res. Stat. for 1944, 60 (1945).
Schreven, O. A., Med. Landbouwhoogeschool, 43, No. 1. 166 (1939).
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ROACH, W., BARCLAY, C. Nickel and Multiple Trace Element Deficiencies in Agricultural Crops. Nature 157, 696 (1946). https://doi.org/10.1038/157696a0
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DOI: https://doi.org/10.1038/157696a0
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