Summary
The effects were studied of hydrogen-ion concentration, calcium and manganese supply on the yield of lucerne in both agar and water culture. One agar experiment allowed the effects of two light intensities and two temperatures, on these factors, to be investigated.
The toxicity of pH 4 was found to vary, and calcium and nitrogen levels, culture method and climatic conditions were considered contributory factors. The high manganese supply was also found to vary in its toxicity, the most adverse effects being at pH 6, a low calcium supply and a high light intensity. Where the toxicity was most severe the usual orange-brown spotting symptoms were replaced by a chlorosis. Some chemical analyses of the manganese contents of the plants grown under these conditions are reported.
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The data given here are taken from the thesis submitted by C. D. Sutton for the degree of Ph. D. of the University of Nottingham.
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Sutton, C.D., Hallsworth, E.G. Studies on the nutrition of forage legumes. Plant Soil 9, 305–317 (1958). https://doi.org/10.1007/BF01343828
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DOI: https://doi.org/10.1007/BF01343828