Influence of Certain Soil Factors On the Growth of Tree Seedlings And Wheat
Influence of Certain Soil Factors On the Growth of Tree Seedlings And Wheat
Barrington Moore
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Records of the rate of growth on the limed soils are consequently based on a much smaller number of plants than those for unlimed soils. Toxicity of burnt lime, though marked throughout the season, seems to have diminished somewhat in intensity by about July 17, or about 40 days after the exposure of the soil to the weather. It is curious that the lime seemed to nullify to a considerable extent the beneficial influence of the humus. This may be due, in part at least, to the heavier application ...of lime received by the humus as compared with that given the other soils of the series. The tops of a few individual plants showed the effect of the lime by becoming nearly white, not yellowish white. The stems, particularly on the sand and mixture of sand and humus, were short and crooked, and often the plants were lying prone against the soil, though alive and growing. Root growth was very markedly affected by the lime. Back of the normal colored growing tip the root became brown and shriveled, sometimes for its entire length; often it would be unnaturally twisted, and in many cases the upper part came out of the ground and lay on the surface, the stem of the January, 1922 GROWTH OF TREE SEEDLINGS AND WHEAT 79 plant turning upward.
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