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The reaction of spring wheat varieties during advance of soil drought is studied. Disparity of the critical period of ontogeny is shown and it is established that depression of variety productivity depends on the degree of rudimentary spike development upon reaching the permanent wilting point of the plants.
Under conditions of a pot experiment, the authors assessed the effect of various environmental conditions: three levels of nitrogen nutrition and temperature and light conditions on assimilation of nitrates in wheat plants differing in stem height. It is found that the need for nitrates in short-stemmed varieties is lower than in tall varieties under… (More)