Impact of moisture pressure, specific surface and voids pattern on moisture availability for plants
1994
Zajtseva, R.I. | Sudnitsyn, I.I.
Vegetation experiments with barley on different quartz fractions, loams, sands, serozem and chernozem revealed a good correlation between guttation and relative plant growth. These parameters may be used to specify intervals of substrate moisture conditions corresponding to categories of moisture availability for plants. A drastic decrease of gittation (2 times) and growth under excessive moistening coincides with the soil moisture capillary pressure corresponding to sharp increase of air penetrability into soil. There is a linear correlation between logarithms of the latter phenomenon and of the predominant granulometric fraction. With lower soil moisture content the critical sorption-capillary moisture pressure when guttation stops, proves to be in direct correlation with the specific surface of the soil solid phase
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