The New Encyclopędia Britannica, Volume 19Encyclopaedia Britannica, 1981 - Encyclopedias and dictionaries |
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Page 281
... soil surface . Topography . Many grassland regions are character- ized by level to gently undulating topography . Often , however , the land surface is sufficiently irregular to pro- vide variations in microclimate that result in a ...
... soil surface . Topography . Many grassland regions are character- ized by level to gently undulating topography . Often , however , the land surface is sufficiently irregular to pro- vide variations in microclimate that result in a ...
Page 286
... soil mi- croflora ( microscopic plants , including fungi and bac- teria ) is the single most important group of organisms af- fecting the turnover of energy . The biomass of soil micro- flora has been estimated to be 400 to 600 grams ...
... soil mi- croflora ( microscopic plants , including fungi and bac- teria ) is the single most important group of organisms af- fecting the turnover of energy . The biomass of soil micro- flora has been estimated to be 400 to 600 grams ...
Page 878
... soil wash depends on two factors : the frequency of occurrence and depth of over- land flow , and the resistance offered by soil particles to movement by the flow . In very dry areas , soil wash is small because overland flow is rare ...
... soil wash depends on two factors : the frequency of occurrence and depth of over- land flow , and the resistance offered by soil particles to movement by the flow . In very dry areas , soil wash is small because overland flow is rare ...
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