dapper
发表于 2025-3-28 16:03:19
Soil formation pedology, geomorphology and geochemisty. In the present context of understanding how soils form, the state factor equation of Jenny (1941), although later modified (Jenny 1961), offers a reasonable and straightforward framework for organising ideas. It is emphasised that the equation is purely a sy
justify
发表于 2025-3-28 19:09:38
Soil matrix and soil waterar series of pores permeating the mass. The geometry of sphere packing (Figure 8.1) shows that as the spherical particles get smaller, the surface area of the system increases and the size of the interstitial spaces decreases. The total interstitial volume of such systems trend towards 20–25% of the
时间等
发表于 2025-3-29 00:01:49
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sultry
发表于 2025-3-29 05:24:05
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eustachian-tube
发表于 2025-3-29 10:15:15
The autecology of two contrasting speciesies, unless carried out in a rigorously comparative frame of reference, may not repay the effort expended. In these two cases the species selected are representative of wider themes, and each study ought to stimulate further work.
车床
发表于 2025-3-29 12:12:12
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Morose
发表于 2025-3-29 15:46:14
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Choreography
发表于 2025-3-29 23:00:33
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有组织
发表于 2025-3-29 23:59:00
Mineral composition of plant tissues and the function of ionson in the elemental composition of tissues, which can be dealt with under three headings: technical, biological and environmental. Some topics will be expanded on in other sections, and this section should be regarded as little more than an annotated checklist.
fetter
发表于 2025-3-30 04:57:48
Soil atmosphere and soil temperaturel concentrations of oxygen and carbon dioxide in the soil atmosphere are the result of the rates of absorption or production by soil ‘surfaces’, the steepness of the diffusion gradient, the rate of diffusion and the length of the diffusion pathway.