胶水
发表于 2025-3-27 00:46:13
https://doi.org/10.1007/978-3-662-12172-6The activities of earthworms that have most influence on soil structure are: (1) Ingestion of soil, partial breakdown of organic matter, intimate mixing of these fractions, and ejection of this material as surface or sub-surface casts. (2) Burrowing through the soil and bringing subsoil to the surface.
Fermentation
发表于 2025-3-27 04:46:53
Biology,It should be emphasized that our present knowledge of the life cycles of even quite common earthworms is very inadequate, and requires much more study.
Yourself
发表于 2025-3-27 06:57:16
Earthworms and soil fertility,The activities of earthworms that have most influence on soil structure are: (1) Ingestion of soil, partial breakdown of organic matter, intimate mixing of these fractions, and ejection of this material as surface or sub-surface casts. (2) Burrowing through the soil and bringing subsoil to the surface.
类似思想
发表于 2025-3-27 11:45:41
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老人病学
发表于 2025-3-27 17:27:41
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burnish
发表于 2025-3-27 20:33:53
Kommutative algebraische Gruppen und Ringeany other aspects of their biology. The reader is referred to a comparatively recent text, ‘The Physiology of Earthworms’ by M. S. Laverack (1963), for a more detailed treatment than is possible in the present work.
国家明智
发表于 2025-3-27 23:39:16
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SPASM
发表于 2025-3-28 04:41:06
https://doi.org/10.1007/978-3-642-91481-2imal residues may be decomposed by the microflora but much organic matter, particularly the tougher plant leaves, stems and root material, does not breakdown without first being disintegrated by soil animals and acted upon by enzymes in their intestines. Earthworms have an important role in this ini
TIA742
发表于 2025-3-28 10:09:39
Rhonda Brown,Einar Thorsteinssonhe worms live. For instance, Bassalik (1913) isolated more than fifty species of bacteria from the alimentary canal of ., but found none that differed from those in the soil from which the worms had been taken. This was confirmed for three species of earthworms by Parle (1963), who reported that mos
外星人
发表于 2025-3-28 12:24:50
https://doi.org/10.1007/978-3-662-12172-6ge during cultivation, to the loss of the insulating layer of vegetation, or to a decreased supply of food as the organic matter content gradually decreases. Many workers have considered that these differences are largely due to mechanical damage during cultivation. When old grassland is ploughed, t