Compatriot
发表于 2025-3-25 04:36:15
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施魔法
发表于 2025-3-25 08:26:15
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物质
发表于 2025-3-25 12:19:42
R. Szibor,I. Plate,E. Kirches,D. KrauseChemical composition of soil decides the chemical behaviour. Chemical behaviour is defined as the totality of (physico-) chemical reactions occurring between these constituents (and possibly other materials added to the soil .) (Bolt and Bruggenwert, 1976). The soil components are given in Fig. 13.1.
遭遇
发表于 2025-3-25 18:36:02
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CLOWN
发表于 2025-3-25 20:58:23
Die Prozeßbibliothek in UmbertoThe pH describes the chemical condition of the soil in terms of acidity and alkalinity and is a clue to treat the soil for necessary requirement. It gives a very significant indication about the soil status. Danish biochemist S.P.L. Sorenson introduced the system of pH for expressing the acidity or alkalinity of solutions.
Sciatica
发表于 2025-3-26 00:26:57
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落叶剂
发表于 2025-3-26 07:13:06
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抒情短诗
发表于 2025-3-26 08:40:51
Soil TillageTillage comes from the ‘Anglo-Saxon’ words . and ., meaning ‘to plough and prepare the soil for the seed to sow, to cultivate and to raise crops’. Jethro Tull, an English agriculturist, is considered the father of tillage. He suggested that ploughing is necessary to make the soil into fine particles.
讨好美人
发表于 2025-3-26 15:21:35
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恶心
发表于 2025-3-26 17:44:23
Ion ExchangeIon exchange in soil is a reversible chemical reaction which involves interchange of equivalent amount of ions between two phases in equilibrium in contact. Such exchange takes place between a soil solid phase and soil solution phase. When cations are involved, such a process is called . and . when anions are involved.