Introduction of wedge-shaped belt
Jul 05, 2018

K+ in the wedge-shaped area is a component of exchangeable potassium in soil. Once the edge of clay mineral is formed, the fixed strength of exogenous potassium will increase. The wedge zone can be formed during the Depotassium weathering process of mica, and can also be formed by inhomogeneous contraction of the crystalline layer after the potassium ion or ammonium ion in the soil solution into the complex three square meshes between the expansive mineral layers. In addition, when lime is used to increase the pH of acid soil, the loss of polymeric hydroxyl aluminum between the mineral layers leads to the collapse of the crystalline layer and the formation of the wedge area.

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