Soil structure and management: a review Export

@article{citeulike:5054434, abstract = {Soil structure exerts important influences on the edaphic conditions and the environment. It is often expressed as the degree of stability of aggregates. Aggregation results from the rearrangement, flocculation and cementation of particles. It is mediated by soil organic carbon (SOC), biota, ionic bridging, clay and carbonates. The complex interactions of these aggregants can be synergistic or disruptive to aggregation. Clay-sized particles are commonly associated with aggregation by rearrangement and flocculation, although swelling clay can disrupt aggregates. Organo-metallic compounds and cations form bridges between particles. The SOC originates from plants, animals and microorganisms, and their exudates. It enhances aggregation through the bonding of primary soil particles. The effectiveness of SOC in forming stable aggregates is related to its decomposition rate, which in turn is influenced by its physical and chemical protection from microbial action. Soil inorganic carbon (SIC) increases aggregation in arid and semi-arid environments, and the formation of secondary carbonates is influenced by the presence of SOC and Ca 2+ and Mg 2+ . Soil biota release CO 2 and form SOC which increase dissolution of primary carbonates while cations increase precipitation of secondary carbonates. The precipitation of (hydr)oxides, phosphates and carbonates enhances aggregation. Cations such as Si 4+ , Fe 3+ , Al 3+ and Ca 2+ stimulate the precipitation of compounds that act as bonding agents for primary particles. Roots and hyphae can enmesh particles together while realigning them and releasing organic compounds that hold particles together, a process with a positive impact on soil C sequestration. Soil structure can be significantly modified through management practices and environmental changes. Practices that increase productivity and decrease soil disruption enhance aggregation and structural development.}, author = {Bronick, C.}, citeulike-article-id = {5054434}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.geoderma.2004.03.005}, citeulike-linkout-1 = {http://linkinghub.elsevier.com/retrieve/pii/S0016-7061(04)00089-8}, doi = {10.1016/j.geoderma.2004.03.005}, issn = {00167061}, journal = {Geoderma}, keywords = {aggregate, aggregation, carbon, dynamics, land, management, quality, sequestration, soil, structure, use}, month = {January}, number = {1-2}, pages = {3--22}, posted-at = {2009-07-04 12:33:37}, priority = {5}, title = {Soil structure and management: a review}, url = {http://dx.doi.org/10.1016/j.geoderma.2004.03.005}, volume = {124}, year = {2005} }

TY - JOUR ID - citeulike:5054434 L3 - citeulike-article-id:5054434 N2 - Soil structure exerts important influences on the edaphic conditions and the environment. It is often expressed as the degree of stability of aggregates. Aggregation results from the rearrangement, flocculation and cementation of particles. It is mediated by soil organic carbon (SOC), biota, ionic bridging, clay and carbonates. The complex interactions of these aggregants can be synergistic or disruptive to aggregation. Clay-sized particles are commonly associated with aggregation by rearrangement and flocculation, although swelling clay can disrupt aggregates. Organo-metallic compounds and cations form bridges between particles. The SOC originates from plants, animals and microorganisms, and their exudates. It enhances aggregation through the bonding of primary soil particles. The effectiveness of SOC in forming stable aggregates is related to its decomposition rate, which in turn is influenced by its physical and chemical protection from microbial action. Soil inorganic carbon (SIC) increases aggregation in arid and semi-arid environments, and the formation of secondary carbonates is influenced by the presence of SOC and Ca 2+ and Mg 2+ . Soil biota release CO 2 and form SOC which increase dissolution of primary carbonates while cations increase precipitation of secondary carbonates. The precipitation of (hydr)oxides, phosphates and carbonates enhances aggregation. Cations such as Si 4+ , Fe 3+ , Al 3+ and Ca 2+ stimulate the precipitation of compounds that act as bonding agents for primary particles. Roots and hyphae can enmesh particles together while realigning them and releasing organic compounds that hold particles together, a process with a positive impact on soil C sequestration. Soil structure can be significantly modified through management practices and environmental changes. Practices that increase productivity and decrease soil disruption enhance aggregation and structural development. IS - 1-2 JF - Geoderma SN - 00167061 EP - 22 TI - Soil structure and management: a review VL - 124 SP - 3 KW - aggregate KW - aggregation KW - carbon KW - dynamics KW - land KW - management KW - quality KW - sequestration KW - soil KW - structure KW - use AU - Bronick, C PY - 2005/01// UR - http://dx.doi.org/10.1016/j.geoderma.2004.03.005 ER -