Proteins from salt-loving, halophilic, microbes could be the key to cleaning up leaked radioactive strontium and caesium ions from the Fukushima Dai-ichi Nuclear Power Plant incident in Japan. The publication of the X-ray structure of a beta-lactamase enzyme from one such microbe, the halophile Chromohalobacter sp.
VolumeIssues 1—2JanuaryPages Soil structure and management: Lal Show more https: 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 SOCbiota, 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 biota release CO2 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.
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. Previous article in issue.Home > Indicators > Respiration Respiration.
What it is: Carbon dioxide (CO2) release from the soil surface is referred to as soil respiration. This CO2 results from several sources, including aerobic microbial decomposition of soil organic matter (SOM) to obtain energy for their growth and functioning (microbial respiration), plant root and faunal respiration, and eventually from the.
Learn how to prepare your soil for planting (and fix problematic soil) with these tips from The Old Farmer's Almanac. Learn the purpose and benefits of natural soil amendments such as compost, manure and peat moss. Biochar may be a tool for mine spoil remediation; however, its mechanisms for achieving this goal remain unclear.
In this study, Miscanthus (Miscanthus giganteus) biochar was evaluated for its ability to reclaim acidic mine spoils (pH soil microbial enzymatic activity, and initial growth of grass seedlings.
Abstract. Traces of life are nearly ubiquitous on Earth. However, a central unresolved question is whether these traces always indicate an active microbial community or whether, in extreme environments, such as hyperarid deserts, they instead reflect just dormant or dead cells.
IntroductionSoil structure is a key factor in the functioning of soil, its ability to support plant and animal life, and moderate environmental quality with particular emphasis on soil . The Atacama Desert in Chile is one of the driest places on Earth and is comparable to the dry surface of Mars.
Researchers recently discovered that when it rains in the Atacama, microbial.