Methods of soil analysis.

TL;DR: The T-RFLP analysis of mcrA gene revealed that structure of methanogenic archaeal community was relatively stable during the anoxic incubation, and analysis at the transcript level showed a highly dynamic composition of the active methanogens.

TL;DR: Soil ammonium concentrations were very low and concentrations and cumulative amounts had no relations with wheat yield and yield increase by N applications, and nitrate N concentrations were high and correlated with seed (grain) and biomass yields of wheat without added N, and with yield rise by N addition in some layers.

TL;DR: In this article, a field factorial study was conducted to investigate the interactions between rice husk biochar and inorganic nitrogen (N) fertilizer on a sandy clay loam Alfisol.

TL;DR: In this article, the salicylic acid method was used to evaluate the nitrate content in plant tissues, which can be a good choice for measurement of nitrate in plant tissue.

TL;DR: In this paper, the authors present a modeling approach aimed at seasonal resolution of global climatic and edaphic controls on patterns of terrestrial ecosystem production and soil microbial respiration using satellite imagery (Advanced Very High Resolution Radiometer and International Satellite Cloud Climatology Project solar radiation), along with historical climate (monthly temperature and precipitation) and soil attributes (texture, C and N contents) from global (1°) data sets as model inputs.

TL;DR: In this paper, the Century ecosystem model was applied to a series of forest and grassland sites distributed globally to examine large-scale controls over soil carbon, including soil texture and foliar lignin content.

TL;DR: In this article, the Rothamsted model is used to calculate the amount of CO2 that would be released from the world stock of soil organic matter if temperatures increase as predicted, the annual return of plant debris to the soil being held constant.

TL;DR: In this paper, the formation of soil structure involves the physical forces of shrinking and swelling created by changes in water status of soils, freezing and thawing, tillage, or by movement of the larger biota in soils.