Methods of soil analysis.

TL;DR: In this article, eight heavy metals were measured seasonally in the sediment of Lake Nasser during 2013 27 sites were chosen through 9 sectors across the main channel of the lake from Abu-Simbel to Aswan High Dam to assess the levels of the selected metals.

TL;DR: Foliar applied Zn-lys reduced HRI from the soil sampling area seems to be lower than <1 for Cd but may exceed due to long-term consumption of grains produced from such contaminated soil, which may help to reduce health risks associated with Cd.

TL;DR: In this article, the temporal effects of different tillage systems and residue management on distribution, storage and stratification of organic carbon and nitrogen under wheat-maize double-cropping systems in the North China Plain (NCP).

TL;DR: In this article, the authors compared two different methods for soil quality index calculation in agricultural lands of Qazvin Province, Iran, in particular, the Integrated Quality Index (IQI) and Nemoro Quality Index(NQI) models were applied using the indicator selection methods: Total Data Set (TDS) and Minimum Data Set(MDS).

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.