The soil particles can be gathered through physical and/or chemical processes in association with the biological activity, leading to formation of aggregates. Soil aggregates has several functions soil, increasing macroporosity and water circulation – consequently reducing erosion mechanical resistance root growth, contributing greater fixation plants absorption nutrients, protection intra-aggr...

A fluorescence-staining technique using the magnesium salt of 8-anilino-1-naphthalene sulfonic acid is described and used to follow the changes in the distribution patterns of microorganisms in soils. A statistical procedure was used to determine the occurrence of significant differences in clumping of bacteria (i.e., production of colonies) in different regions of artificial soil-aggregate sys...

The effect of different tillage systems on the size distribution of aggregates and organic carbon distribution and storage in different size aggregates in a Hydragric Anthrosol were studied in a long-term experiment in Chongqing, China. The experiment included three tillage treatments: conventional tillage with rotation of rice and winter fallow (CT-r) system, no-till and ridge culture with rot...

In the United States, petroleum extraction, refinement, and transportation present countless opportunities for spillage mishaps. A method for rapid field appraisal and mapping of petroleum hydrocarbon-contaminated soils for environmental cleanup purposes would be useful. Visible near-infrared (VisNIR, 350-2500 nm) diffuse reflectance spectroscopy (DRS) is a rapid, nondestructive, proximal-sensi...

Guan S., An N., Liu J.H., Zong N., He Y.T., Shi P.L., Zhang J.J., He N.P. (2018): Warming impacts on carbon, nitrogen and phosphorus distribution in soil water-stable aggregates. Plant Soil Environ., 64: 64–69. A five-year (2010–2015) field experiment was conducted to investigate warming impacts on organic carbon (OC), total nitrogen (TN) and total phosphorus (TP) contents and their ratios in b...

In soils under wheat cultivation, soil aggregates stability is increased and destructive effects of erosion decreased, due to organic matters (OM) application. This trail was conducted in Shavoor agriculture research station to determine of mean weight diameter (MWD) under different organic matter sources and amounts in Khuzestan province (at south west of Iran) via a split plot experiment base...

Cultivation machinery applies large amounts of mechanical energy to the soil and often brings about a decrease in soil organic carbon (SOC). New experiments on the effects of mechanical energy inputs on soil respiration are reported and the results discussed. In the laboratory, a speci®c energy, K, of 150 J kgÿ1, similar to that experienced during typical cultivation operations, was applied to ...

During decades, in semiarid rainfed Aragon, intensive soil tillage and low crop residue input have led to the loss of soil structure and soil degradation. Conservation tillage and cropping intensification can improve soil structure in these areas. The objective of this study was to determine the influence of three different tillage systems (traditional tillage, reduced tillage and no-tillage) u...