Seventy years of different management treatments have produced significant differences in runoff, erosion, and ponded infiltration rate in a winter wheat (Triticum aestivum L.)–summer fallow experiment in OR, USA. We tested the hypothesis that differences in infiltration are due to changes in soil structure related to treatment-induced biological changes. All plots received the same tillage (pl...

In China, increasing the quantity and quality of total carbon nitrogen stocks in sandy soil used for crop production is an important research issue. Soil amendment with pelletized straw could improve both physical structure fertility soils, but these aspects remain understudied. The present pot field experiments examined dynamic changes water holding capacity, bulk density, stocks, distribution...

Surface vegetation has a substantial impact on soil aggregate stability, which is an important indicator of quality. However, there still limited research the response stability indicators and organic carbon, total nitrogen, phosphorus content in aggregates for different patterns rocky desertification fragile ecological areas. Therefore, order to study effects restoration models related nutrien...

In this study, we report on the distribution and mineralogy of micron-sized mineral aggregates formed in the top horizon of an acid sulfate soil. The distribution and oxidation state of arsenic (As) and selenium (Se) were also determined. The soil used in this study was formed from pyritic shale parent materials on the east side of the California Coast Range. Synchrotron-based X-ray fluorescenc...

A long-term fertilization experiment was conducted to examine the effects of different fertilization practices on nematode community composition within aggregates in a wheat-maize rotation system. The study was a randomized complete block design with three replicates. The experiment involved the following four treatments: no fertilizer, inorganic N, P and K fertilizer (NPK), NPK plus manure (NP...

Fractal geometry has become a widely accepted descriptive tool for speci"c physical properties of natural soils and fractal scaling has recently been proposed as a model for soil particle size distribution. In this work, the cumulative mass distribution of dry soil aggregates, M(r(R), was estimated and shown to be proportional to R3D, where r is the aggregate size, R is a speci"c measuring scal...

The structures of every kind rest on the soil under laying them. The stability of these structures depends upon the load carrying capacity of the soil. The bearing capacity of soil also depends upon the quantum of coarser particles presents in it. The plate load test is used for the design of footing. Therefore, in the present investigation, the plate load tests were conducted to study the sand...