Rainfall changes the physical state, pore system geometry, and structure of soils. Characterization soil provides a realistic base to understand retention movement water in soil. The objective this work was estimate multifractal parameters from Hg injection porosimetry data on uppermost surface layer as affected by simulated rainfall. Soil aggregates were sampled at 0‐ 2‐cm depth loamy soil, both recently tilled its disturbed counterpart after 260‐mm cumulative Pore size distributions (PSDs)...

In the current global change scenario, valuable tools for improving soils and increasing both agricultural productivity food security, together with effective actions to mitigate impacts of ongoing climate trends, are priority issues. Soil Organic Carbon (SOC) acts on these two topics, as C is a core element soil organic matter, an essential driver fertility, becomes problematic when disposed in atmosphere its gaseous form. Laboratory methods measure SOC expensive time-consuming. This...

Preservation and recovery of soil health have become one the priorities European environmental policies. In this context, EU Soil Protection Strategy sets concrete targets to be achieved by 2030, including improving quality in those agricultural systems that been impacted intensive practices. Aforestation land is usually considered an approach with positive effects many indicators, e.g., carbon stocks, since it consider a viable sequestration strategy stock markets. However, long-term effect...

The specific surface area (SSA) of a soil is commonly estimated by the Brunauer–Emmett–Teller (BET) equation, which implies linearity between applied pressure and volume adsorbate for restricted scale range. Dinitrogen adsorption isotherms provide useful data BET analysis, but they also contain additional information that may render multifractal analysis. objectives this work were: (i) to find out if differences in use intensity cause changes SSA assessed method, (ii) evaluate usefulness...

Pore‐size distributions (PSD) determined by different methods across various ranges of equivalent pore radius have shown multifractal characteristics. Here, the formalism was employed to describe both mercury injection porosimetry (MIP) and nitrogen adsorption isotherms (NAI) curves, measured in a Mollisol Vertisol. Four soil use intensities three replicate samples per treatment were analyzed. Mercury used measure PSDs for radii 150 0.005 μm 0.1 0.001 μm, respectively. The scaling properties...

Abstract. Understanding and describing the spatial characteristics of soil surface microrelief are required for modelling overland flow erosion. We employed multifractal approach to characterize topographical point elevation data sets acquired by high resolution laser scanning assessing effect simulated rainfall on decay. Three surfaces with different initial states or composition rather smooth were prepared microplots subjected successive events rainfall. Soil roughness was measured a 2×2...

Soil properties may exhibit large spatial variability. Frequently this variability is auto-correlated at a certain scale. In addition to soil-forming factors, soil management, land cover, and agricultural system affect the of soils. organic matter (OM) an important property contributing toward fertility key attribute in assessing quality. Increasing OM increases cation exchange capacity (CEC) enhances fertility. We analyzed impact use on CEC tropical soil, Oxisol, within São Paulo state,...

Abstract. Accurate description of soil surface topography is essential because different tillage tools produce roughness conditions, which in turn affects many processes across the boundary. Advantages fractal analysis microrelief assessment have been recognised but use indices practice remains challenging. There also little information on how decays under natural rainfall conditions. The objectives this work were to investigate decay initial induced by systems and compare performances a...

A rugosidade superficial do solo é afetada, dentre outros fatores, pelo tipo de preparo, volume chuva e estabilidade dos agregados estruturais diante da ação destrutiva água. Em um Inceptisol, num experimento erosão sob natural realizado há 15 anos, no Sul região Planalto Catarinense, Brasil, avaliou-se a superficial, qual foi expressa por meio índices: (RR), tortuosidade (T) diferença elevação limite (LD), cultivo milho, em 2003, aveia, 2004, cujos períodos experimentais precipitaram 229...

Abstract. Changes in soil surface microrelief with cumulative rainfall under different tillage systems and crop cover conditions were investigated southern Brazil. Surface was none (fallow) or the succession maize followed by oats. Tillage treatments were: 1) conventional on bare (BS), 2) (CT), 3) minimum (MT) 4) no (NT) Measurements taken a manual relief meter small rectangular grids of 0.234 0.156 m2, throughout growing season oats, respectively. Each data set consisted 200 point height...

Nutrient maps based on intensive soil sampling are useful to develop site-specific management practices. Geostatistical methods have been widely used determine the spatial correlation and range of dependence at different scales. If is detected, modelled semivariograms can then be map interested variable by kriging, an interpolation method that produces unbiased estimates with minimal estimation variance. The objectives this paper were examine distribution micronutrients Cu, Zn, Fe Mn...

A direção de semeadura influencia a rugosidade da superfície do solo, e, associada à chuva e outras variáveis, como cobertura solo pela copa das plantas, provoca erosão hídrica solo. Utilizando um simulador chuvas braços rotativos, foram feitos, em campo, cinco testes simulada sobre as culturas aveia (Avena strigosa) ervilhaca (Vicia sativa), com intensidade constante 64 mm h-1, entre agosto novembro 2006, para avaliar perdas água nos seguintes tratamentos, duas repetições: mecanizada linhas...

Abstract. Most of the indices currently employed for assessing soil surface micro-topography, such as random roughness (RR), are merely descriptors its vertical component. Recently, multifractal analysis provided a new insight describing spatial configuration roughness. The main objective this study was to test ability parameters assess in field conditions decay initial induced by natural rainfall under different tillage systems. In addition, we evaluated potential joint use plus RR improve...

Abstract. Soil penetration resistance (PR) is widely used as an indirect indicator of soil strength. PR linked to basic properties and correlated root growth plant production, such it extensively a practical tool for assessing compaction evaluate the effects management. This study investigates how results from multifractal analysis can quantify key elements depth-dependent profiles this information be at field scale. We analysed multifractality 50 vertical profiles, measured 0 60 cm depth...