Results 51 to 60 of about 1,675 (179)

Spatial variability of physical attributes of an alfisol under different hillslope curvatures Variabilidade espacial de atributos físicos de um argissolo sob diferentes curvaturas do relevo

Revista Brasileira de Ciência do Solo, 2010
The influence of relief forms has been studied by several authors and explains the variability in the soil attributes of a landscape. Soil physical attributes depend on relief forms, and their assessment is important in mechanized agricultural systems ...
Livia Arantes Camargo, José Marques Júnior, Gener Tadeu Pereira   +2 more
doaj   +1 more source

Spatial Variation of Acidic Sodic Soils in High‐Andean Environments and Theoretical Estimation of Gypsum Requirement

Soil Use and Management, Volume 42, Issue 3, July‐September 2026.
ABSTRACT High‐Andean forage systems are characterized by extensive management of cultivated forages, primarily through rotation of forage oats (Avena sativa) and alfalfa (Medicago sativa), under marginal edaphoclimatic conditions. Within this context, soil sodicity severely constrains the productivity of these systems in the districts of Ayaviri and ...
Kenyi Quispe, Nilton Hermoza, Sharon Mejia, Elvis Ccosi, Dalmecio Miranda, Luz Choquechambi, Katherin Choquehuanca, Edgar Carrasco, Néstor Cuellar‐Condori   +8 more
wiley   +1 more source

Spatial variability of soil chemical properties after coffee tree removal Variabilidade espacial dos atributos químicos do solo após remoção de cafezal

Revista Brasileira de Ciência do Solo, 2009
Assessing the spatial variability of soil chemical properties has become an important aspect of soil management strategies with a view to higher crop yields with minimal environmental degradation.
Sidney Rosa Vieira, Osvaldo Guedes Filho, Márcio Koiti Chiba, Heitor Cantarella   +3 more
doaj   +1 more source

Riverscape heterogeneity shapes population diversity for a migratory fish

Ecological Applications, Volume 36, Issue 4, June 2026.
Abstract Habitat patch dynamics can scale up to influence population demography and diversity with implications for resilience to environmental stochasticity. But how the spatial arrangement and size of habitat patches interact with other components of habitat heterogeneity to shape population diversity at larger spatial scales is not well understood ...
Jeffrey R. Baldock, William C. Rosenthal, Robert K. Al‐Chokhachy, Matthew R. Campbell, Catherine E. Wagner, Annika Walters   +5 more
wiley   +1 more source

Measuring Spatial Dependence with Semivariograms

Bulletin (Kansas Geological Survey), 1977
The semivariogram is a measure of statistical dependence and is closely related to the autocorrelogram. It is particularly suitable for analysis of spatial functions that describe natural phenomena characterized by a geographic distribution and variations which arc in part continuous and in part stochastic.
openaire   +1 more source

Fine‐Scale Spatial Variation of Evapotranspiration Across Tropical Land‐Cover Mosaics Revealed by UAV Thermography

Hydrological Processes, Volume 40, Issue 6, June 2026.
We study evapotranspiration (ET), a key flux in the hydrological cycle, across heterogeneous tropical land‐cover mosaics in lowland Sumatra featuring secondary forest patches, oil palm plantations, and shrubland. We apply high‐resolution UAV thermography and an energy‐balance model to derive ET across three mosaic landscapes (Areas 1–3).
Medha Bulusu, Florian J. Ellsäßer, Hendrayanto, Dirk Hölscher, Alexander Röll   +4 more
wiley   +1 more source

Temperate lake heatwaves accelerate nonlinearly as timing synchronizes across a diverse landscape

Limnology and Oceanography, Volume 71, Issue 6, June 2026.
Abstract Temperate lakes are experiencing intensifying heatwaves, or prolonged periods of anomalously warm water, with potentially severe ecological consequences. Previous studies have predominantly used linear trend analyses to understand heatwave dynamics, potentially masking temporal acceleration patterns and shifts in variance.
Christopher J. Sullivan, L. Zoe Almeida
wiley   +1 more source

Variabilidade espacial da agregação do solo avaliada pela geometria fractal e geoestatística Spatial variability of soil aggregation evaluated by fractal geometry and geostatistics

Revista Brasileira de Ciência do Solo, 2004
Este trabalho teve por objetivo explorar a aplicabilidade da teoria de fractais no estudo da variabilidade espacial em agregação de solo. A geometria de fractais tem sido proposta como um modelo para a distribuição de tamanho de partículas.
J. R. P. Carvalho, S. C. F. Dechen, G. Dufranc   +2 more
doaj   +1 more source

Application of Weighted Semivariogram Model (WSVM) based on fitness to experimental semivariogram on estimation of rainfall amount

, 2011
Abstract. This study presents a weighted semivariogram model (WSVM) which is intended to reduce the uncertainties in the selection of the best-fit semivariogram model and associated parameters. The proposed WSVM is based on the combined forecast method, providing the weighted average semivariogram by summing up the product of estimated semivariograms ...
Wu, S.-J., Chen, P.-H., Yang, J.-C.
openaire   +2 more sources

Subsoil Carbon and δ13C Spatial Patterns Reveal Land Use Legacy in a Sandy Subtropical Ecotone in Brazil

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 6, June 2026.
Abstract Soil organic carbon (SOC) storage represents one of the most critical ecosystem services provided by soils, yet scientific assessments frequently focus on surface layers, overlooking deeper horizons. In this study, we investigated SOC stocks and spatial patterns of soil δ13C across three contrasting land use and land cover (LULC) types in ...
Lucas F. Alexandre, Rodnei Rizzo, Jonas Steinfeld, Andres M. R. Gomez, Victor N. Libório, Plínio B. Camargo, Siu M. Tsai, Maria V. R. Ballester   +7 more
wiley   +1 more source