Results 41 to 50 of about 9,305 (198)

Applying multiple testing procedures to detect change in East African vegetation

open access: yes, 2014
The study of vegetation fluctuations gives valuable information toward effective land use and development. We consider this problem for the East African region based on the Normalized Difference Vegetation Index (NDVI) series from satellite remote ...
Clements, Nicolle   +3 more
core   +1 more source

Some aspects about the spatial dependence index for variability of soil attributes

open access: yesCiência Rural, 2018
: The main purpose of this article was to evaluate the behavior and relationship of the range and components of SDI (Spatial Dependence Index) in general and in function of field factors such as soil types, type of attribute and soil layers.
Eduardo Lucas Ensslin dos Santos   +5 more
doaj   +1 more source

Identification and characterization of nursery areas of red mullet Mullus barbatus in the Central Tyrrhenian Sea [PDF]

open access: yes, 2017
Red Mullet Mullus barbatus is an important target of fishing activities in the central Tyrrhenian Sea, so it is essential to identify its critical habitats in order to manage this resource efficiently.
Ardizzone, Domenico   +4 more
core   +1 more source

Spatial heterogeneity of surface roughness on tilled loess slopes in erosion stages

open access: yesSoil and Water Research, 2018
The main soil erosion areas of the Chinese Loess Plateau are tilled slopes. The knowledge of their spatial heterogeneity will contribute to the understanding of erosion mechanisms on a microtopographic scale.
Qingfeng ZHANG, Jian WANG, Faqi WU
doaj   +1 more source

Analysis and Zonation of Maximum 24-Hour Rainfall of Iran Using Wakeby Distribution and Geostatistic Technique [PDF]

open access: yesمدیریت بیابان, 2020
Investigation of spatial variability of maximum 24-hour rainfall is very important for assessment of water resources and forecasting of natural disasters.
Farzaneh Fotouhi firoozabad   +1 more
doaj   +1 more source

Variabilidade espacial de variáveis geobiofísicas nas nascentes da bacia hidrográfica do Ribeirão Santa Cruz Spatial variability of geobiophysical variables in the springs of the Ribeirão Santa Cruz watershed

open access: yesRevista Brasileira de Engenharia Agrícola e Ambiental, 2008
Objetivou-se, em Lavras, MG, caracterizar a estrutura e a magnitude de dependência espacial de variáveis ambientais nas nascentes da bacia hidrográfica do Ribeirão Santa Cruz, por métodos de interpolação geoestatística.
Marcelo de C. Alves   +6 more
doaj   +1 more source

Spatial and Temporal Stability of Weed Patches in Cereal Fields under Direct Drilling and Harrow Tillage

open access: yesAgronomy, 2020
The adoption of conservation agriculture (CA) techniques by farmers is changing the dynamics of weed communities in cereal fields and so potentially their spatial distribution.
Jordi Izquierdo   +6 more
doaj   +1 more source

Variogram analysis of stochastic processes

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2018
Properties of the semivariogram of an intrinsically stationary continuous-time random process with finite second moment are investigated. A necessary and sufficient conditions for a continuous function to be semivariogram are found.
Tatsiana V. Tsekhavaya
doaj  

A Classification for a Geostatistical Index of Spatial Dependence

open access: yesRevista Brasileira de Ciência do Solo
: In geostatistical studies, spatial dependence can generally be described by means of the semivariogram or, in complementary form, with a single index followed by its categorization to classify the degree of such dependence.
Enio Júnior Seidel   +1 more
doaj   +1 more source

Uncertainty in Upscaling In Situ Soil Moisture Observations to Multiscale Pixel Estimations with Kriging at the Field Level

open access: yesISPRS International Journal of Geo-Information, 2018
Upscaling in situ soil moisture observations (ISMO) to multiscale pixel estimations with kriging is a key step in the comprehensive usage of ISMO and remote sensing (RS) soil moisture data. Scale effects occur and introduce uncertainties during upscaling
Xiaohu Zhang   +5 more
doaj   +1 more source

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