Spatial Variability of Soil Chemical Properties in a Jujube Slope on the Loess Plateau of China

Soil Science ◽  
2011 ◽  
Vol 176 (10) ◽  
pp. 550-558 ◽  
Author(s):  
Yiru Bai ◽  
Youke Wang
Keyword(s):  
Spatial Variability ◽  
Loess Plateau ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
The Loess Plateau

Soil chemical properties and microbial biomass after 16 years of no-tillage farming on the Loess Plateau, China

Geoderma ◽  
2008 ◽  
Vol 144 (3-4) ◽  
pp. 502-508 ◽  
Author(s):  
Qingjie Wang ◽  
Yuhua Bai ◽  
Huanwen Gao ◽  
Jin He ◽  
Hao Chen ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Loess Plateau ◽  
Chemical Properties ◽  
Soil Chemical Properties ◽  
No Tillage ◽  
The Loess Plateau

scholarly journals Spatial variability of soil chemical properties after coffee tree removal

2009 ◽  
Vol 33 (5) ◽  
pp. 1507-1514 ◽  
Author(s):  
Sidney Rosa Vieira ◽  
Osvaldo Guedes Filho ◽  
Márcio Koiti Chiba ◽  
Heitor Cantarella
Keyword(s):  
Spatial Variability ◽  
Spatial Dependence ◽  
Crop Yields ◽  
Management Strategies ◽  
Chemical Properties ◽  
Spherical Model ◽  
Soil Chemical Properties ◽  
Kriging Interpolation ◽  
Geostatistical Methods ◽  
Plant Removal

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. This study was carried out at the Centro Experimental of the Instituto Agronomico, in Campinas, São Paulo, Brazil. The aim was to characterize the spatial variability of chemical properties of a Rhodic Hapludox on a recently bulldozer-cleaned area after over 30 years of coffee cultivation. Soil samples were collected in a 20 x 20 m grid with 36 sampling points across a 1 ha area in the layers 0.0-0.2 and 0.2-0.4 m to measure the following chemical properties: pH, organic matter, K+, P, Ca2+, Mg2+, potential acidity, NH4-N, and NO3-N. Descriptive statistics were applied to assess the central tendency and dispersion moments. Geostatistical methods were applied to evaluate and to model the spatial variability of variables by calculating semivariograms and kriging interpolation. Spatial dependence patterns defined by spherical model adjusted semivariograms were made for all cited soil properties. Moderate to strong degrees of spatial dependence were found between 31 and 60 m. It was still possible to map soil spatial variability properties in the layers 0-20 cm and 20-40 cm after plant removal with bulldozers.

Short-range and regional spatial variability of soil chemical properties in an agro-ecosystem in eastern Croatia

CATENA ◽  
2017 ◽  
Vol 154 ◽  
pp. 50-62 ◽  
Author(s):  
Igor Bogunovic ◽  
Sebastiano Trevisani ◽  
Miranda Seput ◽  
Darko Juzbasic ◽  
Boris Durdevic
Keyword(s):  
Spatial Variability ◽  
Short Range ◽  
Chemical Properties ◽  
Soil Chemical Properties

scholarly journals Spatial variability of soil nutrients and its affecting factors at small watershed in gully region of the Loess Plateau

2020 ◽  
Vol 35 (3) ◽  
pp. 743
Author(s):  
YANG Jing-han ◽  
LIU Meng-yun ◽  
ZHANG Jie ◽  
ZHANG Meng-meng ◽  
CAO Run-shan ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Soil Nutrients ◽  
Loess Plateau ◽  
Affecting Factors ◽  
Small Watershed ◽  
The Loess Plateau

scholarly journals Spatial variability of soil hydraulic properties on a steep slope in the loess plateau of China

2008 ◽  
Vol 65 (3) ◽  
pp. 268-276 ◽  
Author(s):  
Wei Hu ◽  
Ming An Shao ◽  
Quan Jiu Wang ◽  
Jun Fan ◽  
Klaus Reichardt
Keyword(s):  
Spatial Structure ◽  
Spatial Variability ◽  
Loess Plateau ◽  
Spatial Dependence ◽  
Hydraulic Properties ◽  
Applied Pressure ◽  
Soil Surface ◽  
Pressure Head ◽  
Steep Slope ◽  
The Loess Plateau

The understanding of the structure of the spatial variability of soil surface hydraulic properties on steep slopes is important for modeling infiltration and runoff processes. The objective of this study was to investigate the spatial variability of these properties on a steep slope of the Loess Plateau in northwest China. A 9600 m² area was systematically sampled in a grid of 106 points spaced 10 m x 10 m. Hydraulic properties were determined with a disc infiltrometer under multiple pressure heads (-15, -9, -6, -3, 0 cm) at each sample point. Classical and geo-statistical methods were used for data analysis. The results indicated that the variation of Gardner's a and hydraulic conductivities at all applied pressure heads was moderate and the heterogeneity for hydraulic conductivities increased as the applied pressure head increased. Along the slope, hydraulic conductivities generally decreased downwards, while the Gardner's a fluctuated slightly. The Gardner's a of the shaded aspect of the slope was greater than that of the sunny aspect. The hydraulic conductivities of the shaded aspect were greater at higher pressure heads as compared to the sunny aspect, but lower than those of the sunny aspect at lower pressure heads. Correlation analysis showed a negative correlation between hydraulic conductivity and soil organic matter and clay (<0.01 mm) contents. Hydraulic conductivities at pressure heads of -3, -6, -9, -15 cm varied across the slope and their spatial dependence increased as the pressure head declined. The heterogeneity and spatial dependence of hydraulic properties were larger for the areas with shaded aspect as compared to the sunny aspect, however, as pressure decreased they showed a progressively increasing spatial structure, and their spatial structure behaved increasingly similar in both the shaded and sunny aspects.

Factors Affecting Soil Desiccation Spatial Variability in the Loess Plateau of China

2019 ◽  
Vol 83 (2) ◽  
pp. 266-275 ◽  
Author(s):  
Chunlei Zhao ◽  
Ming'an Shao ◽  
Xiaoxu Jia ◽  
Yuanjun Zhu
Keyword(s):  
Spatial Variability ◽  
Loess Plateau ◽  
The Loess Plateau ◽  
Factors Affecting ◽  
Soil Desiccation
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