Soil moisture retrieval improvement over agricultural fields by adding entropy–alpha dual-polarimetric decomposition features

2021 ◽  
Vol 15 (03) ◽  
Author(s):  
Zeinab Akhavan ◽  
Mahdi Hasanlou ◽  
Mehdi Hosseini ◽  
Inbal Becker-Reshef
Keyword(s):  
Soil Moisture ◽  
Agricultural Fields

scholarly journals Soil moisture retrieval over agricultural fields from L-band multi-incidence and multitemporal PolSAR observations using polarimetric decomposition techniques

2021 ◽  
Vol 261 ◽  
pp. 112485
Author(s):  
Hongtao Shi ◽  
Lingli Zhao ◽  
Jie Yang ◽  
Juan M. Lopez-Sanchez ◽  
Jinqi Zhao ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Agricultural Fields ◽  
Decomposition Techniques ◽  
L Band

scholarly journals Potential of a two-component polarimetric decomposition at C-band for soil moisture retrieval over agricultural fields

2018 ◽  
Vol 217 ◽  
pp. 38-51 ◽  
Author(s):  
Hongquan Wang ◽  
Ramata Magagi ◽  
Kalifa Goïta
Keyword(s):  
Soil Moisture ◽  
Agricultural Fields ◽  
Two Component

Quasi-3D mapping of soil moisture in agricultural fields using electrical conductivity sensing

2022 ◽  
Vol 259 ◽  
pp. 107246
Author(s):  
Hira Shaukat ◽  
Ken C. Flower ◽  
Matthias Leopold
Keyword(s):  
Electrical Conductivity ◽  
Soil Moisture ◽  
Agricultural Fields ◽  
3D Mapping

Local, landscape and continental scale factors controlling earthworm community structure

2020 ◽  
Author(s):  
Ashley Cameron ◽  
Robert Bradley ◽  
Petra Benetkova ◽  
Agnieszka Józefowska ◽  
Gabriel Boilard ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Moisture ◽  
Community Structure ◽  
Central Europe ◽  
Plant Litter ◽  
Agricultural Fields ◽  
Eastern Canada ◽  
Earthworm Species ◽  
Continental Scale ◽  
Scale Factors

<p>Past studies have praised earthworms for improving soil structure and fertility, but criticized earthworms for increasing the leaching of nutrients and soil greenhouse gas emissions. Therefore, in order to maximize the environmental benefits and reduce the environmental costs of earthworms, it is important to determine the factors controlling the structure of earthworm communities at local, landscape and continental scales. We first hypothesized that forested riparian buffer strips (FRBS) within agricultural landscapes would be a refuge for earthworms, due to higher soil moisture and organic matter compared to adjacent agricultural fields (“treatment” = FRBS vs. Field).  Within sites, we hypothesized that earthworms would be most abundant where the chemical quality of above- and belowground plant litter is high, or where soil disturbance is low. At the continental scale, we hypothesized that total summer precipitation interacts with regional and local scale factors in controlling earthworm community structure.  A field survey was conducted to quantify earthworm species abundances in FRBS and adjacent agricultural fields across Eastern Canada and Central Europe (two “bioregions” differing in rainfall). At each of 77 sites, we collected and identified earthworms from three plots within FRBS and adjacent agricultural fields, and noted the tree species, understory vegetation, drainage class, agricultural crop as well as five soil physicochemical variables (texture, pH, total C, total N and % organic matter). In each bioregion and treatment, we found proportionately more endogeic than anecic or epigeic earthworm species. In Eastern Canada there were proportionately fewer anecic and more epigeic individuals in FRBS than in fields, whereas in Central Europe there were fewer endogeic and more anecic earthworms in FRBS than in fields. We also found significant interactions between bioregion and treatment on total earthworm abundance and biomass, and on soil moisture. More specifically, in Eastern Canada we found higher earthworm abundance and biomass, soil moisture and organic matter in FRBS. Conversely, in Central Europe we found higher earthworm abundance and biomass in fields, no treatment effects on soil moisture, and higher soil organic matter in FRBS. The different earthworm distribution patterns in each bioregion were not related to the types of agricultural crops, but rather to differences in precipitation and soil moisture across bioregions. Within FRBS in Eastern Canada, earthworm abundance in deciduous and mixedwood stands were higher than in coniferous stands; in Central Europe, earthworm abundance was higher in deciduous stands only. Within FRBS in Eastern Canada, the abundance of the prominent endogeic species <em>Apporectodia rosea</em> was correlated with herbaceous plants, notably ferns and graminoids. Conditional regression tree analysis revealed positive relationships between earthworms and soil clay content, pH, moisture and organic matter. Our results suggest that local and landscape patterns in earthworm diversity can be predicted by soil and vegetation attributes, but the relative importance of these factors change across continual scales due to climate.  Comparing the distributions of earthworms across different scales provides insights into the potential of different species to spread into new habitats with climate change.</p>

Soil Moisture Retrieval in Agricultural Fields Using Adaptive Model-Based Polarimetric Decomposition of SAR Data

2016 ◽  
Vol 54 (8) ◽  
pp. 4445-4460 ◽  
Author(s):  
Lian He ◽  
Rocco Panciera ◽  
Mihai A. Tanase ◽  
Jeffrey P. Walker ◽  
Qiming Qin
Keyword(s):  
Soil Moisture ◽  
Agricultural Fields ◽  
Adaptive Model ◽  
Model Based ◽  
Sar Data

Passive microwave response to vegetation and soil moisture on agricultural fields

2014 ◽  
Author(s):  
B. Miller ◽  
P. R. Bullock
Keyword(s):  
Soil Moisture ◽  
Passive Microwave ◽  
Agricultural Fields ◽  
Microwave Response
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