scholarly journals Updating the Australian digital soil texture mapping (Part 1): re-calibration of field soil texture class centroids and description of a field soil texture conversion algorithm

Soil Research ◽  
2021 ◽  
Author(s):  
Brendan Malone ◽  
Ross Searle
Keyword(s):  
Soil Texture ◽  
Texture Mapping ◽  
Field Soil ◽  
Conversion Algorithm ◽  
Texture Class

Soil texture mapping over low relief areas using land surface feedback dynamic patterns extracted from MODIS

Geoderma ◽  
2012 ◽  
Vol 171-172 ◽  
pp. 44-52 ◽  
Author(s):  
Feng Liu ◽  
Xiaoyuan Geng ◽  
A-Xing Zhu ◽  
Walter Fraser ◽  
Arnie Waddell
Keyword(s):  
Soil Texture ◽  
Land Surface ◽  
Texture Mapping ◽  
Dynamic Patterns

Mapping Soil Texture Based on Field Soil Moisture Observations at a High Temporal Resolution in an Oasis Agricultural Area

Pedosphere ◽  
2016 ◽  
Vol 26 (5) ◽  
pp. 699-708 ◽  
Author(s):  
Renmin YANG ◽  
Feng LIU ◽  
Ganlin ZHANG ◽  
Yuguo ZHAO ◽  
Decheng LI ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Temporal Resolution ◽  
Soil Texture ◽  
Agricultural Area ◽  
High Temporal Resolution ◽  
Field Soil

Assessment of soil texture class on agricultural fields using ECa, Amber NDVI, and topographic properties

2015 ◽  
Vol 178 (3) ◽  
pp. 523-536 ◽  
Author(s):  
Michał Stępień ◽  
Stanisław Samborski ◽  
Dariusz Gozdowski ◽  
Eike Stefan Dobers ◽  
Jarosław Chormański ◽  
...  
Keyword(s):  
Soil Texture ◽  
Agricultural Fields ◽  
Texture Class

Accounting for soil structure in pedo-transfer functions: swelling vs non swelling clays

2021 ◽  
Author(s):  
Salma Tafasca ◽  
Agnès Ducharne ◽  
Christian Valentin
Keyword(s):  
Soil Texture ◽  
Land Surface ◽  
Transfer Functions ◽  
Land Surface Model ◽  
Texture Mapping ◽  
Tropical Soils ◽  
Global Scale ◽  
Pedotransfer Functions ◽  
Surface Model ◽  
Swelling Clays

<p>Tropical clay Oxisols have a strong granular structure, as opposed to other clay-textured soils, such as Vertisols. Their highly aggregated structure favors infiltration and drainage, while Vertisols favor runoff, due to their high content of swelling clays. Most global scale pedotransfer functions (PTFs) are derived from soils of temperate regions where Oxisols are absent, which does not allow to represent this type of tropical soils.</p><p>In ORCHIDEE, which is a state-of-the-art land surface model (LSM), soil hydraulic properties are derived from a soil texture map, using PTFs of temperate regions (Carsel and Parrish, 1988), which does not allow to represent tropical clay Oxisols. This has been shown to induce large negative evapotranspiration biases in areas effectively covered by clay Oxisols, and mapped as clay (Tafasca et al., 2020). In order to distinguish the two types of clays of different behavior, we introduce a new soil class to represent clay Oxisols. This is equivalent to splitting the clay soil texture in two sub-classes: clay Oxisols and swelling clay. First, we modify the Reynolds soil texture map (Reynolds et al., 2000) such as to represent clay Oxisols based on the FAO Soil Order Map of the World. Then we obtain the corresponding Van Genuchten parameters based on previous studies from the litterature. We evaluate the new PTFs and the modified soil texture map using the ORCHIDEE LSM.</p><p>Using the new soil texture mapping increases evapotranspiration by 11%, allowing to correct important negative bias in tropical areas. In these zones, the mean annual river discharge decreases, consistently with the observations.</p><p> </p>

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