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Copyright of Acta Geoscientica Sinica is the property of Acta Geoscientica Sinica Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Remote Sensing is the property of Editorial Office of Journal of Remote Sensing & Science Publishing Co. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A total of 1165 samples were collected from the topsoil at a depth of 20 cm to explore the effect of soil material and topography on the variation of soil texture classification over a basin of Pengshui in Chongqing, southwest China. Classification and regression tree （CART）method was applied to class the soil texture based on parent materials and terrain indicators（elevation, slope, slope height, slope length, flow accumulation, SAGA topographical wetness index, flow path length, vector ruggedness, measure multi-resolution index of valley bottom flatness, multi-resolution index of the ridge top flatness, diffuse insolation, wind effect, wind exposition index）. The major influencing factors on soil texture class variability were investigated by the CART model. The results showed that：Parent material and topographic factors both had important effects on soil texture class variations, the factors with higher relative importance were parent material （PAR）>wind effect（WindEff）>SAGA topographic wetness index（SAGATWI）; The relative importance of terrain attributes to soil texture class variations varied with parent materials, wind effect（WindEff）and diffuse insolation（DiffuseIns）were the most essential variables for the Ordovician and the Silurian. The CART model produced a good accuracy with 86.3%（P<0.05）for the watershed. The results could provide a scientific basis for the rational planning and management of soil utilization in this area. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)