TY  - JOUR
T1  - Pedotransfer Functions for Estimation of Soil Moisture Constants from Penetration Resistance Measurements and Some Soil Properties
AU  - Alaboz, Pelin
AU  - Işıldar, Ahmet Ali
PY  - 2021
DA  - June
Y2  - 2019
DO  - 10.15832/ankutbd.627938
JF  - Journal of Agricultural Sciences
JO  - J Agr Sci-Tarim Bili
PB  - Ankara University
WT  - DergiPark
SN  - 1300-7580
SP  - 138
EP  - 145
VL  - 27
IS  - 2
LA  - en
AB  - Studies to prediction of soil moisture constants and other soil propertiesrather than direct measurements were never dwindle importance.Models were derived from other soil properties obtained easily.Therefore, in this study focused on the predictability of some moistureconstants, whose determination was often difficult and time-consuming,from penetration resistance measurements. In the improvement ofalternative models for the estimation of moisture constants; in additionto penetration resistance, textural fractions (sand, clay and silt), bulkdensity, CaCO3 % and organic matter contents were included. Themodels were created according to soil groups with different textures(sandy, loamy, clay) for moisture constants at 0.1, 0.33, 0.5 and 15 bar.In the models for estimation of 0.1, 0.33, 0.5 and 15 bar moisturecontent, the highest differences in R2 values (0.61, 0.60, 0.64 and 0.59)between the actual and the predicted data was obtained for loamy soils.For this group, the root means square error (RMSE) ranged between1.32 and 1.90 %, and in addition, the mean error (ME) was determinedto be in a range from 1.53 to 2.05 %. For the estimation of moisturecontent at different soil moisture tensions using organic matter, bulkdensity, clay and penetration resistance properties, the coefficient ofdetermination ranged from 71 to 77 %. Therefore, it is concluded thatthe alternative models, developed using penetration resistance or by theaddition of some other soil properties, could be used safely in the loamytexture soils.
KW  - Penetration resistance
KW  - moisture constants
KW  - pedotransfer functions
KW  - Soil physics
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UR  - https://doi.org/10.15832/ankutbd.627938
L1  - https://dergipark.org.tr/en/download/article-file/821484
ER  -