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:: Volume 6, Issue 1 (9-2018) ::
2018, 6(1): 11-20 Back to browse issues page
Investigating the Effect of Soil Organic Matter on Gypsum Block Calibration for Measuring Soil Volumetric Moisture Content
Hediyeh Ahmad Pari , Seyyed Ebrahim Hashemi Garmdareh * , Mohsen Eskafi
Abstract:   (3035 Views)
Continuous soil moisture assessment and evaluation is essential for irrigation management and planning. One of the common methods for measuring the moisture content of the soil is the use of a gypsum block. The use of gypsum blocks in some cases, including the presence of organic matter in soil, may cause an error in the measurement of moisture. For this purpose, a laboratory study was conducted to provide a calibration equation for gypsum block in silty clay soil with organic matter. This study was done in three treatments including different percentages organic matter in two replications in the Laboratory of Aburaihan Campus of Tehran University. In this experiment, after putting gypsum blocks in distilled water and applying the treatments, moisture changes and the blocks’ conductivity were measured at different times. The results showed that the gypsum block reading and the measured volumetric moisture content increased with increasing organic matter content. Also, for silty clay soil containing organic matter, the polynomial equation Y = 7.08X3-0.01X2 + 0.65X-0.76 with a standard error of 3.09 and a correlation coefficient of 958.0 was obtained after fitting all the data.


 
Keywords: Gypsum block, Calibration equation, Silty clay soil, Organic matter, Polynomial equation
Full-Text [PDF 1024 kb]   (12 Downloads)    
Type of Study: Research | Subject: Special
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Ahmad Pari H, Hashemi Garmdareh S E, Eskafi M. Investigating the Effect of Soil Organic Matter on Gypsum Block Calibration for Measuring Soil Volumetric Moisture Content. Journal of Rainwater Catchment Systems 2018; 6 (1) :11-20
URL: http://jircsa.ir/article-1-277-en.html


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Volume 6, Issue 1 (9-2018) Back to browse issues page
مجله علمی سامانه های سطوح آبگیر باران Iranian Journal of Rainwater Catchment Systems
تکمیل و ارسال فرم تعارض منافع
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