No. 30,p./+F/0 G,**.H - js-soilphysics.com · ˘ˇ˘ˆ˙˝ ˛˚ ˜ ! " # $% &’ ’ *+ , - . / 0...

6
./ 腏腙腕腜腞腐腎腄腍腊腅腃腋 腊腆腈腀腇腉腄腌腍腚腛 腙腕腜腞腒腑腂腓腗腖腚腛腝腔 : ,**- +/++ ,, : 膗臚膤臋臦臥TDR 腊腸膂腅腇膎膆腲腹膍膒腌腎腏 膆腲膏腬腫膃腍膈膁腌腈腄腉 膗臚膤膒臢膜膤臅膵膜 膋膏 膗臚膤膩膷臏膤臼臒臕腧膂臈膞腟膎膺腤腐腍腠 TDR 腡臲腘腜膀腞腵膉 +膡腥臱臔膠腤腟腍腠臄膀腞臁至腵膉膚腑腫腝腄腂腞腳腵腞腝腄腤膺腗腮腜腂腞*.*/ *.+ cm - cm - 膀腞臁至腵膉腧臱臔 腙腭腥腤腳腵腞腡腦臍腗 -*.* cm 腝腄腧 膀腞臁至腵膉*.+ cm - cm - 腑腫 *.-/*.. cm - cm - 腧膴臀腤膚腘臠膫腢膶腤臔腤膙腧臱臔腘腠腍 腔膽臎腯臡腘腜膡膠腉腜臁膠腪腬腳腵腞. 腑腫 / 臂臜腩腤腑腕腠臰腗 1* 3* cm 臙腙腭腖腢腒腮膁腘腜腖腀腨腀腞 : TDR, 膀腞臁至腵膉臁膠膡膠腠腡腟腘腤腒腢腰腻膀腍 膅腷腹膍膇腽腌腭腆腏腳腮 膯臤膤膒膤臅膵膜 膯臤膏臗臊腃腠膓膐 膟膦臝 膀膁腽腸膇腲膃膻臹腤腐腕腭臯至腵腹 膍腯膃腚腢腘腠臇腯臔腞腜腘腜至腹膌腷腂腥臨膊腒臻膮至致腯膂膈膅腂 腺腢腘腠臩腩腠膬膼腕腫腮腭腖腢腒臡腗腮腜臯至 腵腕腹腤腢膱臬腻腂腺腥膬致腦膰腒膰腡腌腞腜腖腢腤膳膑腘腠腍腭腢臓腏腫腮 腖腀腨腀腞 : 膀膁腽腸膇腲膃膻臹臮臶臟膹臯至腹膌腷腂 Assessing TDR Method for Simultaneous Monitoring of Water and Solute in Dune Soil 膤膥腅腓臅膵腹膌腺腂 Hossein DEHGHANISANIJ腽腋腷膏臭臌臐 Time domain reflectometry (TDR) is rapidly be- coming a popular method for measuring water con- tent and solute concentration in the laboratory as well as in the field. Success or failure of TDR to measure solute resident concentration depends on the accuracy of the calibration used. In this study, the accuracy of TDR method for monitoring water and solute simultaneously, in dune soil was tested. Test results showed that the TDR method has high accuracy for monitoring soil water content, but it has less accurate for monitoring soil electrical conductiv- ity across a water content range of about *.*- cm - / cm - . 腖腀腨腀腞 : TDR, soil water content, soil solution, dune soil, calibration. 腕腔腥腟腑腝腓腐腧腗腦腍膉膌腴腼腋 腾腺膑腪腶腯膄腍腭腱 膯臤膤膒膤臅膵膜 腀腦膯臤膏臗臊 ,*/*腥臉腆膇腥腵腴膉腽腱腼臃膔腯-*/*+30腢腍腎 - 膢腥臁膘臁腘臁膥腗腚腜腵腴膉腽腱腼腳腰膋腶膊腤腟腍腠膎臧膸臞臆腯 臔腞腜腳腰膋腶膊腥腧腳腯臸膣膾膁腾腵膄臑腢膛膎臧膸腥膬膼腤腟腍腠腘膉腚腣臄 腯臞腨腜腛腥臁膝腆膇 -*/*腤腐腍腠-*/*臁腗腚腜臞腤腟腍腠腦膣膾膁腾腵 膄膆腻膊腤腛膅腙腭腖腢腒腫腑腢腣腞腜J. Jpn. Soc. Soil Phys. 臯腥腴膆No. 30, p. /+/0 ,**.腣腙腛腀腚腜腘腤腩 膊膋 膊膋膐腵

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Assessing TDR Method for Simultaneous

Monitoring of Water and Solute in Dune Soil

A���B/��vw�yHossein DEHGHANISANIJ�CD��]���

Time domain reflectometry (TDR) is rapidly be-

coming a popular method for measuring water con-

tent and solute concentration in the laboratory as

well as in the field. Success or failure of TDR to

measure solute resident concentration depends on

the accuracy of the calibration used. In this study,

the accuracy of TDR method for monitoring water

and solute simultaneously, in dune soil was tested.

Test results showed that the TDR method has high

accuracy for monitoring soil water content, but it has

less accurate for monitoring soil electrical conductiv-

ity across a water content range of about�*.*- cm-/

cm-.

����� : TDR, soil water content, soil solution,

dune soil, calibration.

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J. Jpn. Soc. Soil Phys.

�p-O}No. 30, p. /+F/0 G,**.H

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Soil-Water and Compaction Properties of

Soils as Influenced by Incorporation

of Wood Bark

��1j1jk[�0j��l

Burhanuddin RASYID

��1j0j\ 8����8���Wood bark as a side-product of agriculture can be

used as organic amendment in nutrients recycle and

soil improvement. The e#ect of wood bark incorpo-

ration to three-phase composition of soils, soil resist-

ance, hydraulic conductivity, and water retention

was investigated on clay and sandy soil. This study

indicated that in soils tested, both samples have

di#erent tendencies when wood bark is incorporated

to these soils. The di#erence is recognized related

to the basic of physical properties.

����� : Wood bark, three-phase composition,

soil resistance, hydraulic conductivity.

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Time Domain Reflectometry Coil Probe for

Measuring Soil Water Characteristic Curve

of Water Repellent Volcanic Ash Soils

ª«"JtJ$ B. AUNG��� ¬Despite being reported about water repellent soils

in many countries, mostly past researches based on

sandy soils. This study gives an account for various

soil water repellency classes of volcanic ash

aggregated soils. We used Time Domain Re-

flectometry (TDR) measurement of soil water con-

tent. Two sets of calibration for TDR --rods probes

and coil probes were provided. The physics of the

phenomena of main drying process and three wett-

ing processes were studied with soil water character-

istic curve. Finally, the e#ect of hysteresis and the

volumetric content of entrapped air can be deter-

mined by soil water characteristic curve.

����� : Volcanic ash soil, Soil water repellency,

TDR coil probe, Soil water characteristic

curve.

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