Soil Moisture Research of Revegetation Area on Slop of Yingrui Highway in the Spring

2011 ◽  
Vol 356-360 ◽  
pp. 2440-2444
Author(s):  
Chun Ying Long
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Dynamic Monitoring ◽  
Moisture Determination ◽  
Drying Method ◽  
Deep Soil ◽  
Oven Drying ◽  
Rocky Slope ◽  
Reconstruction Mode

The research object is slop near Yingrui highway, we mainly used oven drying method, combined with TDR, carrying out different vegetation types in interchange area and different substrates types in slope area about dynamic monitoring soil moisture in the spring. According to the result, The daily dynamic of the 2 types of slop soil moisture content has no obvious regular pattern, but each time the moisture content in soil slope are higher than rocky slope. We can get the conclusion after variance analysis, the main factors which influencing the discretion of the soil moisture content in slope and interchange area are the slope matrix type and the different vegetation reconstruction mode in interchange area. Meanwhile, according to the data, which we applied to the same experiment with both TDR and oven drying method, and after comparative analysis, we think, it’s completely effective to make TDR applied in deep soil moisture determination in some places such as interchange area, but the data about shallow soil moisture determination which got from the places such as in side slope is inaccurate. We should be more cautious when using it.

Soil Moisture Dynamic Discussed of the Exchanging Vegetation Reconstruction of Ying Rui Highway in the Spring

2011 ◽  
Vol 90-93 ◽  
pp. 3245-3249
Author(s):  
Chun Ying Long ◽  
Hui Zhang
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Layer Thickness ◽  
Soil Moisture Content ◽  
General Trend ◽  
Soil Layer ◽  
Dynamic Monitoring ◽  
Vegetation Types ◽  
Drying Method ◽  
Reconstruction Model

With interchanging vegetational reconstruction of Ying Rui highway as the research object, using Drying method as principal combining with TDR method,carry out communication areas of different vegetation types and different matrix types of slope area of dynamic monitoring soil moisture in the spring, the results show:Soil moisture content in spring declined as time goes on from March 8, to April 7 day. Dynamic general trend of soil moisture declined from 6：00 am to 6 :00pm,the soil moisture content overall drop which slightly fluctuates after afternoon, but has no obvious peak, and increases again after evening .The soil moisture content of two kinds of reconstruction models varies with different soil layer thickness:0-20 cm soil shows trees reconstructing model >shrubs reconstruction model ;20 to 40 cm soil shows bush rebuild model> trees reconstruction model.

Evaluation of Various Soil Moisture Sensors in Four Different Soil Types

2018 ◽  
Vol 34 (6) ◽  
pp. 963-971 ◽  
Author(s):  
Tonny José Araújo da Silva ◽  
Edna Maria Bonfim-Silva ◽  
Adriano Bicioni Pacheco ◽  
Thiago Franco Duarte ◽  
Helon Hébano de Freitas Sousa ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Soil Samples ◽  
Soil Types ◽  
Coefficient Of Determination ◽  
Regression Analyses ◽  
Drying Method ◽  
Soil Moisture Sensors ◽  
Calibration Equations

Abstract.Accurate measurements of soil moisture content can contribute to resource conservation in irrigated systems. The objective of this study was to evaluate various soil moisture sensors (a porous cup tensiometer, Diviner 2000, PR2, XH300, PM100, and ML3; the mention of model names does not constitute an implied endorsement) used in four different soil types. The experiment was conducted inside a greenhouse using a specially constructed box that contained the soil samples. The soil samples were first saturated and subsequently drained before starting the measurements. The soil moisture content was determined by the oven-drying method. Using the standard deviation of the sensor readings, regression analyses were performed, resulting in calibration equations and coefficient of determination (R2) values for each sensor and soil type combination. The porous cup tensiometer, Diviner 2000, PR2, and ML3 measurements resulted in excellent R2 values that exceeded 0.95 for the four soils. However, measurements with the XH300 and PM100 sensors resulted in R2 values of 0.37 to 0.86 and 0.61 to 0.94, respectively, limiting their scientific applicability for the studied soils. Therefore, the porous cup tensiometer, Diviner 2000, PR2, and ML3 estimated the soil moisture content with greater confidence than did the other sensors and with an error of less than 5%. Keywords: Calibration, Tensiometer, Volumetric water content.

scholarly journals Sifat Fisik, Kimia dan FTIR Spektrofotometri Gambut Hidrofobik Kalimantan Tengah

2013 ◽  
Vol 14 (2) ◽  
pp. 159-166
Author(s):  
Sri Nuryani Hidayah Utami ◽  
Azwar Maas ◽  
Bostang Radjagukguk ◽  
Benito Heru Purwanto
Keyword(s):  
Soil Moisture ◽  
Chemical Analysis ◽  
Moisture Content ◽  
Physical Properties ◽  
Soil Moisture Content ◽  
Ftir Spectra ◽  
Water Repellent ◽  
Total Acidity ◽  
Peat Soils ◽  
Oven Drying

Peat soils naturally have hydrophilic or waterloving character with highly capable of exchanging the cations and cycling the nutrients from the vegetations. This water-loving character is altered to water-repellent character in hydrophobic peat soils. This research was aimed toobserve deeply the functional bunch carrier of hydrophobic and hydrophilic peat soils as shown by FTIR spectra in relation with inherent chemical and physical properties of the soils. Five peat soils consisted of two native andartificial hydrophobic peat soils and one sample of hydrophilic peat soils were studied. Artificial hydrophobic peat soils were yielded by oven-drying the native hydrophobic peat soils at 50 oC for 10 hours. FTIR spectra can distinguish the functional bunch carrier of hydrophobic and hydrophilic peat soils. FTIR spectra of hydrophobic peat soils showed degradation of hydrophilic bunch carrier (OH and COOH) and increase of the hydrophobic bunch carrier (tying aromatic from esther and ether). Chemical analysis of the hydrophobic peat soils also indicated the decrease of OH and COOH content, decrease of CEC , soil total acidity and soil moisture content.

scholarly journals Design and Construction of a Soil Moisture Measuring

2020 ◽  
pp. 29-34
Author(s):  
A. A. Ijah ◽  
O. W. Bolaji ◽  
O. O. Adedire ◽  
J. Z. Emmanuel ◽  
N. E. Onwuegbunam ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Regression Coefficient ◽  
Gravimetric Method ◽  
Voltage Regulator ◽  
Moisture Determination ◽  
Moisture Contents ◽  
Design And Construction

A digital soil moisture reader was constructed and tested. It uses a lipo battery of 9v which was regulated to a constant 5v with the help of a voltage regulator 7805. The digital soil moisture reader developed was tested and the result obtained was compared with that obtained using the gravimetric method of determining soil moisture contents. In determining the soil moisture content, a certain quantity of soil was collected and a particular volume of water was added incrementally. The result shows that the soil moisture reader is accurate. The evaluation was carried out using the gravimetric method of soil moisture determination as a basis of comparison. Nine samples of 50g of soli were collected from Federal College of Forestry Mechanization Farm and a certain amount of water was added incrementally during the process of determining the soil moisture content. The soil reader was calibrated using the gravimetric method which shows a regression coefficient R^2 of 0.986 which indicates that the soil reader is accurate, sensitive and reliable.

scholarly journals DETERMINATION OF MOISTURE CONTENT IN SOIL BASED ON OVEN DRYING METHOD USING A MICROSTRIP PATCH SENSOR

2020 ◽  
Vol 5 (2) ◽  
pp. 233-239
Author(s):  
Sweety Jain ◽  
Pankaj Kumar Mishra ◽  
Vandana Vikas Thakare
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Return Loss ◽  
Low Cost ◽  
Network Analyzer ◽  
Agricultural Field ◽  
Drying Method ◽  
Oven Drying ◽  
Moisture Sensor

The proposed design is analyzed of a pentagon shape of microstrip sensor for determination the soil moisture measurement. The proposed design is useful in agricultural field as well as measured the moisture with accuracy and it is designed on FR4 substrate with 1.676 thicknesses. Many methods are used for detecting the moisture but oven drying method is very cheap and easy to install. A new 2.3 GHz soil moisture sensor using microstrip transmission line is presented with good return loss -28dB and gain 3.2dB. The main advantages of the proposed sensor will be its high accuracy, quickness of measurement, low cost and ease of implementation. Since the sensor has low power consumption. Motivation/Background: The microstrip moisture sensor is helpful for detecting the moisture content of soil. The proposed patch sensor design is being beneficial in real time agricultural field for the determination of soil moisture content (MC). The actual moisture content in soil is determined using conventional, standard an oven drying method at operating frequency 2.3GHz with compact and low cost. The work has done at frequency range between 1GHz to 2GHz for detecting the soil moisture by using the cavity resonator technique and impedance bridge technique. These techniques are expensive, complex, no more accuracy and time consuming. Method: The proposed design has fabricated on FR4 substrate with 1.676mm thickness. The simulation analysis has carried out with the help of CST software and the experimental values will be measured by vector network analyzer. The experiment will be performed on the samples of soil and the results shows that the proposed method will be able to detect the high moisture content with high sensitivity and accuracy. Results: The proposed design, it will be very helpful for agricultural field because of got the good return loss as well as gain -28dB and 3.2dB at 2.3GHz and it can be fabricated and measured by the vector network analyzer Conclusions: The proposed design is analyzed for detecting the moisture content with the suitable parameters with the help of CST software as well as used the direct (oven drying) method, this is very easy and less time consuming.

VARIABILITY IN SOIL MOISTURE SAMPLING

1962 ◽  
Vol 42 (1) ◽  
pp. 157-164 ◽  
Author(s):  
W. J. Staple ◽  
J. J. Lehane
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Early Spring ◽  
Frozen Soil ◽  
Sampling Location ◽  
Low Permeability ◽  
Moisture Determination ◽  
Paired Samples ◽  
Small Plot

The standard deviation of soil moisture content in 4-foot profiles of Wood Mountain clay loam at seedtime varied from 0.6 to 1.3 inches. The variability changed from year to year and to some extent from season to season, depending on weather and cropping conditions. Low permeability of partially frozen soil during periods of rapid thaw in early spring was a major factor influencing variability.Choice of sampling location was important in experimental work. The variability was minimized on areas of uniform soil texture and on nearly level well-drained topography. The use of paired samples from adjacent sites reduced the error when changes in moisture content were measured with respect to time or treatment.Six to ten samples from small plot areas may be adequate for moisture determination in many types of experiment. On the other hand, for more precise work thirty samples or more would be required per treatment to provide fair assurance that the LSD between the means of two treatments be less than 0.5 inch of water.

Analysis on Soil Moisture Content in the Middle Reaches of the Yellow River

2011 ◽  
Vol 28 (1) ◽  
pp. 85-91 ◽  
Author(s):  
Run-chun LI ◽  
Xiu-zhi ZHANG ◽  
Li-hua WANG ◽  
Xin-yan LV ◽  
Yuan GAO
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
Yellow River ◽  
The Yellow River
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