Dielectric Properties of Clay Loam Soil at Lower Microwave Frequencies

2013 ◽  
Vol 209 ◽  
pp. 229-232
Author(s):  
Asha Buliya ◽  
K.C. Pancholi ◽  
R.K. Paliwal ◽  
S.P. Bhatnagar
Keyword(s):  
Remote Sensing ◽  
Network Analyzer ◽  
Clay Loam ◽  
Frequency Range ◽  
Clay Loam Soil ◽  
Microwave Frequencies ◽  
Moisture Contents ◽  
Salinity Levels ◽  
Microwave Signals ◽  
Loam Soil

Real and Imaginary parts ( ) of the Complex Dielectric Permittivity (ε*) of Clay Loam soil collected from Nanta Farm, CAD, Kota, Rajasthan have been measured using a Vector Network Analyzer with varied Moisture contents and Salinity levels in the frequency range 150 MHz to 2.2 GHz. Both and are observed to be strongly dependent on moisture content. The Reflection coefficient(R) , Emissivity(e) and Brightness temperature(T_B) of Microwaves for the soil sample were also calculated from the measured permittivity data. These parameters have their own importance in remote sensing of soil moisture using Microwave signals and show expected variations with soil salinity and Microwave frequencies used.

Complex Dielectric Permittivity of Sandy Loam as a Function of Salinity and Biomass at Microwaves

2013 ◽  
Vol 209 ◽  
pp. 116-120 ◽  
Author(s):  
Arun Sharma ◽  
K.C. Pancholi ◽  
S.P. Bhatnagar
Keyword(s):  
Soil Moisture ◽  
Dielectric Permittivity ◽  
Sandy Loam ◽  
Strong Dependence ◽  
Normal Incidence ◽  
Complex Dielectric Permittivity ◽  
Network Analyzer ◽  
Frequency Range ◽  
Moisture Contents ◽  
Loam Soil

Real and Imaginary parts of Complex Dielectric Permittivity (ε’ and ε” ) of Sandy Loam soil have been measured in the frequency range 150 MHz – 2.4 GHz using a Vector Network Analyzer at varied Moisture contents, Salinity and Biomass. The Emissivity of the soil for normal incidence was also calculated from measured values of Complex Permittivity. The measured permittivity data show strong dependence on moisture content. Salinity causes higher permittivity and dielectric loss. Biomass appears to enhance the permittivity data due to increase in porosity of the soil. The emissivity of the soil was observed to decrease with increasing soil moisture and soil salinity, but it increases with biomass.

scholarly journals Medium-frequency electromagnetic device to measure electric conductivity and dielectric permittivity of soils

Geophysics ◽  
2016 ◽  
Vol 81 (1) ◽  
pp. E1-E16 ◽  
Author(s):  
Pauline Kessouri ◽  
Sébastien Flageul ◽  
Quentin Vitale ◽  
Solène Buvat ◽  
Fayçal Rejiba ◽  
...  
Keyword(s):  
Dielectric Permittivity ◽  
Water Content ◽  
Electric Conductivity ◽  
Detection Threshold ◽  
Clay Loam ◽  
Frequency Range ◽  
Clay Loam Soil ◽  
Medium Frequency ◽  
Loam Soil ◽  
Medium Frequency Range

An electromagnetic (EM) tool working in the medium-frequency range allows the determination of the electric conductivity and dielectric permittivity of soils with a single measurement. It brings information about different state parameters of soils, especially their water and clay contents for a significant volume of investigation. To investigate these properties, a medium-frequency-range EM prototype, the CE120, was built using a perpendicular coil Slingram configuration with a working frequency of 1.56 MHz and a fixed coil spacing of 1.2 m. This configuration was chosen using modeling with the purpose of measuring electric resistivities up to a few thousands of ohm-meters and relative dielectric permittivities as low as two. These thresholds match the expected parameters values in the medium frequency range. Moreover, the CE120 characteristics allowed for an investigation depth between 2 and 2.5 m, depending on the nature of the soil. The prototype was tested on two different soils with water variations: sandy alluvia and clay-loam soil. The electric resistivities of the sandy alluvia can reach [Formula: see text], which is higher than the detection threshold of the CE120. Only the measured dielectric permittivity can be interpreted in terms of water contrasts. Four different zones corresponding to four different water contents were detected. For the clay-loam soil, the electric conductivity and dielectric permittivity measure the water content variations created by the wheat roots. At 1.56 MHz, the high-frequency equations linking the dielectric permittivity to the volumetric water content have a limited validity. Laboratory measurements for each different soil type are necessary to deduce empirical relations. In both cases, the results are coherent with the measured mass water content variations.

Effect The Treatments of Biofertilizer and Mineral Fertilizer on Content of N P K of Soil Cultivated With Crop Corn (Zea Mays L).

2019 ◽  
Vol 9 (2) ◽  
pp. 247-256
Author(s):  
Mohammed Aajmi Salman ◽  
Jawad A. Kamal Al-Shibani
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Mineral Fertilizer ◽  
Silty Clay ◽  
Clay Loam ◽  
Potassium Fertilizer ◽  
Clay Loam Soil ◽  
Silty Clay Loam ◽  
Fall Season ◽  
Loam Soil

Beneficial microorganisms play a key role in the availability of ions minerals in the soil and use Randomized Complete Block Desing ( R.C.B.D ). The objective of this paper to the study effect of the of biofertilizer and miniral treatments on availability of NPK for crop corn zea mays L.Two types of biofertilizer are Bacterial Bacillus subtilis and Fungal Trichoderma harianum. Three levels of potassium fertilizer are (2.9533, 0.4000 and 2.9533). A field experiment in fall season of 2018 Has been conducted in silty clay loam soil. The experimental Results indicated that Bacillus and Trichoderma inoculation separately or together Have made a significant effect to increase in the availability of N P K in the soil compare to other treatments. The grain yield is where (2.9533, 0.4000 and 2.9533) of bacterial and fungal bio-fertilizer and potassium fertilizers respectively as compared to the control.

Effect of Cow Manure on Dielectric Properties of Clay Loam Soil at Microwave Frequency

2012 ◽  
Vol 2 (2) ◽  
pp. 374-375
Author(s):  
Asha Buliya ◽  
◽  
K. C. Pancholi K. C. Pancholi ◽  
R. K. Paliwal R. K. Paliwal
Keyword(s):  
Dielectric Properties ◽  
Microwave Frequency ◽  
Cow Manure ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil

Degradation of oxyfluorfen in sandy clay loam soil

2020 ◽  
Vol 8 (6) ◽  
pp. 1038-1041
Author(s):  
C Bharathi ◽  
P Murali Arthanari ◽  
C Chinnusamy
Keyword(s):  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Loam Soil

scholarly journals Extension of an extraction method for the determination of 305 organic compounds in clay-loam soil to soils of different characteristics

MethodsX ◽  
2021 ◽  
pp. 101476
Author(s):  
Andrea Acosta-Dacal ◽  
Cristian Rial-Berriel ◽  
Ricardo Díaz-Día ◽  
María del Mar Bernal-Suárez ◽  
Manuel Zumbado ◽  
...  
Keyword(s):  
Organic Compounds ◽  
Extraction Method ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Different Characteristics

Managing organic carbon of sandy clay loam soil with organic amendments to promote particle aggregation

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Haroon Shahzad ◽  
Muhammad Iqbal ◽  
Noman Latif ◽  
Muhammad Arshad Khan ◽  
Qudrat Ullah Khan
Keyword(s):  
Organic Carbon ◽  
Organic Amendments ◽  
Particle Aggregation ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Sandy Clay Loam ◽  
Sandy Clay ◽  
Loam Soil

Experiments measuring the residual effects of nitrogen fertilizers

1965 ◽  
Vol 65 (2) ◽  
pp. 195-200 ◽  
Author(s):  
F. V. Widdowson ◽  
A. Penny
Keyword(s):  
Potato Crop ◽  
Nitrogen Fertilizers ◽  
Residual Effects ◽  
Wheat Crop ◽  
Clay Loam ◽  
Clay Loam Soil ◽  
Loam Soil ◽  
Potato Yields

The experiment testing N residues (made on a clay-loam soil) clearly showed that N applied for potatoes benefited the following wheat crop, but that N applied for wheat benefited the following potato crop little. There were no worth-while 1. An experiment on a clay-loam soil measured responses to three amounts of nitrogen on alternate crops of wheat and potatoes; these dressings were tested in all combinations with three rates of N applied 1 and 2 years previously. Nitrogen applied for potatoes consistently increased yields of following wheat. The residue from applying 1·5 cwt. N/acre for potatoes was equivalent to topdressing the wheat with 0·55 cwt. N/acre; the value of the residue was decreased by applying N to the wheat. Potato yields were increased little by applying N to the preceding wheat crop and the residues were of little significance when compared with the responses to new N. There was no gain from N applied 2 years previously for either crop.

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