On-the-go measurement of soil water content and mechanical resistance by a combined horizontal penetrometer

Ying, Sun; Ma, Donghao; Lammers, Peter Schulze; Schmittmann, Oliver; Rose, Marie-Jeanette

doi:10.1016/j.still.2005.02.022

Cited by 46 publications

(23 citation statements)

References 14 publications

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“…Nothing was reported in the literature on this kind of work for a long time, and the Haines and Keen (1925a) paper has been cited only cited 5 times (Google Scholar, February 2015). Published work on the 'on-the-go' soil strength measurement seemed to begin with Stafford and Hendrick (1985) and with more recent developments by Sun et al (2006) and with the advent of site-specific soil and crop management. Although this study is not digital soil mapping, it is the first proximal soil sensing instrument and study.…”

Section: Proximal Soil Sensingmentioning

confidence: 99%

Digital soil mapping: A brief history and some lessons

2016

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Section: Proximal Soil Sensingmentioning

confidence: 99%

Digital soil mapping: A brief history and some lessons

2016

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“…Proximal soil sensors also allow direct field‐scale measurement of soil physical properties, such as penetration resistance and moisture content. One of the unique sensors was developed by Sun et al (2006), who devised an on‐the‐go soil draft sensor based on a horizontal cone penetrometer mounted on a pivoting force lever. The penetrometer also incorporated a fringe‐capacitance sensor that measures the dielectric properties of the soil which were calibrated to volumetric soil moisture content.…”

Section: Proximal Soil Sensingmentioning

confidence: 99%

Pedometrics Research in the Vadose Zone—Review and Perspectives

Minasny

Whelan

Triantafilis

et al. 2013

Vadose Zone Journal

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Pedometrics is the application of mathematical and statistical methods for the study of the distribution and genesis of soils. Pedometrics research in the vadose zone comprises studies of the spatial and temporal dynamics of soil properties as a scientific challenge to increase our understanding of the processes at the earth's surface. While geostatistics has been the main topic of investigation, pedometrics in the vadose zone covers broader areas, which can be summarized in three main topics: (i) characterization of variability and prediction of variation of soil, (ii) sampling, measurement, and inferences of soil properties and processes, and (iii) dynamic spatiotemporal modeling. This review highlights some of the key common research areas for pedometrics in the vadose zone, showing the synergy between pedometrics and vadose zone science. A strength of pedometrics is estimating the spatial distribution of soil properties using empirical approaches. However, pedometrics needs to incorporate process‐based knowledge, which adds the pedological and physical significance to the statistical robustness of predictions. A natural collaboration would therefore be with vadose zone scientists. Dynamic spatiotemporal modeling in a Bayesian hierarchical modeling framework provides a platform that will enhance collaboration between both disciplines. A future collaborative project can be envisaged to develop a global vadose zone model simulating fluxes and stores of soil water, solute, heat, and gas to address globally important issues.

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“…The principle of our measurement circuit is often used in the field of frequency-domain dielectric sensors [20,21,22,23,24,25], and the measurement apparatus is as shown in Figure 1a. The appearance of the corn ear is as shown in Figure 1c.…”

Section: Methodsmentioning

confidence: 99%

Nondestructive In Situ Measurement Method for Kernel Moisture Content in Corn Ear

Zhang

Fan

et al. 2016

Sensors

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Moisture content is an important factor in corn breeding and cultivation. A corn breed with low moisture at harvest is beneficial for mechanical operations, reduces drying and storage costs after harvesting and, thus, reduces energy consumption. Nondestructive measurement of kernel moisture in an intact corn ear allows us to select corn varieties with seeds that have high dehydration speeds in the mature period. We designed a sensor using a ring electrode pair for nondestructive measurement of the kernel moisture in a corn ear based on a high-frequency detection circuit. Through experiments using the effective scope of the electrodes’ electric field, we confirmed that the moisture in the corn cob has little effect on corn kernel moisture measurement. Before the sensor was applied in practice, we investigated temperature and conductivity effects on the output impedance. Results showed that the temperature was linearly related to the output impedance (both real and imaginary parts) of the measurement electrodes and the detection circuit’s output voltage. However, the conductivity has a non-monotonic dependence on the output impedance (both real and imaginary parts) of the measurement electrodes and the output voltage of the high-frequency detection circuit. Therefore, we reduced the effect of conductivity on the measurement results through measurement frequency selection. Corn moisture measurement results showed a quadric regression between corn ear moisture and the imaginary part of the output impedance, and there is also a quadric regression between corn kernel moisture and the high-frequency detection circuit output voltage at 100 MHz. In this study, two corn breeds were measured using our sensor and gave R2 values for the quadric regression equation of 0.7853 and 0.8496.

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On-the-go measurement of soil water content and mechanical resistance by a combined horizontal penetrometer

Cited by 46 publications

References 14 publications

Digital soil mapping: A brief history and some lessons

Digital soil mapping: A brief history and some lessons

Pedometrics Research in the Vadose Zone—Review and Perspectives

Nondestructive In Situ Measurement Method for Kernel Moisture Content in Corn Ear

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