soil water measurement Articles
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Evaluation of three models that describe soil water retention curves from saturation to oven dryness
Measuring a soil water retention curve (SWRC) with the pressure plate device is generally limited to matric suctions 1500 kPa. A few models have been proposed to describe the SWRC from saturation to oven dryness using measurements in the pressure plate matric suction range. The development and validation of these models were mostly based on a limited set of published measurements, and in general, ...
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Performance Evaluation of Selected Soil Moisture Sensors
Abstract Irrigation water management practices could greatly benefit from using soil moisture sensors that accurately measure soil water content or potential. Therefore, an assessment on soil moisture sensor reading accuracy is important. In this study, a performance evaluation of selected sensor calibration was performed considering factory- laboratory- and field-based calibrations. The selected ...
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Type of soil moisture sensor
Soil moisture sensor is an important tool in modern agriculture and horticulture. These devices measure the amount of water present in the soil, an important parameter in managing irrigation and ensuring that plants get the right amount of water.In this article, we will discuss the different types of soil moisture sensors, how they work, and their applications in agriculture and horticulture.Type ...
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Soil Water Sensors for Agriculture – Theory and Issues
Soil water sensors have been used for irrigation and water management in agriculture for many years, but with limited success in many cases. Nonetheless, the use of soil water sensors in increasing as water scarcity increases and, conversely, problems associated with over irrigation also increase. Common problems with soil water sensing included sensor failure, problems with wiring, lack of or ...
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Temperature Dependence of Soil Water Potential
To understand the process of coupled heat and water transport, the relationship between temperature and soil water potential must be known. Two clays, Avonlea bentonite and Lake Agassiz clay, are being considered as the clay-based sealing materials for the Canadian nuclear fuel waste disposal vault. Avonlea bentonite is distinguished from Lake Agassiz clay by its high sealing potential in water. ...
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Extension of an existing model for soil water evaporation and redistribution under high water content conditions
Most crop, hydrology, and water quality models require the simulation of evaporation from the soil surface. A model developed by J.T. Ritchie in 1972 provides useful algorithms for estimating soil evaporation, but it does not calculate the soil water redistribution resulting from evaporation. A physically-based model using diffusion theory, described previously by Suleiman and Ritchie in 2003, ...
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The Accurate Way to Soil Moisture Sensing
Why Acclima soil moisture sensor technology is superior in terms of accuracy and cost Permittivity is a property of matter and is well characterized especially for materials that are electrically non-conductive. Water in its pure form is non-conductive. Permittivity quantifies the charge holding capacity for insulating materials. It is the ratio of stored electric charge to an applied electric ...
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Estimating the contribution of groundwater to rootzone soil moisture
In the Huaibei Plain basin, China, soybean is a main crop. During the soybean growth period, rainfall can vary largely and depth to watertable can also vary largely. The amount of water supplied to the soybean rootzone by groundwater affects soybean growth and yield. Accurate simulation of groundwater contributions to soybean rootzone soil moisture (groundwater contribution) can be important ...
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Evaluation of a Direct-Coupled TDR for Determination of 1 Soil Water Content and Bulk Electrical Conductivity
Signal degradation in coaxial cables and interconnects is a long-standing problem in the practical deployment of time domain reflectometry (TDR) for soil water monitoring. Acclima, Inc. has recently commercialized a TDR sensor (TDR-315) with all electronics required for waveform acquisition embedded in the probe head. We calibrated ten TDR-315 sensors and conventional TDR for apparent ...
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A model approach to evaluate irrigation system water balance: an example from the Gediz Basin, Turkey
An increase in the amount of water used for agriculture has resulted in the need for water savings and measurements in the agricultural sector. With the increasing competition for water, not only should irrigation water be considered, but also an approach encompassing the total water balance is necessary. A clear understanding of all the components of the water balance is essential so as to ...
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What is Soil EC Sensor?
Soil EC (Electrical Conductivity) sensor is an essential tool for modern agriculture, enabling farmers to optimize crop yields by measuring the nutrient levels in the soil. EC sensors measure the soil's ability to conduct electricity, which is a proxy for soil salinity and nutrient content. This article will explore the basics of soil EC sensors, their applications in agriculture, and the factors ...
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Measurement of Steady-State Soil Water Flux across a Soil Horizon Interface
Soil horizon interfaces have been shown to be focal points for localized, three-dimensional redistribution of water and solutes in field soils. Therefore, understanding of the physics of water flow and transport in layered soils requires experimental observations of the magnitude and variability of local soil water flux under a variety of well-defined boundary conditions. We developed a time ...
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The Role of Portable Soil EC Detectors in Enhancing Agricultural Productivity and Water Management
Agriculture is a crucial aspect of our global food supply chain, and proper soil management is essential for sustainable crop production. Portable soil EC detectors have become an invaluable tool for agricultural managers, providing them with real-time soil EC (electrical conductivity) readings that can help optimize crop growth and water management. In this article, we will explore the role of ...
By JXCT
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Hydrological effects of revegetation on hillsides - Case Study
Project Hydrological effects of revegetation on hillsides in the Baviaanskloof, South Africa Carried out by Marjan Sommeijer Country South Africa Background research Marjan Sommeijer travelled to Baviaanskloof in South Africa in 2010 to conduct research for her placement as part of her Bachelor’s degree in International Land and Water Management at Wageningen University. The ...
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Precision viticulture technology a key to producing premium quality wines in changing climate [part 2]
In the first part of the article, we wrote about how precision viticulture technologies can help with choosing long-term and short-term cultivation strategies in order to adapt to climate changes, and named some of the precision viticulture technologies that exist on the market. Now let’s have a look at how and which precision viticulture technologies can help with specific vineyard ...
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Tree, Crop & Plant Stress – A Primer on Abiotic and Biotic Stressors
The natural conditions in which plants and trees grow are neither uniform nor controlled. Many changes or fluctuations, even if they are temporary, can have a negative impact on and stress plants. The factors which can lead to stress can be one of two types: abiotic or biotic. Stress can have serious repercussions on various phases of a plant’s growth and, ultimately, crop productivity. ...
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Tree, crop & plant stress – A primer on abiotic and biotic stressors
The natural conditions in which plants and trees grow are neither uniform nor controlled. Many changes or fluctuations, even if they are temporary, can have a negative impact on and stress plants. The factors which can lead to stress can be one of two types: abiotic or biotic. Stress can have serious repercussions on various phases of a plant’s growth and, ultimately, crop productivity. ...
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Impact of Agri-environment measures
The application of agri-environment contracts concerning 1 farmer in every 7 and delivering environmental services over 20% of European farmland, marks a very significant step towards sustainability. The target set in the 5th Environmental Action Programme of 15% coverage by 2000 has thus already been exceeded. The requirement on Member States to apply the regulation throughout their territories ...
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