Soil - In situ soil physical research

Hand Penetrometer Eijkelkamp

Penetrometers are used to determine the resistance to penetration (bearing capacity) of a soil. The Eijkelkamp Penetrometer is delivered in two different sets: 06.01.SA Hand penetrometer Eijkelkamp, set to a depth of 1 meter 06.01.SB Hand penetrometer Eijkelkamp, set to a depth of 3 meter Basically the penetrometer consists of a measuring instrument, a probing rod and a cone. The device ...

Guelph and Ksat

09.07 Guelph constant head permeameter The Guelph permeameter is a ‘constant head’ permeameter that operates in accordance with the principle of the Mariotte bottle. After boring a hole the Guelph permeameter is placed. The water from the permeameter slowly flows into the auger hole and penetrates into the soil. At a certain moment a saturated ‘bulb’ is formed and the ...

Hooghoudt and Plácido

Determination of the water permeability is important for agricultural- and for environmental soil research. On the basis of the permeability factor (K-factor) irrigation- and drainage systems are designed. Also with respect to the extend of the spreading of possible pollution the permeability factor of the soil is of great importance. 09.01 Hydraulic conductivity test kit, model Hooghoudt ...

Rainfall simulator

09.06 Rainfall simulator The extent to which the soil is sensitive to erosion is determined largely by the composition of the soil. Knowledge of the sensitivity to erosion is important for the development of a certain plot. The sensitivity to erosion is hard to measure. Absolute values can not be obtained. It is, however, possible to obtain a reasonable indication by means of a relative ...

Oxygen diffusion meter

In plant cultivation it is very important that the soil has proper ventilation. The necessary oxygen supply for the roots and the discharge of the carbon dioxide gas that is formed there, in case of most cultivated growth, takes place via the soil. Also soil chemical processes depend on the presence of oxygen in the soil. 14.36 Oxygen diffusion meter The oxygen diffusion meter measures the ...

Penetrograph

The penetration resistance of the ground can be determined in the field, using a penetrometer. One of the range of penetrometers is the mechanical recording penetrograph. The penetration resistance is a means of determining the ground load-bearing capacity, and the ease with which roots will grow through the ground. Determining the load-bearing capacity is of the greatest importance in the ...

Penetrologger

The resistance to penetration is a means of determining the ground load-bearing capacity, and the ease with which roots will grow through the ground (important when agricultural, rural- and civil engineering techniques are involved). The resistance to penetration is a mechanical characteristic that, given a certain texture, depends on changing parameters such as degree of humidity, density and ...

Field inspection vane tester

The shear strength or stress of the soil depends on different soil characteristics such as for instance: the granular composition, the humus content, the humidity and (in case of vegetation covered areas) the degree of coverage and the density of the roots. In order to determine the shear stress in the strata in for instance a profile pit, on the surface (for instance a sports terrain), at the ...

Vane borer pocket vane tester

14.08 Field inspection vane borer, standard set for measurement up to 160 kPa (16 t/m2) and a depth of 10 m The robust field inspection vane borer is a somewhat heavier tool for measuring the shear strength in the field. Without pre-drilling a hole the vane can be pushed or hammered into the soil. If the soil is too hard, then it is recommended to pre-drill a hole. Measurements can be ...

pH Nitrachek

08.10 Hellige pH-indicator The Hellige pH-indicator is a very simple apparatus to estimate the pH (acidity) of a soil for the purpose of a soil suitability indication and straight forward fertilizing advise. The pH is determined on the basis of colour comparison. 18.40 Nitrachek reflectometer The Nitrachek reflectometer is a pocket size digital measuring instrument for a simple and ...

Soil test kits

18.02 Soil test kit for macronutrients & pH 18.03 Soil test kit for macronutrients, pH, humus, calcium & magnesium 18.06 Soil test kit for macronutrients, micronutrients & pH The (agricultural) soil test kits offer simplified methods for determination of available nutrients found in agricultural soils. A series of rapid, accurate chemical tests use standardized reagents to ...

Gypsum blocks & Watermark

14.22 Soil moisture measuring system with gypsum blocks The soil moisture meter can be used in combination with soil moisture blocks. The soil moisture content is determined by measuring the resistance between two electrodes inside the gypsum blocks. The condition for reliable measurements is the optimal contact between sensor and soil. The gypsum blocks are permanently buried in the soil at ...

Thetaprobe

The Thetaprobe soil moisture sensor measures the soil moisture volume percentage by applying the Frequency Domain technique. The Thetaprobe measures the soil moisture volume percentage by measuring the changes in the dielectric constant. The sensor consists of a sturdy, watertight synthetic housing which contains the electronics. The sensor is able to measure within a measuring range of 5 - 55 ...

Soil moisture sampling

Soil moisture sampling is the sampling of soil moisture in the unsaturated zone of the soil. there are mobile systems and setups with a permanent location for continuous sampling. Depending on the purpose of the research it is possible to select between samplers in which the sampling is done via a thin pes tube or via ceramic, glass or plastic cups. All samplers are available in various ...

EC - probe

In irrigation areas, one is often confronted with salinization problems. In order to acquire the necessary understanding regarding these issues, it is very important to check the salinity of the soil regularly. Also in examining ecosystems that are influenced by salt water (lagoons, etc), it is necessary that we know the salinity of the soil. Eijkelkamp Agrisearch Equipment has developed a ...

W.E.T. sensor

The W.E.T. sensor has been developed together with, amongst others, the Institute of Agricultural and Environmental Engineering (IMAG-BV), Wageningen, the Netherlands. The WET sensor measures three vital soil properties directly within the soil: Water content, Electrical conductivity and Temperature. The sensor is unique in its ability to measure pore water conductivity, which is the EC of the ...

Surface Penetrometers

The hand penetrometer for top layers is a device that is used to determine the penetration resistance of top layers. Because of the limited overall length of the device, the hand penetrometer can also be used for horizontal measurement, for instance in the walls of profile pits. The principle of the hand penetrometer is based on measuring the highest penetration resistance of a cone over a ...

TDR soil moisture meters - Trase

14.63 Trase soil moisture measuring system The Trase system is a complete (modular) measuring instrument for measuring and storing moisture data applying the TDR-technique. The open system allows for different cards to be built-in and makes the instrument suitable to meet future requirements. The instrument can be supplied in two different designs, with or without built-in multiplexer ...

TDR soil moisture meters - Trime

A very accurate method that can be easily applied to determine the moisture content is the Time Domain Reflectrometry (TDR). The TDR-method allows for accurate measuring results that are immediately available. The principle of the TDR-technique is based on measuring the propagation time of an electromagnetic pulse along measuring pins in the sample. The propagation time depends on the humidity ...

Tensiometers - electronic

14.04.08 Tensior 3 with electronic pressure transducer The Tensior 3 is a tensiometer with an electronic sensor giving a continuous measuring signal (in hPa). The measuring results are read with a read-out device or datalogger. The tensiometer can only be used in frost free periods, because the pressure sensor is located in the top end of the tensiometer. 14.04.09 Tensior 4 with ...

Tensiometers - set, standard, Jet-fill, Quick draw, electronic

The right quantity of water in the soil is of primary importance for an optimum plant growth and yield of crop. Measuring the soil moisture content (in percentages) as well as the determination of the soil suction (in hPa, mbar or cbar) in the soil therefore is one of the most important aspects of complete agricultural physical soil research. 14.04 Tensiometerset 14.04.03 Standard ...

Water infiltration measurements

The measure of infiltration of water into the soil is an important indication concerning: the efficiency of irrigation and drainage, optimizing the availability of water for plants, improving the yield of crops and minimizing erosion. 09.04 Double ring infiltrometer The double ring infiltrometer is a simple instrument that is used to determine the rate of infiltration of water into the ...