subsoil

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subsoil

the soil below the plough layer, which is relatively infertile.
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The optical probe, housed in a steel lens holder, was attached to the rear of the subsoiler chisel to acquire soil spectra from the smooth bottom of the trench.
Half of each field has been treated with the subsoiler, while the other halves have been left alone.
The online soil sensor consists of a subsoiler that penetrates the soil to any depth between 5 and 40 cm depth, making a trench in the soil, whose bottom is smoothened due to the downward forces acting on the subsoiler.
Moreover, disk plough, chisel plough, subsoiler and rotavator are also useful primary tillage implements used by tractors.
For farm machinery dealership Mona Tractors, this has meant a busy period of demonstrations with Sumo's GLS grassland subsoiler.
A non-linear three-dimensional finite element analysis of subsoiler cutting with pressurized air injection.
Reeder RC, Wood RK, Finck CL (1993) Five subsoiler designs and their effects on soil properties and crop yields.
He also uses a subsoiler plow every four years or so--a heavy old implement with a single shank that goes about 16 inches into the soil.
Jason taught me the difference between a V-ripper and a subsoiler, explained the elegance of a circular hay rake and the miracle of a rotary cultivator.
In-row subsoiling at 0 to 40 cm depth (0 to 15.75 in) was performed with a KMC[R] subsoiler equipped with pneumatic rubber closing wheels (Kelly Manufacturing Co., Tifton, Georgia) prior to planting row crops.
A subsoiler shank tilled the soil to a 13-inch (33-centimeter) depth.
Samples were taken with the middle of each sample centered over the irrigation tube or the location where the subsoiler had passed.