Abstract: Scarifier for deep strip-tillage, that after a single trip allows the soil to be in adequate conditions for planting or sowing, operating with a great energy efficiency, contributing to an improvement in the production environment. The scarifier comprises a plurality of tillage units (a), spaced apart and located parallel to each other, and wherein each tillage unit (a) comprises a support structure (2) on which the corresponding tines (1a, 1b, 1c) are mounted, the lower ends of which are located at different heights, with the depth below the ground (d) being greater toward the rear of the scarifier. The scarifier preferably incorporates a fertilization system.

Abstract: A sod cutting blade pivotally supported on a plow assembly frame such that the sod cutting blade is able to pivot and pass over an obstruction when encountered during a plowing operation. The plow assembly has a spring that is used to bias the sod cutter into the ground.

Abstract: A process for introducing an optical cable, in the form of a microcable or minicable (1), in solid ground (17) with the aid of a laying unit (23). The microcable or minicable (1) used for this purpose comprises a homogeneous and pressurized-water-tight tube (8) which has an external diameter of from 2.0 to 10 mm and into which optical waveguides (3) are introduced.