The present invention relates to the exogenous application of signaling chemicals, such as minerals andor small signaling molecules, to change the delta T in differing tissues of a plant, such as a crop plant, to increase development andor productivity of the plant. Prefabricated bottom tower section for a wind turbine comprising electric equipment, e. A motor and a follower are received on the jack screw. The base includes a chamber area adjacent to an opening of a vent chute that leads away from the circuit breaker. , dP between the system and P points of the area, called range-found points, with P\u22673, distributed in K of said images with 1\u2266K\u2266M; acquiring the positioning xm, ym, zm of the detector at acquisition of the M images; measuring the attitude \u03c6m, \u03b8m, \u03c8m of the detector at acquisition of the M images; acquiring the coordinates in these K images of image points, ,. In particular, this invention is directed to the use of an adapted method on specifically composed storage catalysts.