an instrument for measuring the probe pressure resistance of a material, e.g., soil, to penetration by a rod, so providing an estimate of root penetration
Each package must bear the following particulars in letters grouped on the same side, legibly and indelibly marked and visible from the outside ... number of units (optional), minimum sugar content, measured by refractometer and expressed in Brix degrees (optional), maximum firmness, measured by penetrometer and expressed in kg/O,5 cm2 (optional) ...
