DETERMINATION OF SOIL TROPHICITY BY ELECTROPHYSICAL METHOD. MESSAGE 1. DEVICE AND LABORATORY TECHNIQUE

The purpose of this work was to develop a device and technique for determining the soil trophiсity using electrophysical method based on measurement specific resistivity (SR). In proposed F. Wenner installation is used as sensor. has modular design includes voltage boosting module, PWM generator rectangular pulses, signal inverter an H-bridge that switches polarity power supply in order prevent polarization electrodes. metrological characteristics well influence electrodes immersion depth substrate studied are determined. Its significant nonlinear character which approximated by function were established. simplest equations bringing measured values RS certain object proposed.