Abstract
In this world, every country have big lands for products in
agriculture. Recently, problems of pollution of air and water due to chemicals
used in agriculture and gardening or golf courses have been recognized.
Residual chemicals in agricultural products has also been a sensitive problem,
In order to improve these problems, high voltage discharges have been studied
for control of weeds. Weeds can be removed by disrupting the cells. Pulsed
spark discharges to weeds also destroy bacteria around their roots since high
electric field appears around the roots. Finally, we found that small weeds 4∼5cm hight and 1∼2mm stem diameter, could be
destroyed by one shot discharge with its electrical energy about 140mJ and
large weeds could also be destroyed using a pulsed voltage about 15kV with
discharge energy of 2J.
Since the spark
discharges take place from the electrode to the neatest or highest weed, the
discharge can selectively destroy weeds which grow faster. The use of pulsed
voltage can restrict the electrical energy of the discharge below the incendiary
level. Also, pulsed spark discharges to weeds destroy bacteria around their
roots since high electric field appears around the roots. At the same time
nitrogen is fixed due to discharges between the roots and soil.
Keywords:
pollution, weed, high voltage, discharge energy, pulsed voltage, bacteria,
electric field