There is a vacuum created when water goes past pipe constriction. Air may be pulled into the main flow by drilling hole in near where happens. Venturi aerator an example of application action. A formed at suction holes tube there small difference pressure between input and output sides. To demonstrate link total rate performance, (model 1584) was introduced specific point Biopipe system. For th...

In woody plants, xylem sap moves upwards through the vessels due to a decreasing gradient of water potential from the groundwater to the foliage. According to these factors and their dynamics, small amounts of sap-compatible liquids (i.e. pesticides) can be injected into the xylem system, reaching their target from inside. This endotherapic method, called "trunk injection" or "trunk infusion" (...