Cupric Ion as a Tracer to Measure Spray Application Efficiency
- R. L. Nichols,
- T. P. Gaines and
- M. G. Stephenson
Water in neutron-probe access tubes and mini-rhizotrons impedes the acquisition of accurate data under wet field conditions. When such situations arise, water must be extracted before data can be taken. The objective was to design, construct, and use a pump that would be easy to operate, portable, and inexpensive. The pump was found to be a useful tool for extracting undesired water from access tubes and mini-rhizotrons, Only one to three strokes of the pump were necessary to remove all but about 0.05 to 0.1 L of water from a 2.5-m-long neutron access tube that was completely filled with water. The pump, which is easily constructed with materials available at any hardware store, proved to be an easy-to-use and costeffective tool for field use.
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