For measurements of the vertical transport of heat and momentum in the turbulent and slightly unstable boundary layer above a maize crop eddy-correlation techniques were applied. In addition to a vertical Gill-propellor anemometer and a Gill-propellor bivane, a cruciform hot-wire probe, mounted on a small windvane, were used. With this hot-wire system the heat and momentum fluxes could be measured in a relatively simple way. The possibilities and limitations of this system were checked.
Bottemanne, F. A. (1979). Eddy-correlation measurements above a maize crop using a simple cruciform hot-wire anemometer. Agricultural meteorology, 20(5), 397-410. https://doi.org/10.1016/0002-1571(79)90015-3