Abstract
This paper describes preliminary results on the build-up mechanism of physical quantities within a corn plant canopy. Small polyethylene covered net radiometers were constructed and used to measure the height distribution of net radiation. Miniature aspirated psychrometers were also constructed and used to collect data on the air temperature and water vapor pressure profiles within the canopy. Sample air from nine levels within the canopy was collected into beach balls using a pump system (see Fig. 3). CO2 concentration in sample air was determined with an infra-red gas analyser. The energy balance approach was utilized to evaluate the fluxes of sensible heat, latent heat and carbon dioxide by layers within the canopy. The results so obtained are presented in Figs. 4, 5, 6 and 7.
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