Experiments have been conducted to determine the correlations between the available hourly and daily photosynthetically active radiation (PAR) and total solar radiation. PAR was measured in the photon flux density unit of mol s** minus **1 m** minus **2 and total radiation was in the radiant flux density of W m** minus **2. Regression equations are presented in this paper for two purposes: (a) to show the predictability of PAR using available total solar radiation data, and (b) to provide empirical equations for estimating direct and diffuse PAR based on total radiation values.
|Original language||English (US)|
|Number of pages||5|
|Journal||Transactions of the American Society of Agricultural Engineers|
|State||Published - Sep 1 1987|
ASJC Scopus subject areas
- Agricultural and Biological Sciences (miscellaneous)