<p> The radiation balance of a dwarf apple orchard was evaluated. Results compared favourably with those for a single apple tree in an earlier investigation. Reflection, heating and longwave exchange coefficients were analysed. </p> <p> Transmitted global radiation was measured with moving and stationary sensors. Coefficients for the partitioning of incident global radiation were calculated. A relationship between photosynthetically active radiation and global radiation was established. Coefficients for the partitioning of incident photosynthetically active radiation were obtained and compared to the global radiation components. A problem associated with the measurement of transmitted radiation is discussed briefly. </p> / Thesis / Master of Science (MSc)