Shade may be critical through the summer for conifer regeneration survival on warm, dry sites. Shadow lengths vary by latitude, aspect, a slope; southerly aspects have shorter shadows than northerly aspects at the same time. Differently shaped trees also produce different shadow lengths. This guide provides silviculturists with a method for determining tree shadow lengths in a straight line from the tree's base to the shadow tip from southern Utah to northern Idaho for May 10 through Oct. 11 on different slopes, aspects, a for two tree shapes. Charts a tables.Sweep per hour was calculated by dividing shadow sweep angle for the 4-hour period by four. We developed a computer model to derive the tree length factors. We reduced the shadow length calculations to a aquot;tree length factoraquot; for the dates, anbsp;...
|Title||:||Determining Individual Tree Shade Length|
|Author||:||Kathleen Geier-Hayes, Mark A. Hayes, Douglas D. Basford|
|Publisher||:||DIANE Publishing - 1998-05|