Irrigating Young Trees

The smaller canopy of yorng trees results in less evapotranspiration than in mature trees. The evapotranspiration of young trees can be estimated from figure 2 by adjusting mature tree evapotranspiration based on the percent ground shading of the young trees, which can be estimated by examining the extent of the orchard floor shaded at midday. Note that evapotranspiration increases at a rate approximately twice that of the percent ground shading. Maximum evapotranspiration occurs at about 60 to 70 percent ground shading.

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"Reducing Runoff from Irrigated Lands: Understanding Your Orchard's Water . . ."- ANR Pub 8212