It is said that cool air sinks and warm air rises. This leads one to believe that there will be cooler air at the bottom of a slanted field and warmer air at the top. If you are growing plants that are more cold tolerant, say apple trees, it may makes sense to have them at this lower elevation. Maybe your fig trees will be higher up. While this seems simple, there are other factors to take into consideration such as air pooling and collecting and how objects in the landscape may effect air flow and were cool or warm pockets may reside. One example I have seen is a field edge with a heavy tree line at the lower elevation end of a field where cool air pooled, resulting in more frost there, because this air did not have anywhere to flow due to the tree line. Does anyone have any personal experiences of objects in their food forest/orchard causing consistent microclimates due to air pooling?