I agree with Killer. I have done a bunch of test runs for Subbing and if you nuke a clean sample for about 8 seconds it seems to stay at about 97.3 to 97.8 for several hours. Just make sure your test is within 2 hours or so and you should be fine.
Allee Elm. Ulmus parvifolia. Ulmaceae. No Image Available: Height 30'-40' Spread 35'-45' Deciduous. The Allee Elm is a large deciduous tree that grows in most soils. Leaves turn a golden color in fall with distinctive peeling bark. Drought tolerant.
Examine the tree in the winter. Elms are deciduous, meaning they shed their leaves once each year, starting in the fall. By the winter, they will be bare of leaves, and then in the spring they will start to re-grow their leaves. If you notice this foliage pattern, you might have an elm.