21. Trees should get water throughout their root zone . 22. Firm the soil around the root zone . 23. The systemic is absorbed by the grass and moves down into the root zone , completing the kill. 24. 100 % sand root zones are used often and are more cost effective from a construction standpoint. 25. Some researchers have used aeroponics to study the effects of root zone gas composition on plant performance. 26. Peridotites associated with Alaskan-type ultramafic complexes are cumulates that probably formed in the root zones of volcanoes. 27. Like most garden plants, trees need an inch of water once a week over their entire root zone . 28. A layer of plywood or mulch spread around the root zone can reduce root death from heavy equipment. 29. His big pivot irrigator stops spraying when neutron probes show that moisture has seeped below the root zone . 30. The entry was deleted again during the preparations for the deployment of DNSSEC at the root zone in 2010.
