The following articles document the observed affects of growing tree, shrub, and vine seedlings in growth tubes. You will need Adobe Acrobat Reader to access these articles.

"EFFECT OF TREE SHELTERS ON SURVIVAL, GROWTH, AND WOOD QUALITY OF 11 TREE SPECIES COMMONLY PLANTED IN THE SOUTHERN UNITED STATES", by David H. West, Arthur H. Chappelka, Kenneth M. Tilt, Harry G. Ponder and J. David Williams, 1999

"Establishment of a Temperate Agro-forest", C.M. Feldhake and C.M. Schumann, USDA-ARS Appalachian Farming Systems Research Center, 1224 Airport Rd. Beaver, West Virginia, 25813 USA

"FIRST-YEAR EFFECTS OF PLASTIC TUBE SHELTERS, WIRE CAGES, AND FERTILIZATION ON PLANTED NUTTALL OAK SEEDLINGS", Troy S. Taylor and Michael S. Golden

"A Comparison of Seedling Growth and Light Transmission Among Tree Shelters", Hailu Sharew, Anne Hairston-Strang, Maryland Department of Natural Resources, Forest Service, Tawes Office Building, 580 Taylor Avenue, Annapolis, MD 21401

"EFFECTS OF SITE PREPARATION, SEEDLING QUALITY, AND TREE SHELTERS ON PLANTED NORTHERN RED OAKS", John DuPlissis, Xiwei Yin, Melvin J. Baughman

"The Effects of Tree-shelters on Survival and Growth of Black Walnut: First Year Results", Terry Robison, Missouri Department of Conservation, Applying Research in Forestry

"Tree Shelters", Ron Brenneman, Tom Mills, NWTF WILDLIFE BULLETIN NO. 10

"Oak Regeneration Response to Thinning from Below", David W.Countryman, Richard B.Hall, Richard C.Schultz, Carl W.Mize, Paul H.Wray

"Planting Bare Root Trees and Shrubs In Nevada", Wayne S Johnson, Jerry Neufeld, Robert Hammond, John Christopherson.

"Tree Shelters For Seedling Protection And Increased Growth", Dan A. Meyer