You must now obtain a 'Small Lots of Seed' Permit This permit can be obtained free of charge through the APHIS-USDA website. .https://www.aphis.usda.gov/plant-imports/buy-plants-seeds-online The buyer must obtain and provide a Small Lots of Seed Permit to GreenTree Agroforestry Solutions before the order will be shipped
Isebrands, JG, Aronsson P, Carlson M, Ceulmans R, Coleman M, Dickinson N, Dimitriou J, Doty S, Gardiner E, Heinsoo k, Johnson JD, Yoo YB, Kort J, Kuzokina J, Licht L, McCracken AR, McIvor I, Mertens O, Perttu K, Ridell-Black D, Robibson B, Scarascia-Mugnozza G, Schroeder WR, Stanturf J, Volk TA and M Weih. Environmental Applications of Poplars and Willows, Chapter 6 - Poplars and Willows – Trees for Society and the Environment. Edited by JG Isebrands and J Richardson Published by FAO and CABI. p. 258-336.
Marron N, Gielen B, Brignolas F, Jian G, Johnson J D, Karnosky D F, Polle A, Scarascia-Mugnozza G, Schroeder W R, and R Ceulemans. 2013. Abiotic Stresses, Chapter 7 - Poplars and Willows – Trees for Society and the Environment. Edited by JG Isebrands and J Richardson Published by FAO and CABI. p.337-442.
Schroeder W R, Neill B, de Gooijer H and B Hesselink. 2008. Shelterbelts in Western Canadian Agriculture. In: Protective forestation, land amelioration and problems in agriculture of the Russian Federation, VNIALMI Russian Academy of Sciences Volgograd: 51-53
Li T and W R Schroeder. 2003. Chapter 4. Land Preparation and Orchard design. In: Sea Buckthorn (Hippophae rhamnoides L.): Production and Utilization NRC Research Press pp.17-22.
Li T and W R Schroeder. 2003. Chapter 6. Propagation. In: Sea Buckthorn (Hippophae rhamnoides L.): Production and Utilization NRC Research Press pp.27-35.
Schroeder W R. 1990. Shelterbelt Planting in the Canadian Prairies. In: Protective Plantation Technology. K. Xiang, J. Shi, N. W. Baer and J. W. Sturrock. Harbin, China, Publishing House of Northeast Forestry University: 35-43.
