1. Milkweed—A war strategic material and a potential industrial crop for sub-marginal lands in the United States

   • Boris Berkman

   OriginalPaper Pages: 223 - 239

2. Utilization abstract

   Abstract Pages: 239 - 239

3. Manicoba and mangabeira rubbers

   • Robert W. Schery

   OriginalPaper Pages: 240 - 264

4. World production and consumption of millet and sorghum

   • Elna Anderson
   • John H. Martin

   OriginalPaper Pages: 265 - 288

5. Utilization abstract

   Abstract Pages: 288 - 288

6. Plant growth-regulators

   • R. L. Weintraub
   • A. G. Norman

   OriginalPaper Pages: 289 - 298

7. Forest-tree genetics research:Populus L.

   • Scott S. Pauley

   OriginalPaper Pages: 299 - 330

8. Correction

   • J. W. Lesley

   Erratum Pages: 330 - 330

9. Utilization abstract

   Abstract Pages: 331 - 331