Biological control of weeds in compacted soil cultures.

Biological Control of Weeds in Compacted Soil Cultures: V. P. Sokoloff 271 Technical Papers Absorption Spectra of Chlorophylls in Solutions at -Low Temperatures-Equilibria Between Isomers: Simon Freed and Kenneth M. Sancier _ 275 The Purlnonay Circulation as a Source of Leucocytes-bid Platelets in Man: H. R. Bierman, K. H. Kelly/,F. W. King, and N. L. Petro,kis 276 Effects of Male Hormone upon the Tail of the Slider Turtle, Pseudemys scripta troostii: L. T. Evans _ _ 277 Microspectrophotometry and Cytochemical 4 Analysis of Nucleic Acids: Hiroto Naora 279 A Medium for the Study of the Bacterial Oxidation of Ferrous Iron: William 'W. Leathen, Lois D. McIntyre, and S. A. Braley, Sr. _____ 280 Lactic Dehydrogenase and DPN-ase Activity of Blood: Spyridon G. A. Alivisatos and Orville F. Denstedt _ 281 Low-Temperature Sterilization of Organic Tissue by HighVoltage Cathode-Ray Irradiation: Irving A. Meeker, Jr., and Robert E. Gross ___ . 283