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<br />7 <br /> <br /> <br />;,Hl1946 <br /> <br />g, Operation of Evapotranspiration Tanks Near Yuma, Arizona, McDonald <br />and Hughes (manuscript), USGS. <br /> <br />h. Germination of Saltcedar Seed, by Wilgus and Hamilton. WEEDS, <br />Vol. 10, No, 4, October 1962. <br /> <br />i. Plastic M.,mbrane Tanks for Evopotranspiration Determinations, by Dylla <br />and Tovey, AGR. ENGIN., October 1962. <br /> <br />i. A Study of Phreatophyte Growth in the Lower Arkansas River Valley of <br />Colorado, by Morton W, Bittinger and Glen E. Stringham, Civil . <br />Engineering Research Section, Colorado State University, April 1963. <br /> <br />k, Introduction, Spread, and Areal Extent of Saltcedar (Tamarisk) in <br />Western United States, was transmitted for publication in May 1963. <br /> <br />3. Continuing Projects <br /> <br />a. Publications in the Phreatophyte Library at Arizona State University <br />at Tempe, Arizona, were increased by 75 to a total of about 400. <br /> <br />b. The Subcommittee is compiling data on costs of eradication of phreatophytes <br />and the economics of water salvage or water conservation by these various <br />methods. <br /> <br />c. Studies relative to various methods of eradication of various species of <br />phreatophytes, and to the quantities of water that may be salvaged, are <br />being conducted by many different agencies under varying climatic water <br />tables, soils and plant conditions, <br /> <br />4. Recently Initiated Projects: <br /> <br />A task force on Plant Succession was nomed in order to meet a need for collecting <br />information on change in vegetative cover in phreatophyte areas, both natural and <br />as a result of the clearing operations. <br /> <br />Recreation Subcommittee <br /> <br />1. Meetings: <br /> <br />, <br /> <br />The Subcommittee held four meetings during the year. These were at Santa Fe, <br />New Mexico, on September 5, 1962; Las Vegas, Nevada on December 4, 1962; <br />S<!I<!:ramento, Cal ifornia on March 27-28, 1963, and the Gunnison, Colorado <br />meeting on June 5, 1963. <br /> <br />2, Pub I ications: <br />The follow ing publ i cations were prepared and forwarded to the parent committee <br />