ENERGY BALANCE STUDIES OVER SUDANGRASS, 1962.
AGRICULTURAL RESEARCH SERVICE TEMPE ARIZ WATER CONSERVATION LAB
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During 1962 the energy balance of a sudangrass crop was continuously studied from 5 June through 18 September in Tempe, Arizona. Hourly or halfhourly measurements were made of evaporative flux, net radiation, soil heat flux and sensible heat exchange--the latter by difference. The grass canopy was studied in a number of conditions early emergence before and after irrigation, a complete green cover before and after irrigation, a cover that had developed seedheads, a freshly mown surface before and after irrigation, stages of recovery after mowing, and a full cover that had not received water for five weeks. Detailed energy balances are given for 16 periods of 24 hours, each of special interest. Daily balances are given for the entire period of observation except where unavoidable interruptions occurred. Author