No abstract

Highlight Twenty-four IO-acre plots were burned in the Southern Mixed Prairie of Texas under a variety of weather and fuel conditions to determine their effect on 3gnition, burndown, and mortality of mesquite that had been top-killed by spraying. The number of trees that ignited on each plot varied from 33.6 to 94.9% of the total, whereas the number of trees that burned down varied from 14.4 to 89.1%. Mortality varied from 0 to 24%. Large trees were easier to burn down and kill than small trees. Equations that incorporate wind speed, relative humidity, and total fuel were developed to predict ignition and burndown. 2Personal communication with George R. Fahnestock, Fuel Appraisal Systems, 4507 Univ. Way NE, Seattle, Washington.

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No abstract

KocI~iu prostmta (L.) Schrad. (prostrate summer cypress) is a perennial, half-shrub native to the arid and semiarid regions of Russia, central Europe, and the eastern Mediterranean. It is drought resistant, salt tolerant, winterhardy forage which is desimble for big game browseX. prostrata has potential for revegetating critical areas on western rangelands. Since limited research has been reported on germination characteristics, the effects of harvest date, seed drying procedures, length of storage, and storage temperature on germination were evaluated for K. prostmta var. virescens and var. canescens. Seed was collected from nursery plots at the Squaw Butte Station, Burns, Ore., on 6 harvest dates (September 20 to November 9, 1978). Seed was aid-dried or dried at 30°C for 24 hours and one seed lot was germinated immediately, while 3 seed lots were stored for 3 months at-18,4, or 21" C prior to germination trials. K. prostrata var. canescens consistently exhibited higher @<.05) germination percentages than var. virescens. The effect of harvest date was also sign&ant w.05) as both varieties exhibited higher average germination percentage at later harvest dates. Apparently, seeds of either variety did not fully mature until approximately October 20 during the 1978 growing season. Drying procedure affected germination only when seeds were stored for 3 months. Under these conditions air-dried seed had a higher (J&OS) average germination than dried (44.5 and 38.395, respectively). Higher @<.OS) germination occurred following 3 months of storage at 4O C for both varieties (69.4 and 37.9% for var. canescens and virescens, respeqtively). K. prostruta var. canescens collected on November 9,1978, air-dried and stored for 3 months at 4*C had the highest germination (97%).