No .. 1'0 SUGAR PINE REGENERATioNlf w·ere o there were 19 observed over a cones were years, means of a 20 p. - The brush was removed Division of Plant Disease toothed blade brush the eradicate concentrated Ribes@ In bear-clover, howout of e. fe·w clumps often cleared was necessary to cover the 1:1ree. in it at each other. the brush was removed 9 the tractor was backed across with the blade lowered to level the soil. The tractor driver was assisted a helper who hidde~ ~+,,=~'~, from the teeth of the to the brush teeth have decreased the time of 37 , 3 feet square, 4 divided into sampling seed supply, 16 for natural reproThe and 16 for for shifting any :rooks o:r .~~~~~~~~~~Y·· Four seed n each plot the in •• On November 12. 1941, in each of the 16 the soil. The seed was a in the Feather River November 1941, there \'\re:re on an average, 1..4 good s per trap in the bear·elove:r plots and 2,.6 good brl,l.sh plots.. On the ba.sis of this samp1et it about 70 percent of the natural reproduction quadrats one or more good sugar pine • Natura~ seedlings,.the spri~g and summer of 1~42, only 11 natural seedhngs germ1nated in 14 of the 692 natural reproduction ra.ts of the 31 plots.. Only 5 were !\live at the end of the first season. ~1atu.ral re:eroduotion thus was .practi,eally a failure. In first season one or more in 92 seed of spots, germinated. On the bash of seeds planted, germination was 68 percent,. the average of the of the 59 21 15 e.nd height the planted trees are Survival 1943 Former Inches Bear-clover 58 38 34 High brush 47 45 41 5,..1 6.,6 Discussion It is obvious that, in spite o~ a heavy seed crop, natural repro. duotion was practically a ~allure. The ~ailure was probably the result of rodent depredations. Clearing o~ the s~.11 areas very likely provided a very good opportunity ~or rodents to find the large sugar pine seeds,. Site preparation to take full advantage of seed crops should be accom~ panied by thorough rodent control., In the area cleared of high brush, seed spotting ~~s more e~~ec­ tive than planting" In the bear-clover area., however, planting was more effective. This might be explained by the fact that the bear-clover sprouted back so quickly that by the second season it had overtopped the !!Jeedli.ngs. The planted stock, being several inches taller, vYas not so completely dominated. After 3 years very little o~ the high brush species has sprouted back or has grown from seed in the cleared areas. It appears quite probable that the sugar pine from the seeding and planting 'IJ'.rill become established in these be~ore the brush can regain control. The brush cover of bear-clover or high brush was removed. mechanically from 37 unstocked areas in cut-over stands in anticipation of a got').d sugar pine seed crop. In the cleared areas, plots were established to determine whether natural seedlings would result and. to compare the effectiveness of natural reproduction, seed spotting under screens, and planting., In spite of a good seed fall. natural reproduction was a failure; probably because of rodent depredations~ After 3 years. seed spotting was less ef~ective than planting in areas cleared in bear-clover but was more effective than planting in areas cleared in high brush.. A fair pero.entage of the sugar pine from seed and planting survived and grew well through the third season, indicating possibilities of successful establishment before brush regain:s control.,