. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 104 BULLETIN 1105, U. S. DEPARTMENT OF AGRICULTURE. for study under a great variety of conditions. At the same time an average drought through June and the first half of July, 1920, resulted in heavy thinning, thus bringing about the desired differ- entiation between various sites. The results of the 1920 seedling counts under different methods of brush disposal are given in Table 25 and Figure 14. With the exception of groups 6, 7, and 8, seedlings are strikingly less abun- dant in brush than in open places. These thr
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 104 BULLETIN 1105, U. S. DEPARTMENT OF AGRICULTURE. for study under a great variety of conditions. At the same time an average drought through June and the first half of July, 1920, resulted in heavy thinning, thus bringing about the desired differ- entiation between various sites. The results of the 1920 seedling counts under different methods of brush disposal are given in Table 25 and Figure 14. With the exception of groups 6, 7, and 8, seedlings are strikingly less abun- dant in brush than in open places. These three groups of plots â¦- 60 0) .- _ >â ~ V. « o 0) Depth 6 inches LEGEND No brush _â__i Between branches Under branches ⦠Intsrpolated for*no brush-. i>:^ Precipirarion (inches) / ⢠⢠c # ⢠* ⢠⢠* ⢠⢠⢠« * ⢠MAY JUNE JULV AUGUST SEPX OCT Pig. 14.â^Available soil moisture, brush, experiment. Port Valley, 1920. are on closely grazed or overgrazed areas. Under prevailing range conditions, the herbaceous vegetation, especially bunch grass, is taller and more luxuriant among tree tops (Pis. XVI, Fig. 2, XVIII, Fig. 2, and XIX, Fig. 1), in the edges of brush piles, and in scattered brush than in open places. Exceptions to this rule occur where the ground cover was largely destroyed by grazing or other causes dur- ing or prior to logging, as in Groups 6,7, and 8, Table 25 (PL XVI, Fig. 1), or where the branches fell in such deep masses as com- pletely to kill out the original vegetation. Even in the latter case, however, the grasses often develop very strongly in the edges of the brush Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.
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