1148 
Journal of Agricultural Research 
Vol. XXVIII, No. 11 
Great care should be taken in silvicultural markings to reserve, as seed trees, 
only thrifty individuals which can reasonably be expected to survive until the 
next cut is made and to continue to grow at a profitable rate. Every precaution 
should be taken to avoid injury to advance growth at the time of logging because 
of its supreme importance in regenerating the uneven-aged forests of western 
yellow pine promptly. 
LITERATURE CITED 
(1) Dunning, D. 
1922. RELATION OF CROWN SIZE AND CHARACTER TO RATE OF GROWTH 
AND RESPONSE TO CUTTING IN WESTERN YELLOW PINE. Jour. 
Forestry 20: 379-389. 
1923. SOME RESULTS OF CUTTING IN THE SIERRA FORESTS OF CALIFORNIA. 
U. S. Dept. Agr. Bui. 1176, 26 p., illus. 
(3) Kobstian, C. F. 
1921. EFFECT OF A LATE SPRING FROST UPON FOREST VEGETATION IN THE 
wasatch mountains of utah. Ecology 2: 47-52, illus. 
(4) 
1921. RELATION OF PRECIPITATION TO HEIGHT GROWTH OF FOREST TREE 
saplings. Trans. Utah Acad. Sci. (1918-21) 2: 260-267, 
illus. 
(5) - anc i Baker, F. S. 
1922. IS DOUGLAS FIR REPLACING WESTERN YELLOW PINE IN CENTRAL 
Idaho? Jour. Forestry 20: 755-764. 
(6) -and Long, W. H. 
1922. THE WESTERN YELLOW PINE MISTLETOE: EFFECT ON GROWTH AND 
suggestions for control. U. S. Dept. Agr. Bui. 1112, 36 p., 
illus. 
(7) -and Baker, F. S. 
1924. forest planting in the intermountain region. U. S. Dept. 
Agr. Bui. 1264. 
(8) Munger, T. T. 
1917. western yellow pine in Oregon. U. S. Dept. Agr. Bui. 418, 
48 p., illus. 
(9) Pearson, G. A. 
1923. NATURAL REPRODUCTION OF WESTERN YELLOW PINE IN THE 
southwest. U. S. Dept. Agr. Bui. 1105, 144 p., illus. 
(10) Sparhawk, W. N. 
1918. EFFECT OF GRAZING UPON WESTERN YELLOW PINE REPRODUCTION 
in central idaho. U. S. Dept. Agr. Bui. 738, 31 p., illus. 
(11) Weidman, R. H. 
1920. A STUDY OF WINDFALL LOSS OF WESTERN YELLOW PINE IN SELEC¬ 
TION cuttings fifteen to thirty years old. Jour. Forestry 
18: 616-622. 
