. Seven-year response of 35-year-old Douglas-fir to nitrogen fertilizer. Trees Growth; Forest soils Fertilization; Nitrogen fertilizers. YEARS AFTER TREATMENT. 1964 1965 1966 1967 1968 1969 420 N 280 N 140 N 1970 YEARS AFTER TREATMENT Figure 7.—Trends of gross total volume growth and estimated rainfall during the growing season: Top, Growth adjusted for differences in initial volume, total stand in axis; bottom, percent gain. 14. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust
. Seven-year response of 35-year-old Douglas-fir to nitrogen fertilizer. Trees Growth; Forest soils Fertilization; Nitrogen fertilizers. YEARS AFTER TREATMENT. 1964 1965 1966 1967 1968 1969 420 N 280 N 140 N 1970 YEARS AFTER TREATMENT Figure 7.—Trends of gross total volume growth and estimated rainfall during the growing season: Top, Growth adjusted for differences in initial volume, total stand in axis; bottom, percent gain. 14. 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 Miller, Richard E. cn; Pienaar, Leon V. (Leon Visser), 1936-; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). Portland, Or. : Pacific Northwest Forest and Range Experiment Station, U. S. Dept. of Agriculture, Forest Service
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