Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings - Radwan, M. A.,; Shumway, John S.; DeBell, Dean S.; Pacific Northwest Forest and Range Experiment Station (Portland, Or.); United States. Forest Service. (Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1979)
Cover title. --- Issued Oct. 1979.
Keywords: Douglas fir; Effect of manganese on; Effect of nitrogen on; Fertilization; Forest soils; Nitrogen fertilizers; Plants