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; Range Experiment Station (Portland, Or.); United States. Forest Service. (Portland, Or, Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, 1979, 1979)
https://www.biodiversitylibrary.org/bibliography/94198
Keywords: Douglas fir|Effect of manganese on|Effect of nitrogen on|Fertilization|Forest soils|Nitrogen fertilizers|Plants