Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings.

M. A. Radwan; John S. Shumway; Dean S. DeBell

Treesearch

Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings.

Informally Refereed

Authors:

M. A. Radwan, John S. Shumway, Dean S. DeBell

Year:

1979

Type:

Research Paper

Station:

Pacific Northwest Research Station

Source:

Res. Pap. PNW-RP-265. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

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Abstract

Effects of manganese (Mn) on Douglas-fir grown in soil, with and without urea, and in nutrient solution were investigated. In addition, Mn sorption by forest soils was evaluated. Results show that Douglas-fir does not respond to added Mn and is quite tolerant to high Mn levels. Moreover, Mn sorption by soils is high. It is doubtful that Mn toxicity is of practical importance to production of Douglas-fir under forest conditions.

Keywords

soil manganese, nitrogen fertilizer response, seedling growth, Douglas-fir, Pseudotsuga menziesii

Citation

Radwan, M. A.; Shumway, John S.; DeBell, Dean S. 1979. Effects of manganese and manganese-nitrogen applications on growth and nutrition of Douglas-fir seedlings. Res. Pap. PNW-RP-265. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p