Intensive Harvesting and Site Preparation Decrease Soil Nitrogen Availability in Young Plantations
Intensive harvesting and site preparation remove large amounts of nitrogen and other nutrients. The effects of these removals on the nitrogen-supplying power of remaining soil were examined in five 1- to 5-year-old loblolly pine (Pinus taeda) plantation trials. Whole-tree harvest and shear-pile-disk site preparation reduced nitrogen availability relative to stem-only harvest and chop-and-burn preparation. Net nitrogen mineralization during 30-day incubation averaged 7.8 g N/g of soil in stem-only/chopped plots in the two youngest sites; the corresponding value in the whole-tree/ shear-pile-disk sites was 4.2 g N/g of soil. Herbicide applications were associated with increased nitrogen availability up to 3 years after the last application.¹
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Document Type: Journal Article
Affiliations: Research scientist, Ames Research Center, NASA, Moffett Field, California 94305
Publication date: 1985-05-01
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