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Comparison of Organic and Chemical Soil Amendments Used in the Reforestation of a Harsh Sierra Nevada Site by R. F. Walker is a Environmental Science article available to read on EtoBox.

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**Abstract** A comparison of a composted organic amendment, a controlled‐release fertilizer, and induced mycorrhizal inoculation as affecting the establishment and nutrition of bareroot Jeffrey pine (__Pinus jeffreyi__ Grev. & Balf.) was conducted on a Sierra Nevada surface mine. The soil amendments were applied at outplanting to the backfill of augered planting holes, with a low rate of 8 g and a high rate of 16 g per seedling for the fertilizer, Gromax 21‐6‐2 + Minors, whereas a single rate of 2.0 L was used for organic matter. Colonization by __Pisolithus tinctorius__ (Pers.) Coker & Couch was induced by coating the root systems with basidiospores suspended in a gel carrier. The organic amendment especially, but also mycorrhizal inoculation, caused substantial seedling mortality, whereas survival was unaffected by controlled‐release fertilization. Gromax applied at the high rate produced a 74% increase in shoot volume after three growing seasons, whereas the organic amendment reduced volume by 28%. Growth was unaffected by mycorrhizal treatment. The growth response to the 16‐g Gromax application probably reflected enhanced N, P, and K nutrition and decreased concentrations of po

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Author

R. F. Walker

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 1061-2971)

Published

2003

Language

EN

Field

Environmental Science (Physical Sciences)