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- W2405704518 abstract "Summary The effect of three ground covers [alfafa (Medicago sativa), Dutch white clover (Trifolium repens) and perennial rye (Lolium perenne) on soil fertility, tree morphology, and tree nutrient status in a Fraser fir-cover crop intercropping system was investigated to assess the impacts of cover crop species and manage ment practice on the sustainability of the cropping system. Ground cover were mowed every 21 days and returned to the ground as green mulch. Parameters monitored included soil moisture, soil organic carbon and nitrogen, soil mineral nitrogen, cover crop bio mass and nutrient content, and tree morphological and nutrient characteristics. Results obtained indi cated that the species selection affected the amount of green manure produced and its total nitrogen and phosphorus content. Soil organic carbon and nitrogen were stable in the upper soil profile due to the rela tively small quantity added with the cropping system compared to the total stock of soil C and N. Mineral ni trogen decreased over the season due to the synchrony of cover crop decomposition, mineralization and nutri ent uptake by trees in the upper profile. Species selec tion and management practices did not affect tree rel ative height growth and 100-needles weight, but man agement practices affected relative diameter growth, indicating competition for soil moisture. Tree foliar nutrient concentrations were not significantly affected by cover species, but were much lower in some of the management practices, suggesting competition for nu trients. We conclude that careful management should be used to capitalize on cover crop benefits and avoid competition for soil nutrients and moisture." @default.
- W2405704518 created "2016-06-24" @default.
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- W2405704518 date "2010-01-01" @default.
- W2405704518 modified "2023-09-27" @default.
- W2405704518 title "Ground Covers in Fraser Fir (Abies fraseri (Pursh) Poir.) Production Systems: Effects on Soil Fertility, Tree Morphology and Foliar" @default.
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