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Winter Cover Crops Increase Readily Decomposable Soil Carbon, but Compost Drives Total Soil Carbon During Eight Years of Intensive, Organic Vegetable Production in California

Compost and cover crops are often used to add organic matter to the soil in frequently tilled, intensive organic vegetable production systems. The objectives of this study were to quantify C inputs, and to assess the effects of urban yard-waste compost, winter cover crop frequency and cover crop type on soil organic carbon and labile C stocks during eight years of intensive, organic production that usually included two vegetable crops per year in a long-term systems study in California.

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