The influence of cutting cycle and plant spacing on carbon biomas and soil were studied at Tully, New York. Willow clone SV1 was planted in 6.0×6.0m plots at three spacing, 0.3×0.3, 0.3×0.9 and 0.6×1.1m and harvested annually, biennially and triennialy. All plots were fertilized and irrigated. Among all treatment combinations, the greates average annual aboveground carbon accumulation (13.6t ha[-1] yr[-1]) occured in plants harvested triennially was significantly greater than in annually harvested plots (but there was no significant difference between annually and biennially harvested plots). Aboveground C accumulation was not effected by plant spacing provably caused by competition among the plants at thes dence spacings. Soil C content was not effected by harvest cycle or plant spacing.
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