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Growth and Complexity of White Clover Stolons in Response to Biotic and Abiotic Stress

USDA-ARS Pasture Systems and Watershed Management Research Unit, Curtin Road, University Park, PA 16802-3702

View larger version (33K): [in a new window]   Fig. 1. Soil moisture to the 15-cm depth (1999 and 2000) and 60-cm depth (2000) recorded at the experimental site in Berks County, PA.

View larger version (25K): [in a new window]   Fig. 2. Changes in the number, length, and mass of primary stolons and first- and second-order stolon branches of white clover during 1999 and 2000. Data are untransformed means. The transformed means along with the SE are in Table A1.

View larger version (29K): [in a new window]   Fig. 3. Density of white clover nodes on primary stolons and branches and the percentage of nodes with roots during 1999 and 2000. Data are untransformed means. The transformed means along with the SE are in Table A2.

View larger version (23K): [in a new window]   Fig. 4. Density of white clover leaves on primary stolons and first-order branches in 1999 and 2000. Data are untransformed means. The transformed means along with the SE are in Table A3.

View larger version (21K): [in a new window]   Fig. 5. Canopy height of orchardgrass and white clover during 1999 and 2000. These data did not require transformation.

View larger version (20K): [in a new window]   Fig. 6. Density of orchardgrass tillers and dry matter yield of orchardgrass and white clover. White clover yield is the total of leaf and stolon. Data are untransformed means. The transformed means along with the SE are in Table A4.

View larger version (26K): [in a new window]   Fig. 7. Blue weevil larval damage to white clover stolons estimated by the percentage of stolons infested and the proportion of stolon length damaged by weevil larvae tunneling inside the stolon. Data are untransformed means. The transformed means along with the SE are in Table A5.

View larger version (22K): [in a new window]   Fig. 8. Sitona larval damage to white clover roots estimated by the percentage of stolons infested and the proportion of root damaged by Sitona feeding. Data are untransformed means. The transformed means along with the SE are in Table A5.