Average surface area (cm²), volume of root (%), number of laterals and lateral angle (°) of vetch root systems.

(A) Average surface area of vetch root (cm²) (B) Average volume of vetch root as a percentage of the soil volumes, (C) Average number of lateral roots observed protruding from the taproot into the soil volumes. (D) Average angle of lateral roots protruding from taproot into the soil volumes. For all graphs data is presented for both the compacted and uncompacted zones over two time periods Bars denote means, whiskers pooled SE.