The effect of poor drainage on the root distribution of kiwifruit vines

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Abstract
Kiwifruit vines growing in poorly-draining soil on recontoured land had smaller root-systems and markedly fewer structural roots than nearby vines on undisturbed well-draining soil. The vines had been growing for 3 years before it was realised that there was a problem. Occupied rooting volumes, mean root-length densities (cm root/cm3 soil), and root weights (kg/plant) were lower under the kiwifruit vines on the poorly-draining soil. Rainfall data for the region demonstrate how growers could become over-confident about the health of their vines during several years of low or average rainfall. Waterlogging symptoms may only became obvious on a poorly-draining soil after a higher than usual rainfall.

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