%0 Journal Article %T Pressurized‐Wall Minirhizotron for Field Observation of Root Growth Dynamics %A Merrill, Stephen D. %J Agronomy Journal %V 84 %N 4 %P 755-758 %@ 0002-1962 %D 1992-07-01 %I Wiley Subscription Services, Inc., A Wiley Company %~ DeepDyve