Figure 3. The relationship between stem water potential (MPa) and shoot growth (cm) for 2018 (square symbol) compared to measurements from 2019 (round symbol) (P <0.01, r = 0.678) for ‘Honeycrisp‘ apple trees on B.9, M.9, G.969, CG.4292, G.210, G.87, CG.5257, G.814, G.890 rootstocks. The lines indicate the best-fit adjusted linear regression for the combined data points.