Study region: The hilly area of Shandong Peninsula is a pivotal apple-producing region in China. However. the precise water sources utilized by the apple trees for transpiration remain poorly understood in this region. Study focus: Here we quantify the water sources used by apple trees in this area using stable isotopic tracing methods. https://www.nacrack.com/quick-save-TRAILMASTER-CHALLENGER-200X-UTV-2-SEATER-super-grab/