Think of the soil profile as a fuel tank. Rainfall tops it up. Vines, weeds, and cover crops draw it down. Without data you can only guess how full the tank really is, or which parts of it the vines are using. With sensors you can see how deep rain infiltrates, how quickly layers dry, and when reserves are running low. The result is better-timed decisions: when to work the soil, how to manage cover crops, what canopy adjustments to make, and even how to plan harvest.