A VBA-Based Field Water Balance Model for Efficient Irrigation Water Management of Corn (Zea mays L.)

A field water balance model for efficient irrigation management of corn was developed using Excel VBA. The consists five sub-components or modules, namely, (1) a plant subcomponent, (2) an effective rainfall (3) evapotranspiration (4) soil dynamics subcomponent the modeling flow into and within layers, (5) estimation required amount timing irrigation. calibrated validated observed data from experiments results showed reasonably good agreement between simulated moisture values (MAE = 5.76 mm to 12.00 mm, RMSE 6.83 13.12 NRMSE 0.102 0.196, NSE 0.37 0.90). simulations emphasized that significant savings can be achieved when is properly accounted in managing field, frequency occurrences as important magnitude received by crops. wide-ranging user-friendliness simplicity this study pave way eliminating barriers which cause farmers resist advancements their farming practices easily used not only researchers scientists but also farmers, especially those with basic knowledge spreadsheets.