What is the desired outcome of stopping the flow at the right time in border irrigation?

In border irrigation, the desired outcome of stopping the flow at the right time is to enhance the uniform distribution of water across the field. This method relies on gravity to move water across a strip of land bordered by small earth ridges, and achieving uniform distribution is crucial for ensuring that all parts of the field receive adequate moisture.

When the flow is stopped at the optimal moment, it prevents excess water from pooling in low areas or running off the edges, which can lead to uneven moisture levels. This uniformity not only supports consistent crop growth but also prevents problems associated with over-irrigation, such as soil erosion or runoff, which could affect surrounding ecosystems.

While aspects like minimizing water wastage and promoting crop growth are important, they are secondary benefits that arise from achieving the primary goal of uniform water distribution. Proper timing in stopping the flow ensures that the total volume of water applied meets the crop's water needs efficiently, reducing the chances of wastage.