The study looked at how different ways of planting corn at different densities affect how well the plants can make food through photosynthesis. They found that planting corn closer together in rows with double plants in a twin-row arrangement led to higher photosynthesis and better yield compared to traditional single-row planting. As plant density increased, the efficiency of photosynthesis decreased slightly, but the twin-row planting pattern with double plants maintained better photosynthetic productivity and higher yield. This suggests that planting corn in a specific way at the right density can help improve crop productivity during the grain filling stage.