The researchers studied how different spacing between rows of wheat plants affects their growth and yield. They found that closer row spacing of 10-15 cm resulted in higher levels of chlorophyll, photosynthesis, and sugars in the leaves, leading to better grain production. Narrower spacing also improved the distribution of nutrients to the grains, increasing the number of ears and overall yield of the wheat plants. This suggests that adjusting row spacing can help farmers grow more wheat efficiently.