The researchers studied how different planting dates affect the growth and yield of wheat in Bangladesh. They planted wheat on five different dates and found that wheat planted on November 25 grew the tallest and produced the most grain and straw. This crop also had the highest harvest index, meaning it used resources efficiently. Wheat planted too early or too late did not perform as well. Overall, planting wheat on November 25 resulted in the best growth and yield in the charland ecosystem of Bangladesh.