Explain the concept of 'broadcasting' in seed sowing. What are its limitations compared to using a seed drill?
Broadcasting is a traditional method of sowing seeds where they are scattered by hand or mechanically over the soil surface. It is a simple and quick method. However, its limitations compared to a seed drill are significant: 1) Uneven distribution: Seeds are scattered randomly, leading to uneven spacing and overcrowding in some areas, while others remain sparse. 2) Variable depth: Seeds may not be sown at the optimal depth, leading to poor germination rates. 3) High seed wastage: Many seeds remain exposed on the surface, making them vulnerable to birds, rodents, and wind erosion. 4) Lower yield: Due to inefficient use of land and resources, and poor plant establishment, overall yield tends to be lower.