Weed wars: Strategies for thriving direct-seeded rice fields

Rice holds a vital place in Indian agriculture, serving as the staple food for millions and positioning India as the second-largest rice producer globally, contributing over 20 % to the world’s total rice production. With half the world's population relying on rice as a primary nutritional source, its cultivation is essential. Among the various methods of rice cultivation, direct-seeded rice (DSR) is gaining prominence due to challenges such as labor shortages and rising wages, particularly during peak agricultural seasons. Traditionally, transplanting has been the preferred method; however, DSR offers a viable alternative by addressing these limitations. A major concern in DSR cultivation is weed competition, as weeds aggressively compete with crops for critical resources like light, moisture, nutrients and space, ultimately reducing yields. While manual weeding remains effective, its high labor requirements and associated costs have made it less feasible, especially in large-scale cultivation. Chemical weed management, on the other hand, provides an efficient and less labour-intensive solution for controlling weeds in DSR systems. Wet-seeding is an integral part of DSR, where sprouted seeds are sown into puddled fields. This method offers multiple advantages, including time savings, reduced labour demand, better early establishment and improved water-use efficiency. Wet-seeding can be categorized into aerobic and anaerobic systems. In aerobic wet-DSR, pregerminated seeds are sown on the soil surface, whereas anaerobic wet-DSR involves sowing seeds in puddled soil. This distinction influences the growth environment, with anaerobic systems promoting specific soil conditions. Both methods are notable for conserving labor, energy and time, making wet seeding a sustainable and practical option in modern rice farming.