A study tested different ways to control weeds in rice fields without using chemicals. They tried methods like hand weeding, soil solarisation, brown manuring, and organic mulching. Hand weeding at specific times was the most effective, reducing weed growth and increasing rice yield. Line sowing also helped to control weeds and improve rice yield. Overall, non-chemical weed management techniques like hand weeding and line sowing can help farmers grow more rice without harmful chemicals.