बीज बोने से पहले किसान मिट्टी को खोदकर, ढीला करके और पलटकर अपने खेतों को तैयार करते हैं ताकि वह नरम हो जाए। इस प्रक्रिया को कहा जाता है:

Choose the correct option to fill in the blanks: (i) Urea : Inorganic fertilizer :: Cow dung : ________ (ii) Gum : Natural adhesive :: ________ : Artificial adhesive

A farmer finds that legume seeds which he had stored for sowing next season have been attacked by insects. Which of the following methods would you suggest to him to separate healthy seeds from infected seeds?