Correct Option
The correct option is (c) 1 and 3 only.
Explanation
Sowing is the process of planting seeds in the soil. The selection of viable seeds and the use of appropriate agricultural implements are critical steps that determine the success of germination and crop yield.Statement 1 is Correct: Damaged seeds often become hollow due to infestation or poor development, making them lighter than healthy seeds. Consequently, when placed in water, damaged seeds float while healthy, viable seeds sink. This physical property is used as a standard method to separate good seeds from damaged ones.
Statement 2 is Incorrect: The traditional tool used for sowing seeds is shaped like a funnel, not a flat blade. In this method, seeds are filled into the funnel and pass down through pipes with sharp ends, which pierce the soil and place the seeds at the required depth.
Statement 3 is Correct: A seed drill is a modern agricultural implement used with tractors. It sows seeds uniformly at equal distances and depths. A primary advantage of the seed drill is that it ensures seeds are covered by soil immediately after sowing, which prevents them from being eaten by birds and reduces water loss.
Key Takeaway: The water floatation test effectively identifies damaged seeds (which float). In sowing technology, the traditional tool is funnel-shaped, whereas the modern seed drill ensures uniform placement and protection from birds.