Air column: space within the percussion instrument that determines the pitch. Percussion: sounds produced by striking the instrument with a mallet or stick, or striking one instrument against another. 2. Review the process of forming a hypothesis and making a prediction.
Dig short, shallow rows. The rows should be no more than 1/2 inch (1.5 centimeters) deep and spaced 4 inches (10 centimeters) to 6 inches (15 centimeters) apart. 3. Drop the seeds into the rows. Space the seeds approximately 1 inch (25 millimeters) apart in order to allow the onions enough room to grow and mature.
1 Plant onions as soon as the ground can be worked in the spring, usually late March or April. 2  Make sure temperature doesnât go below 20 degrees F. 3  For sets or transplants, plant the smaller sets 1 inch deep, with 4 to 5 inches between each plant and in rows 12 to 18 inches apart.bout growing conditions and fertilizer, you wonât be able to grow large onions without the proper amount if nutrients and regular, even moisture. I would suggest 10-15-10 applied at 3 to 4 week intervals. If your soil is poor, you may have to fertilize every 2 weeks.