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.
Fertilizing onions is. Fertilizing onions is critical to success. Before planting, work 4 to 6 inches of well-composted organic matter and an all-purpose fertilizer (16-16-8) into the soil to a depth of 6-8 inches. Then, 4 to 6 weeks later, sidedress onions with nitrogen fertilizer (21-0-0) as directed.