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.
Purchase bulbs from mail order suppliers, garden center, or other local source. Break bulbs apart at planting time, keeping papery husks on the individual cloves. Plant with tips up, 2 inches deep and 4 to 6 inches apart in rows 15 to 24 inches apart. Plant elephant garlic varieties about 3 inches deep and 8 to 12 inches apart. Mulch heavily after planting to prevent soil heaving - particularly with less-hardy elephant garlic varieties.