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.
| 7 Responses. close up of onion growing on the field. From planting to harvest depends on the type and whether they were started from sets (50 to 60 days), seeds (110-125 days), or transplants (70 to 90 days).Harvest when one-forth to one-half of the tops of the onions have fallen down.lanting onions from bulb sets is likely the quickest method for a gardener to establish vigorous and strong onions. Green onions can be harvested when they are around five inches high, the higher they are the stronger the flavor. If you planted from sets or transplants they will be ready to eat in about a month.