An organ pipe is a sound-producing element of the pipe organ that resonates at a specific pitch when pressurized air (commonly referred to as wind) is driven through it. Each pipe is tuned to a specific note of the musical scale. A set of organ pipes of similar timbre tuned to a scale is known as a rank or a stop.
1 In general, cotton grows quicker as the average temperature rises and the longer and hotter the season, the greater the yield. 2  The growing season from planting to picking lasts approximately six months, as outlined below.
In the subtropics with summer rainfall the crop is grown under irrigation in the winter months. In the subtropics with winter rainfall it is grown under supplemental irrigation. The length of the total growing period of spring wheat ranges from 100 to 130 days while winter wheat needs about 180 to 250 days to mature. Daylength and temperature requirements are key factors in variety selection.