Phase shift is usually measured as phase angle, which is defined as , where T is the period of the function. The vertical shift of the function is defined by D, and indicates the shift along the vertical axis from the mean (rest) value of the function. See more Trigonometry topics.
I am often asked how long it takes quail eggs to hatch. The incubation period for bobwhite quail eggs is 23-24 days. Here is a link to information on incubating bobwhite quail eggs http://www.farmingfriends.com/incubating-bobwhite-quail-eggs/.The incubation period for Coturnix (Japanese) quail eggs is 17 days.sually the hen will keep sitting if she thinks the other eggs are fertile and I have read that the hen can feel movement in the eggs so will keep sitting. Quail eggs take about 17 days to hatch and hen eggs take 21 days.
Reproduction. Quail nest in Louisiana from early May through September with most of the hatching occurring from June to August. Clutch size ranges from 12 to 15 eggs. After 23 days of incubation the chicks hatch and are totally flightless for about two weeks.