Trying to dig a 12 to 30 foot long trench manually will be a nightmare. My recommendation is to bite the bullet and rent a trencher to do the work for you. Even at 12 inches, your work is cut out for you, but 36 inches is really deep.
After the two-month incubation period, the turtle hatchlings all dig out of their nest at the same time, a process that can take several days. As a group, they then leave their nest at night and head directly for the sea. This first trek imprints their home beach into the hatchlings.
So, how long does it take for fertilized chicken eggs to hatch? The answer to that is 21 days exactly, although you need to bear in mind that this can vary, depending on a number of circumstances.f for some reason the temperature has dropped below the correct temperature on a few occasions, you could find some of your eggs only hatching on day 22, 23, or even on day 24 or 25. Whereas fertilized chicken eggs usually take exactly 21 days to hatch, most duck eggs take 28 days, apart from Muscovy ducks.