To make the spice rub, add the turmeric powder, garlic powder, onion powder, black pepper, and kosher salt into a small bowl and mix it evenly. Set aside.
Clean the chicken thouroughly, by removing excess fat around and waste in and around the cavity. Use 1 tbsp of salt, and sprinkle it liberally all over the surface of the chicken. Rub vigorously, making sure to rub off the film, debris, and feathers from the chicken.
Leave the chicken to dry-brine for about 10-15 minutes in a mixing bowl, or make a quick brine for a juicier (higher sodium) result. After that rinse the bird and pat it dry.
Preheat your oven to 350F.
Add half spice rub onto the chicken, and drizzle half of the olive oil on the breast side of the chicken. Rub the spices in. Then flip the chicken and add the other half of the spice rub and olive oil to the other side. Continue massaging all of the spices onto the skin and cavity of the bird. If you have a string, truss the chicken. If not, it's not a big deal.
Use a roasting pan, lined with aluminum foil or parchment paper. This is for ease of clean up, as the lining will catch all the drippings. Place the poultry on a roaster rack, breast side up.
When the oven reaches 350F temperature, move the roasting pan into the oven, and bake for 1 hour. Half way through, baste the chicken in the drippings to prevent the skin from drying out.
At the 1 hour mark, remove the tray, baste the chicken with a brush, and flip the chicken so that the back side faces up. Increase the temperature to 375F and bake for another 15 minutes, or until the internal temperature of the bird reaches 165F.
Remove the bird from the oven, and rest for 20 minutes before carving.