Aspects for utilizing a seawater fluid to optimize egg-production characteristics are disclosed. In one aspect, a method is provided, which includes identifying a desired optimization, determining a corresponding seawater to non-seawater ratio, and generating a seawater fluid according to the ratio. An egg-cultivation method is also provided, which includes ascertaining a desired optimization, selecting a corresponding seawater to non-seawater ratio, and providing a seawater fluid comprising the ratio to a hen. In another egg-cultivation method, hens are provided with a mixed feed comprising a feed to seawater-mineralized produce ratio selected according to a desired optimization. A method to grow produce is also provided, which includes mineralizing soil with a seawater fluid comprising a seawater to non-seawater ratio corresponding to a preferred optimization. In another aspect, a method to produce feed is disclosed, which includes mixing feed with mineralized produce according to a ratio corresponding to a
