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I don't know I just watched a youtube video. thought it's easy to produce so decided to go for hydroponic sorghum

Hello, friend, Can some expert suggest what should be the balance nutrition for 25-liter milking cow ? I mean 1. how much green fodder? 2. How much concentrated feed? 3. How much Hay? If I have 20 kg of hydroponic sorghum per day then what should be the additional requirement?