Apart from the punctuation, the first is fine. 'The children are very hungry. Feed them, please.' Hungry doesn't work in the other situations, I'm afraid. For the second, perhaps you could say 'I'm very keen to read this book' or 'I can't wait to read this book'. Or if you are already reading it, you could say something like 'I can't stop reading this book' or 'I can't put this book down.' It's not clear what you mean by the third. Do you mean that nothing will grow in the soil? Perhaps that it's poor soil? Or that you water it, and all the water disappears?

Here is how I would rewrite these sentences: The children are very hungry. Feed them, please. I hunger to read this book. The soil is starved. Nothing will grow in it. The last two are rather poetic, so you may see some strange looks. Don't let that stop you from experimenting with language, though. :)