If the manure is completely dry that is fine. Commercial organic fertilizers, which any good nursery will have, are not like chemical fertilizers in any shape or form. Chemical fertilizers are time sensitive and amount sensitive, meaning you have to put out at a specific time and in a specified rate of application. With organic fertilizers this is not applicable. You can put it out at any time and the application rate really doesn't exist. You won't burn anything except a hole in your wallet by using more then you need. I am not sure what brands of organic fertilizers are available in the NE but I think Espoma is. If you put out fertilizer now and then in the spring apply it again with a thin layer of compost or your dried manure you will have a fantastic and healthy turf