With corn needing nitrogen, and pigs and cattle producing a lot of it, anything that offers a better way to use their waste to fortify crops should intrigue farmers. Two agriculture experts at The Ohio State University have redesigned a metal tractor attachment so that it allows farmers to put manure on a field while crops are emerging.Applying manure to growing crops, which is not widely done in Ohio or nationwide, can boost yields, reduce nutrient losses, and give livestock producers and commercial manure applicators another window of time to unload their waste and enrich their crops.While draglining manure, a process that involves applying manure through a hose that pumps it directly from the livestock facility, is not new to many Ohio farmers, it is rarely used to apply manure on a growing crop.