An experiment was done to find out the long and short term impacts liquid hog manure had on soils compared to  manure biodigestate that is produced from biogas production. Three amounts of hog manure (1,500, 3,000 and 6,000 gallons per acre) were applied along with three rates of urea: 50, 100 and 200 lbs N/acre. Assessments of grain and straw yield, nutrient concentrations, soil nutrients and properties were made on plant and soil samples collected every three years to determine how manure applications affected crop growth and soil properties. There was little difference in crop yields between applying traditional liquid hog manure and biodigestate. It was found that applying 3000 gallons per acre produced the best yields without creating nutrient excretion. When assessing the soils it was found that excess manure helped with N levels after harvest. Also soil salinity was only effected when greater than 4000 gallons were applied. Application of swine manure at rates of 3000-4000 gallons over three years had little impact on soil properties like pH, salinity and organic carbon compared to the urea fertilized treatments and the unfertilized control. In the long-term (>10 yrs) liquid swine manure trials, application rates of 3,000 – 4,000 gallons per acre every year gave near optimal yields for the crops examined (oats, canola, barley) and were not associated with any loading of nitrate or phosphate in the soil.