this is a fertilizer vs land purchase. with fertilizer costs at 320 A ton. if you have 100 acres and put the recommended 200 lbs to the acre that is 10 tons x $320 = $3200x 3 times a year= $9600 plus labor/fuel. over ten years that is close to $100,000. that would buy an additional 30 to 50 acres($2000-$4000 an acre) average acre price. Most people won't pay off there land in ten years so maybe you finance a little longer and buy more or less depending on land cost. My question is would the additional land feed what the fertilizer would have added in extra grass. the figures are based on just 100 acres. if you have 500 acres that would be 5 times that.