Johan grows mirlitons Cajun for Chayote squash in his o$100$x$100$ foot garden. He then sells the crop at the local farmers' market. Two summers ago, he was able to produce and sell $1200$ pounds of mirlitons. Last summer, he tried a new fertilizer that promised a $50\%$ increase in yield. He harvested $1900$ pounds. Did the fertilizer contribute to the productivity of Johan$$s farm?