exactly is this fertilizer How can we obtain it"An Xuetang stood up and explained, “There are many kinds of fertilizer, such as bean curd residue fertilizer. Bean curd residue is the leftover dregs af... by Yunqi!Yun Qi promised him that as long as he did this, he would be in charge of the entire army camp's kitchen from then on.Not only that, but Yunqi also gave him several silver notes at the time....