This product is made from high purity raw materials，the formula is scientific and acceptable.It is far from only full of NPK, which can be important for crops,and also adds magnesium and sulfur.immediately after application,it can promote the absorption and utilization of assorted growth components of crops,successfully reduce the deficiency disorder https://remingtoncvnex.ampedpages.com/details-fiction-and-npk-12-12-17-2-b-te-for-crop-rotation-59775444