Different kinds of formulations:
21-21-21 + TE / 10-50-10 +TE / 10-52-10 / 19-19-19 +1MgO +TE / 10-5-40 +1MgO +TE / 30-10-10 +1MgO +TE / 22-9-9 / 15-5-25 / 15-5-30 / 15-15-15 / 16-16-16 / 24-6-6 / 10-20-10 etc.