Nutrition Certifications Van Iperen WS NPKs are top high-quality blends constructed from the purest raw resources, with restricted caking sensitivity and with high amount EDTA-chelated micro-nutrients for fertigation or foliar software.???? ??? ?? ???? ????? ????? ??? ???? ??? ?? ? ???? ????? ??? ?? ????? ???? ??? ?? ? ??? ????? ?? ??? ?? ???? ?? ?