... Moisture 2.5% MAX NPK 16-16-16 Compound fertilizer, Moisture 2.0MAX Granular 2.0-4mmNPK fertilizerFertilizer is ... secondary elements are calcium, sulfur, magnesium, and other elements are boron, manganese, iron, zinc, copper and molybdenum. Fertilizers enhance ... sometimes modified with superphosphate to make it a better balanced fertilizer. Compost, decayed to a relatively stable, amorphous state, ...