TECHNICAL SPECIFICATIONTECHNICAL SPECIFICATIONITEMSTANDARDAppearancePowderTotal Nitrogen , %≥ 21.0Moisture, %≤ 1.0Free acid(as H2SO4) %≤ 0.2Water Insolubles,%≤ 0.2Character: A kind of good nitrogen source, for its fully solubility character, widely use for irrigation purpose, suitable for normal soil condition and common crops, promote growth increase yield. Improve fruits quality, use as base, ...