ONR CEN/TS 17403-2021
肥料 固體脲甲醛和亞甲基脲緩釋肥料中冷水不溶性氮和熱水不溶性氮的測定以及營養(yǎng)聚合物在磷酸鹽緩沖溶液中溶解度的測定
Fertilizers - Determination of cold water insoluble nitrogen and hot water insoluble nitrogen in solid urea formaldehyde and methylene urea slow-release fertilizers and determination of the solubility of nutrient polymers in phosphate buffer solution with