土壤氨氮一般多少 标准查询与下载
共找到 150 条与 土壤氨氮一般多少 相关的标准，共 10 页
Determination of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in soil by gas phase molecular absorption spectrometry
本标准规定了测定土壤中氨氮、亚硝酸盐氮、硝酸盐氮的氯化钾溶液提取-分光光度法。 本标准适用于土壤中氨氮、亚硝酸盐氮、硝酸盐氮的测定。 当样品量为40.0 g时，本方法测定土壤中氨氮、亚硝酸盐氮、硝酸盐氮的检出限分别为0.10 mg/kg、0.15 mg/kg、0.25 mg/kg,测定下限分别
Soil.Determination of ammonium, nitrite and nitrate by extraction with potassium chloride solution-spectrophotometric methods
本标准由河北省农业厅提出。 本标准起草单位:河北省土壤肥料总站。 本标准主要起草人:段霄燕、杨瑞让、吕英华、张晓峰、谢红、刘晓丽、赵立。本标准规定了土壤速效氮测定的方法原理、步骤、结果计算。 本标准适用于测定省内各类土壤速效氮含量
Soil Available Nitrogen Determination
本部分规定了使用自动定氮仪测定土壤全氮的方法。 本部分适用于土壤全氮含量的测定
Soil testing.Part 24:Determination of total nitrogen in soil.Automatic kjeldahl apparatus method
Soil quality.General requirements for soil reclamation
本标准规定了土壤碱解氮的测定方法。 本标准适用于各类土壤碱解氮的测定
Determination of soil alkaline nitrogen
Soils. Field testings. General
Determination of cracked nitrogen in soil
Prezentul standard stabile?te metodele de determinare a con?inutului de azot organic ?i azot amoniacal din sol ?i anume : — metoda Kjeldahl
SOILS Nitrogen content determination
Determination of forest soil nitrogen
The determinanation of ammonium nitrogen in soil
The determinanation of nitrate nitrogen in soil
Schválenie ST SEV 4469-84 doporu?ilo Ministerstvo pol'nohospodárstva a v??ivy SSR. Spracovatel a oborové normaliza?ně st?edisko: V?skumn? ústav p
Protection of nature. Soils. Methods for determination of soil pollutions. General requirements
Prezentul standard stabile?te principiile generale privind cercetarea terenului de fundare pentru ob?inerea de date specifice necesare proiect?rii ?i
Foundation soil RESEARCH GENERAL PRINCIPLES
Soils. General requirements for the fulfilment of analyses
