- Soil total potassium content, soil available phosphorus, soil total potassium content and soil available potassium, Their variation is not obvious. - 而土壤全磷、土壤全钾、土壤有效磷、土壤有效钾随着土壤深度的增加,其变化规律不明显。 
- Available potassium and slow-released potassium contents were decreased, and total potassium content was changed insignificantly in the soil of mono-application of nitrogen fertilizer. - 单施氮肥的土壤,速效钾、缓效钾含量均降低,全钾含量变化不明显。 
- Organo mineral compound fertilizers are digested with sulfuric acid hydrogen peroxide and nitric acid perchloric acid respectively and then their total potassium content is determined. - 用硫酸—过氧化氢和硝酸—高氯酸分别对有机—无机复混肥料进行消化处理,然后进行总钾含量的测定。