Potassium influence on soil aggregate stability

ABSTRACT Improving soil aggregate stability (SAS) is important for crop production and environmental protection. Here we aim to quantify the effects of potassium (K) on SAS and to examine SAS as a function of potassium adsorption ratio (PAR) and cation ratio of soil structural stability (CROSS). The soils were treated with the incremental K and analyzed for their aggregate stability, clay dispersion, PAR, and CROSS. The influence of K on SAS, therefore, was tested statistically and fitted functionally. The results showed that K decreased clay dispersion and improved SAS. Also, SAS as a function of PAR fit an inverse exponential regression. Based on the coefficients of determination (R2) of the obtained functions, SAS can be explained by PAR with the accuracy above 94%. Increasing CROSS according to K also caused higher SAS, implying that K is considered as a flocculating inducer for kaolinitic tropical soils.

• Publication year

  2018

• Venue

  Communications in Soil Science and Plant Analysis

• Publication date

  2018-07-23

• Fields of study

  Agricultural and Food Sciences, Environmental Science

• Identifiers
  DOI 10.1080/00103624.2018.1499752
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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