Potassium availability and soil extraction tests in agricultural soils with low exchangeable potassium content

Potentiometric multi-syringe flow of exchangeable potassium in soils with in-line extraction

A multi-syringe flow injection system for the potentiometric determination of exchangeable potassium in soil samples is proposed. Firstly, a manifold was devised to allow determination in soil extracts prepared off-line. It was possible to analyze samples prepared in extractants with different composition (Mehlich or Morgan) without physical or chemical modification of the manifold. A linear dy...

Predicting soil potassium content

A linear mixed model, with non-stationary mean and covariance, for soil potassium based on gamma radiometry K. A. Haskard, B. G. Rawlins, and R. M. Lark Rothamsted Research, Harpenden, Hertfordshire, AL5 2JQ, UK British Geological Survey, Keyworth, Nottingham NG12 5GG, UK Received: 29 January 2010 – Accepted: 2 March 2010 – Published: 16 March 2010 Correspondence to: R. M. Lark (murray.lark@bbs...

The exchangeable potassium content of normal women.

Relationships between Available and Exchangeable Potassium Content and Other Soil Properties

Canonical correlation analysis was applied to the study of interrelationships between two multivariate datasets, one consisting of available and exchangeable potassium content, and second consisting of pH, hydrolytic acidity, and content of exchangeable aluminum, calcium and magnesium, available phosphorus, and total nitrogen. An attempt has been made to provide an overall pattern of interrelat...

Potassium reserves in soils with arid and semi-arid climate in southern Iran: a perspective based on potassium fixation

ABSTRACT- The present research was conducted to study K forms and fixation in soils of southern Iran (Hormozgan Province) with aridic and aridic-ustic regimes and to address the relations between soil mineralogy and potassium forms. Thirteen surface soil samples (0-25 cm) were collected from different regions and analyzed in laboratory. Illite and feldspar and mica are the major clay and soil m...