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Showing 1 to 10 of 10 for “"EXCHANGEABLE K"”.
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Effect of agronomic practices using organic amendments on selected chemical properties of soils in Chipata and Kasama, Zambia
… tested for soil organic matter (SOM), CEC, pH, exchangeable acidity, total N, available P and exchangeable K. Maize grain yields were also recorded. After two growing seasons, no significant differences (p > 0.05) in SOM were observed among treatments in Chipata. In Kasama SOM significantly (p < …
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Effect of agronomic practices using organic amendments on selected chemical properties of soils in Chipata and Kasama, Zambia
… tested for soil organic matter (SOM), CEC, pH, exchangeable acidity, total N, available P and exchangeable K. Maize grain yields were also recorded. After two growing seasons, no significant differences (p > 0.05) in SOM were observed among treatments in Chipata. In Kasama SOM significantly (p < …
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Nitrogen and Potassium Dynamics of Selected Indiana Soils
… injection of AA dramatically decreased the nonexchangeable K concentration in some soils up to 4.5 cm away from the injection point, but did not significantly affect the exchangeable K concentration in the soil. In the study about effects of moisture on soil test K (STK) levels, we found that …
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Characterization of soil potassium with ion-selective electrodes
… electrodes (ISEs) to determine soil exchangeable potassium (K) in soil suspensions, (2) compare and improve the ISE methods of determining soil potassium Q/I relationships, and (3) characterize the effects of experimental procedures and other factors on the potentiometrically …
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Investigation of the principles of rapid soil tests for available potash and other plant nutrients of Virginia soils: III. selection, development and calibration of rapid chemical soil tests for available potassium, phosphorus, calcium and magnesium
… procedures which approach total measurement of exchangeable K₂O, CaO and MgO, and adsorbed and acid soluble P₂O₅. With certain modifications, Bray's sodium perchlorate solution was the most promising of the extractants tested for measuring total exchangeable K₂O, CaO and MgO. Neither the acetate …
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The effects of biochar and NPK fertilizer on maize performance and selected soil nutrient levels
… and NPK fertilizer had no effect on total N and exchangeable K at all soil depths in 2015/16 and 2016/17 seasons. Biochar had no effect on phosphorus at all soil depths in 2015/16 and at 0-10 cm soil depth in 2016/17 season. The effect of biochar and NPK fertilizer was highly significant …
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Soil potassium level in relation to potassium treatment, season of year and soil moisture level
… content, soil acidity, field-moist and air-dry exchangeable potassium were lower in summer months and higher in winter months, while non-exchangeable potassium test levels were higher in summer months and lower in winter months. Successive extractions of the sum of six non-exchangeable potassium …
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Grape marc biochar as a soil amendment: Potential for improving soil fertility, vine nutrition, and carbon sequestration: A thesis submitted in partial fulfilment of the requirements for the Degree of Master of Science at Lincoln University
… pH, total C (TC), total N (TN), available P, exchangeable K⁺, cation exchange capacity (CEC), water holding capacity (WHC), and aggregate stability. Soil total carbon concentrations increased by 35.4% in the Pallic soil and 23.4% in the Recent soil, while plant-available P concentrations …
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The effect of spent mushroom compost on soil conditions and plant growth
… total-P, phosphate extractable-SO₄²⁻-S, total-S, exchangeable-K, exchangeable-Ca, exchangeable-Mg, total exchangeable bases, cation exchange capacity and base saturation. The soil electrical conductivity was also increased following the application of SMC. Applications of SMC produced a rapid but …
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ΙΣΟΡΡΟΠΙΑ ΑΝΤΑΛΛΑΞΙΜΩΝ-ΔΙΑΛΥΤΩΝ ΜΟΡΦΩΝ ΚΑΛΙΟΥ-ΜΑΓΝΗΣΙΟΥ ΣΤΑ ΕΔΑΦΗ
THE EXCHANGE CHARACTERISTICS OF THE PAIR POTASSIUM-MAGNESIUM WAS STUDIED IN THREE REPRESENTATIVE RED MEDITERRANEAN SOILS USING THERMODYNAMIC PRINCIPLES. THE EXCHANGE REACTION WAS STUDIED IN BOTH DIRECTIONS IN AN ATTEMPT TO INVESTIGATE ITS REVERSIBILITY AND TO RELATE IT WITH THE MINERALOGICAL …