A Study of the Quantity/Intensity Relationships of Potassium in Some Calcareous Soils of Iran

Jalali, Mohsen

doi:10.1080/15324980701236382

Cited by 32 publications

(14 citation statements)

References 24 publications

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“…Observations on the change in free energy of exchange (DG) indicate that 80% of the farm soils and 67% of the greenhouse soils were K sufficient. This observation agrees with the findings of Roy et al (1991); Evangelou et al (1994); Jalali (2007). They reported that soils with DG greater than 3,500 kcal for the replacement of Ca and Mg with K are K deficient.…”

Section: Quantity/intensity Parameterssupporting

confidence: 94%

“…This may be due to the relatively high variation in chemical and physical properties of the studied soils. Jalali (2007) reported a positive relationship between PBC and clay content of some Iranian soils. For the field soils, all the K forms were strongly correlated with soybean grain yield, however, soil available K, exchangeable K ?…”

Section: Correlation and Regression Among Soil And Agronomic Parametersmentioning

confidence: 95%

“…Similar results were observed by Adetunji and Adepetu (1993), on some Nigerian soils. The Regression analyses show that more than 60% of the labile K is determined by the amount of clay in the soil, variability in clay mineralogy has been reported as a major determinant of K chemistry in the soil (Officer et al 2006;Jalali 2007;Schindler et al 2005). The equilibrium activity ratio can also be 76 and 99% predicted by the clay content and ECEC, respectively.…”

Section: Correlation and Regression Among Soil And Agronomic Parametersmentioning

confidence: 95%

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Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Taiwo¹,

Adetunji

Azeez

et al. 2009

Nutr Cycl Agroecosyst

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Experiments were conducted in the laboratory, greenhouse and on farmers' fields to determine, the potassium (K) supplying capacity of some soils in Ogun State, Nigeria, using equilibrium parameters as measured by quantity, intensity and activity indices. The result showed that the potassium status of the soils varied widely. Total K varied from 14.2 to 104 cmol kg -1 in the green house soils and 46.05 to 89.

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Section: Quantity/intensity Parameterssupporting

confidence: 94%

Section: Correlation and Regression Among Soil And Agronomic Parametersmentioning

confidence: 95%

Section: Correlation and Regression Among Soil And Agronomic Parametersmentioning

confidence: 95%

See 1 more Smart Citation

Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Taiwo¹,

Adetunji

Azeez

et al. 2009

Nutr Cycl Agroecosyst

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“…According to Jalali (2007), mica, illite, vermicoulite, and kaolinite are the main constituents of the soil of the studied area. Silica release is accompanied by the release of K + and HCO − 3 in a 2:1:1 ratio (Garcia et al 2001):…”

Section: The Origin Of Solutesmentioning

confidence: 99%

Groundwater geochemistry in the Alisadr, Hamadan, western Iran

Jalali

2009

Environ Monit Assess

Self Cite

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The chemical composition of 59 well water samples throughout the Alisadr area, Hamadan, western Iran was determined in order to describe the background ion concentration and to identify the major hydrogeochemical processes that control the observed groundwater chemistry. The hydrochemical types, Ca-HCO(3), Ca-SO(4), dominate the largest part of the groundwater followed by water types Ca-Cl and Mg-HCO(3). Total hardness indicated that 30% of groundwater samples fell in the very hard water category. Ninety-seven percent of the water samples showed nitrate (NO3-) concentrations above the human affected value (13 mg l(-1) NO3-), while 15% exceeded the maximum acceptable level (50 mg l(-1) NO3-) according to WHO regulations. With respect to sodium adsorption ratio, the groundwater can be used for irrigation on almost all soils with little danger of the developing harmful levels of exchangeable Na(+). But with respect to electrical conductivity, the water quality for irrigation was low to medium, providing the necessary drainage to avoid the buildup of toxic salt concentrations. Geochemical modeling using PHREEQC enabled prediction of the saturation state of minerals and indicated the dissolution and precipitation reactions occurring in the groundwater. Groundwaters were undersaturated with respect to amorphous silica. Stability diagram indicated that the dominant cluster of groundwater samples fell into the K-feldspar field.

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“…The positive yintercepts indicate the lack of planar K and strong ability of soils to absorb K. Due to this, K was not desorbed from the non-specific binding sites of these soils. Apart from these values, the rest soils have negative values of planar K indicating more K release into soil solution (Jalali, 2007). Specific potassium (Ks) is the quantity of potassium held on specific edges or peripheral interstices of stacks of clay plates (Holzmueller et al, 2007).…”

Section: Parameters Obtained From Graphical Analysis Of Q/i Plots Andmentioning

confidence: 99%

Potassium dynamics under enset (Ensete ventricosom cheesman) farming systems of Sidama zone, Southern Ethiopia

Auge¹,

Assefa²,

Woldeyohannes³

et al. 2018

J. Soil Sci. Environ. Manage.

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Potassium dynamics of soils is constituted by constantly changing relationship between soil K forms, and this relation is affected by some soil physical and chemical properties. Most Sidama (south Ethiopia) farmers grow enset crops which have high K requirements. The soils were collected from Awassa-Zuriya and Dale districts; 'Woinadega' (warm subtropical climate) and Hula district 'Dega' (wet, cool temperate climate). Overview of K dynamics in soils via Quantity-Intensity (Q/I) curves was used to evaluate the dynamics of K in fifteen soil samples representing the enset farming systems of Sidama. All of the Hula district soils and half of the Dale district soils had low percent K saturation. There were significant correlations between some soil properties and Q/I parameters and among equilibrium solution parameters and Q/I parameters. Variations among the mean quantity (±∆K) values of the soils were not significant. The Dale and Hula district soils had higher K intensity than the Awassa-Zuriya district soils; where the Hula (Adola kura kebele) soil had the highest value. Therefore, the Dale and Hula district soils will require frequent and split K applications since they have lower capacity to maintain long-term supply of K. On the other hand, Awassa-Zuriya district soils had high K quantity than the Dale and Hula district soils. This shows that the Awassa-Zuriya district soils have a higher potential to supply K for a longer period of time from the exchangeable pool. However, the AwassaZuriya district soils require less frequent and higher K fertilization to saturate the exchangeable pool to meet immediate potassium requirement of crops. The low equilibrium activity ratio of potassium and low potassium replenishing capacity of nearly all of the soils studied also indicated the need for K application.

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A Study of the Quantity/Intensity Relationships of Potassium in Some Calcareous Soils of Iran

Cited by 32 publications

References 24 publications

Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Potassium supplying capacity of some tropical alfisols in southwest Nigeria as measured by intensity, quantity and capacity factors

Groundwater geochemistry in the Alisadr, Hamadan, western Iran

Potassium dynamics under enset (Ensete ventricosom cheesman) farming systems of Sidama zone, Southern Ethiopia

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