Forms of soil potassium-A review

Lalitha, M.; Dhakshinamoorthy, M.

doi:10.5958/j.0976-0741.35.1.008

Cited by 39 publications

(19 citation statements)

References 16 publications

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“…Total-K was a large portion of the total potassium in soil occurs as structural component of soil minerals and was unavailable to plants (Lalitha and Dhakshinamoorthy., 2014). The content of total potassium depends on the type of parent material, type of primary and secondary minerals and type of soil fractions.…”

Section: -Total Potassiummentioning

confidence: 99%

Status and Distribution of Different Potassium Forms in Calcareous Soils in Northern Iraq

A-Badrani¹,

Ali²

2019

Mesopotamia Journal of Agriculture

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1n the last few years, the demand increased especially in the developing countries for food production. One of the parameters to increase the production quantitatively and qualitatively is the use of fertilizers by following the modern techniques in fertilization which needs a detail soil studies. This study highlighted on behavior of different forms of potassium, their distributions through soil profile, and the relationships between them and with soil other properties. To represent a detailed study of the potassium behavior, twenty two surface (0-15cm) and subsurface (15-30cm) soil samples were selected from Nineveh province. The soil chemical and physical properties of each location are different. Distribution of different forms of K in these soils, i.e., available, water soluble (H2O-K), exchangeable (NH4OAc-K), non-exchangeable (HNO3-K), mineral and Total forms were ranged from (0.708 to 1.167),(0.006 to 0.146), (0.691 to 1.124), (1.150 to 3.261), (35.48 to 52.81) and (38.78 to 58.65) respectively, for surface soil and (0.559-0.997),(0.003-0.105), (0.554 to 0.914), (0.997 to 2.801), (30.04 to 56.77) and (32.55 to 60.88) respectively, for sub-surface soil. Correlation study showed that the various forms of K were positively and significantly correlated amongst themselves and with CaCO3 content of the soils negatively. The water soluble, exchangeable; available; nonexchangeable and mineral potassium constituted only 0.075; 1.65 ;.1.73; 3.95 and 92.03 percent of the total-K respectively.

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Section: -Total Potassiummentioning

confidence: 99%

Status and Distribution of Different Potassium Forms in Calcareous Soils in Northern Iraq

A-Badrani¹,

Ali²

2019

Mesopotamia Journal of Agriculture

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“…The different forms of soil potassium are in dynamic equilibrium (as stated earlier) and any depletion in a given K form is likely to shift equilibrium in the direction to replenish it (Ramamoorthy and Paliwal, 1976). The K status in soil and the potential of K supply to plant is very much related with the distribution of K forms in the soil and the equilibrium between them (Pavlov, 2007) which is again influenced by the various physical, chemical, properties such as clay minerals, texture, moisture, cation exchange capacity (CEC), pH, concentrations of other ions (Lalitha and Dhakshinamoorthy, 2014).…”

Section: Issn: 2319-7706 Volume 8 Number 12 (2019)mentioning

confidence: 99%

Distribution of Different Forms of Potassium in Relation to Soil Properties in Agricultural Entisols of Terai Region of West Bengal, India

Singh¹,

Banik²,

Mukhopadhyay³

2019

Int.J.Curr.Microbiol.App.Sci

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“…However, available data in recent years indicate that the magnitude of crop response to potassium in these soils is increasing in areas of higher cropping intensity [4]. Soil K exists in four different forms viz., water soluble-K, most frequently available form to plants; exchangeable-K, held by negative charges on soil colloids and is readily available to plants; non-exchangeable or fixed-K, which is trapped between layers of expanding lattice [5].There is a dynamic equilibrium among different forms of soil potassium and any depletion in a given form would shift the equilibrium in the direction to replenish it [6]. Higher yields and crop quality can be obtained at optimal N: K nutritional ratios.…”

Section: Introductionmentioning

confidence: 99%

Distribution and Variation of Potassium in Black Soil at Different Stages of Crop Growth in Maize (Zea mays)

Gnanasundari

Sellamuthu

Malathi

2020

AJOPACS

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Potassium (K) is the third most important major plant nutrient with numerous functions. The availability of K depends on concentration relative to that of Ca2+ and Mg2+ than on the total quantity of K present. The level of extraction of K by different extractants followed the order: boiling HNO3 (1 M) > Non- exchangeable K > Exchangeable K > Water soluble K. The amount of K extracted by different extractants was more in non- calcareous soil followed by calcareous soil. To know the K availability in both the soils, a pot culture experiment was conducted with the two soils (i.e., calcareous and non-calcareous) to know the response of maize to K application. Results showed that a significant higher value of available K in calcareous soil under potassium @ 120 kg K2O ha-1 treatment followed by 80 kg K2O ha-1 in non-calcareous soil irrespective of critical growth stages of hybrid maize. Among the K fractions, water soluble K was the least in magnitude and lattice K was found to be dominant one. Application of 120 kg K2O ha-1 recorded the highest potassium in all the K fractions (water soluble K, exchangeable K and nitric acid soluble K) in all stages of crop growth in calcareous soil whereas in non-calcareous soil 80 kg K2O ha-1 recorded high in all the fractions and the results emphasizing the importance of potassium in soil. Grain and straw yield of hybrid maize were significantly higher under 120 kg K2O ha-1in calcareous soil and 80 kg K2O ha-1 in non- calcareous soil which is well evidenced by a yield increase of 37.7 % over control. A significant and positive correlation was existing between all fractions of potassium viz., HNO3 soluble K, non- exchangeable K, exchangeable K, water soluble K and available K with grain and stover yield in calcareous soil and non- calcareous soil. It was found that calcareous soil showed comparatively better response to the application of potassium especially in water soluble K with an R2 value of 0.917** followed by HNO3 soluble K with a R2 value of 0.895**. Therefore, the present investigation stresses the vital importance of inclusion of higher dose of potassium in calcareous soil for maintaining soil K dynamics and enhancing yield of hybrid maize so as to sustain soil productivity.

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Forms of soil potassium-A review

Cited by 39 publications

References 16 publications

Status and Distribution of Different Potassium Forms in Calcareous Soils in Northern Iraq

Status and Distribution of Different Potassium Forms in Calcareous Soils in Northern Iraq

Distribution of Different Forms of Potassium in Relation to Soil Properties in Agricultural Entisols of Terai Region of West Bengal, India

Distribution and Variation of Potassium in Black Soil at Different Stages of Crop Growth in Maize (Zea mays)

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