2019
DOI: 10.1016/j.geoderma.2019.01.041
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Potassium supplying capacity of a red soil from eastern India after forty-two years of continuous cropping and fertilization

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Cited by 58 publications
(42 citation statements)
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“…It is well established in the recent literature (Das et al 2019;Islam et al 2017;Jalali 2007;Khan et al 2014;Moody and Bell 2006) that K fertilization management based on NH 4 OAc soil testing procedure often fails in predicting the exact amounts of K that have to be added, in order to replenish exhausted soil K pools and to increase crop yields to desired levels. The latter becomes even more important for soils that contain significant amounts of 2:1 fixing clay minerals like illite or vermiculite which is a common soil clay assemblage alongside with smectites in temperate soils like Greece (Velde, 2001), or for soils under intensive cropping.…”
Section: Discussionmentioning
confidence: 99%
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“…It is well established in the recent literature (Das et al 2019;Islam et al 2017;Jalali 2007;Khan et al 2014;Moody and Bell 2006) that K fertilization management based on NH 4 OAc soil testing procedure often fails in predicting the exact amounts of K that have to be added, in order to replenish exhausted soil K pools and to increase crop yields to desired levels. The latter becomes even more important for soils that contain significant amounts of 2:1 fixing clay minerals like illite or vermiculite which is a common soil clay assemblage alongside with smectites in temperate soils like Greece (Velde, 2001), or for soils under intensive cropping.…”
Section: Discussionmentioning
confidence: 99%
“…The above consideration is also reported in literature especially through quantity-intensity studies which support that there is a minimum K status in Kdeficient soils in which K ions are retained by the soil and do not exchange with Ca 2+ , despite their extraction by NH 4 OAc (Schneider 1997a, b). This portion of soil K may represent the amount of K ions fixed on some clay interlayer sites (Das et al 2019;Islam et al 2017), and thus, it could be said that it corresponds to a fraction of exchangeable K which is largely unavailable to plants.…”
Section: Discussionmentioning
confidence: 99%
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“…Con respecto al K, de acuerdo a Das et al (2019), este elemento es requerido por los cultivos casi en las mismas proporciones o en algunos casos mayor que el N; no obstante, la mayoría de los agricultores solo aplican N, o N y P sin considerar o solo agregando cantidades pequeñas de fertilizante potásico. Esto concuerda con los resultados en los Cuadros 2, 3 y 4, con bajos contenidos de K y elevadas concentraciones de P. Con relación a sitios de pH ácido, Legesse et al (2017) mencionan que la acidif icación del suelo resulta en la def iciencia de nutrientes, entre ellos el K. Diversos estudios han demostrado que la disponibilidad de K es menor en suelos ácidos (Zhang et al, 2009), lo cual reduce el rendimiento de los cultivos.…”
Section: Resultados Y Discusiónunclassified
“…Ultisols are highly weathered and leached soils, with low ability to retain nutrients in the soil matrix that are enriched in kaolinitic clays. Das et al (2019) also reported a high need for K + fertilization in cultivated kaolinitic red soils in eastern India.…”
Section: Discussionmentioning
confidence: 97%