Non-exchangeable potassium release and its removal in foot-hill soils of North-west Himalayas

Auteur(s) et Affiliation(s)

SHARMA, A.

Dryland Research Sub-Station, Sher-e-Kashmir Univ. of Agricultural Sciences and Technology, Jammu, Inde

JALALI, V.K.

Division of Soil Science and Agriculture Chemistry, Sher-e-Kashmir Univ. of Agricultural Sciences and Technology, Fac. of Agriculture, Jammu, Inde

ARORA, S.

Division of Soil Science and Agriculture Chemistry, Sher-e-Kashmir Univ. of Agricultural Sciences and Technology, Fac. of Agriculture, Jammu, Inde

Description :
Soils representing 10 locations and 3 agro-climatic zones of foot-hills of north-west Himalayas were studied to assess Non-exchangeable Potassium (NEK) reserves, its release and influence of K-fixing capacity and clay minerals on NEK release. In order to study the NEK removal from the soils under investigation, maize was grown as a test crop and potassium was applied through 4 treatments having 4 levels of K applied as KCL. The information about NEK release, its removal as well as its relationship with K fixing capacity, clay minerals and relative soil quality index (RSQI) can be used for understanding the K buffering potential of soils especially under adverse soil and climatic conditions that prevail in southwest India. Besides, the regression equations developed can be used for predicting NEK release on the basis of K fixing capacity and clay mineralogical composition.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 82, n°. 2, p. 112-117, nombre de pages : 6, Références bibliographiques : 31 ref.

Date :
2010

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais