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dc.contributor.authorBhattacharyya, Ranjan
dc.contributor.authorPrakash, Ved
dc.contributor.authorKundu, S.
dc.contributor.authorGhosh, B.N.
dc.contributor.authorSrivastva, A.K.
dc.contributor.authorGupta, H.S.
dc.date.accessioned2008-01-08T14:57:21Z
dc.date.available2008-01-08T14:57:21Z
dc.date.issued2006
dc.identifier.citationGeoderma, 137(1-2): 155–160
dc.identifier.doi10.1016/j.geoderma.2006.08.006
dc.identifier.urihttp://hdl.handle.net/2436/15831
dc.descriptionMetadata only
dc.description.abstractThe effect of 30 years of continuous cropping, fertilization and manuring on the potassium (K) balances, the soil K pools and the nonexchangeable K release in a Typic Haplaquept soil from Almora, India under a rainfed soybean–wheat cropping system were investigated. The apparent K balance was measured as the difference between the total K added and that removed by the crops. The results showed that the total removal of K by the crops exceeded the amount of total K applied to the soil in all the treatments showing a net negative K balance. This ranged from 3.7 in the plots under NK to 81.7 kg ha−1 year−1 in the N+FYM treated plots. Continuous annual application of recommended doses of NPK+10 t FYM (NPK+FYM) to soybean resulted in an accumulation (+56 kg K ha−1) of exchangeable K (1 N NH4OAc extractable K) in the 0–45 cm soil depth over the study period, despite the highest average annual uptake of K by the system (150.8 kg ha−1 year−1). However, there was a net depletion of exchangeable K (−80 kg K ha−1) in that soil depth under the NPK treated plots. The results also revealed that the content of non-exchangeable K decreased substantially from 3482 kg ha−1 to 2677 and 2896 kg ha−1 in the 0–45 cm soil layer after 30 years of cropping in the plots under NPK+FYM and NPK treatments, respectively. There was a significant decline in total soil K with the removal of non-exchangeable soil K in the surface (0–15 cm) soil layer (R2=0.526,Pb0.001, n=36). Thus, long-term application of non-revised recommended fertilizer rates may threaten sustainability of the rainfed continuous soybean–wheat system.
dc.language.isoen
dc.publisherElsevier
dc.relation.urlhttps://www.sciencedirect.com/science/article/pii/S0016706106002424?via%3Dihub
dc.subjectIndia
dc.subjectSoil fertility
dc.subjectPotassium balance
dc.subjectSoybean based cropping system
dc.subjectWheat
dc.subjectK balance sheet
dc.subjectFarmyard manure
dc.subjectLong term cropping
dc.subjectSoil K status
dc.titlePotassium balance as influenced by farmyard manure application under continuous soybean–wheat cropping system in a Typic Haplaquept
dc.typeJournal article
html.description.abstractThe effect of 30 years of continuous cropping, fertilization and manuring on the potassium (K) balances, the soil K pools and the nonexchangeable K release in a Typic Haplaquept soil from Almora, India under a rainfed soybean–wheat cropping system were investigated. The apparent K balance was measured as the difference between the total K added and that removed by the crops. The results showed that the total removal of K by the crops exceeded the amount of total K applied to the soil in all the treatments showing a net negative K balance. This ranged from 3.7 in the plots under NK to 81.7 kg ha−1 year−1 in the N+FYM treated plots. Continuous annual application of recommended doses of NPK+10 t FYM (NPK+FYM) to soybean resulted in an accumulation (+56 kg K ha−1) of exchangeable K (1 N NH4OAc extractable K) in the 0–45 cm soil depth over the study period, despite the highest average annual uptake of K by the system (150.8 kg ha−1 year−1). However, there was a net depletion of exchangeable K (−80 kg K ha−1) in that soil depth under the NPK treated plots. The results also revealed that the content of non-exchangeable K decreased substantially from 3482 kg ha−1 to 2677 and 2896 kg ha−1 in the 0–45 cm soil layer after 30 years of cropping in the plots under NPK+FYM and NPK treatments, respectively. There was a significant decline in total soil K with the removal of non-exchangeable soil K in the surface (0–15 cm) soil layer (R2=0.526,Pb0.001, n=36). Thus, long-term application of non-revised recommended fertilizer rates may threaten sustainability of the rainfed continuous soybean–wheat system.


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