Changes in Soil Nutrient Status After Abandonment of Swidden Agriculture at Benuaq Dayak Village

Soil changes induced by Acacia mangium plantation establishment: Comparison with secondary forest and Imperata cylindrica grassland soils in South Sumatra, Indonesia

“…The same relationship between soil pH and base saturation or exchangeable cations occurs in woody vegetation (e.g., primary forest, secondary forest, or plantation) and grassland (e.g., pasture or degraded grassland) ecosystems in other tropical areas (Sanchez, 1985;Reiners et al, 1994;Montagnini et al, 1995;Ohta et al, 2000;McGrath et al, 2001;Krishnaswamy and Richter, 2002). Further, there are similar trends in pH with depth in the upper pedon of forested vegetation and Imperata grassland in East Kalimantan, Indonesia (Ohta and Effendi, 1993;Morisada et al, 2000;Ohta et al, 2000). The lack of differences in Ex-K among the vegetation types is likely due to its high mobility in soil-plant systems.…”

Prospecting for Prehistoric Gardens: Results of a Pilot Study

“…Heidenreich (, p. 182) notes that swidden agricultural can either increase or decrease P depending on the nature and length of use and intensity of burning (see also Morisada et al ., ). Both magnetic susceptibility (MS) and P can be enriched through heating (especially MS) and additions of organic matter (OM) during fallow intervals.…”

“…The effects of agriculture on soils are varied, but well studied (e.g. Eidt, ; Sandor et al ., ; Ball and Kelsay, ; Coultas et al ., ; Kauffman et al ., ; Miller and Gleason, ; Lawrence et al ., ; Leonardi et al ., ; Morisada et al ., ; Ohta et al ., ; Beach et al ., ; Sombroek et al ., ; Branch et al ., ; Wilson et al ., ; Alekseeva et al ., ; Costa et al ., ). Even slight alterations of soil properties are remarkably persistent (e.g.…”

“…Phosphorus is an essential nutrient for plants, ‘their roots remove phosphorus… from the soil… If these plants are part of a crop the loss [from the system] is permanent’ (Leonardi et al ., , p. 347) resulting in local depletions of P and other nutrients. Depletion of P is one of the primary reasons for field abandonment and this depletion can persist after abandonment (Morisada et al ., , p. 74–75; see also Middleton, , p. 56). Where enrichment has been found, it is most often associated with external additions to the soil (Sombroek et al ., ; Entwistle et al ., , p. 409; Oonk et al ., , p. 38; Glazer and Birk, ; Costa et al ., ).…”