Spatial variability of fertility status in soils of Dima Hasao district of Assam

Basumatary, Anjali

doi:10.47815/apsr.2021.10086

Cited by 5 publications

(10 citation statements)

References 7 publications

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“…The findings were substantiated with the positive significant correlation with OC, CEC and clay content (r= 0.384**, 0.417**, 0.406**). Similar result was observed by Basumatary et al [19] in Dima Hasao district. "The available P content in different jhum cycle and the undisturbed soil increased with the increase in jhum fallow cycle.…”

Section: Primary Nutrientssupporting

confidence: 89%

“…The higher value of exchangeable Ca and Mg in the longer jhum fallow cycle might be due to increase in soil pH and organic carbon content as compared to initial jhum fallow cycle [8,18]. Correlation study also showed that both exchangeable Ca and Mg exhibited a significant and positive correlation with pH, OC, and CEC indicating that these properties played an important role in improvement of status of exchangeable Ca and Mg in shifting cultivated areas of Dima Hasao [19] deficit status of exchangeable Ca and Mg in the soils of Dima Hasao.…”

Section: Secondary Nutrientsmentioning

confidence: 96%

“…The pH of the studied area varied from very strongly acidic to moderately acidic in nature.High acidity was found in short jhum, medium jhum and the long jhum soils of Dima Hasao district, whereas the pH of undisturbed soil was found mostly moderate acidic(Table 1). Basumatary et al [19] also reported "the acidic condition in the soils of Dima Hasao". "The strongly acidic nature of the soil in short jhum fallows cycle might be due to anthropogenic disturbance of the terrestrial ecosystem and burning down of vegetation that exposes the soil to raindrop impacts and leads to leaching of bases from the exchange complex under the prevailing high rainfall and hilly topography" [20,1].…”

Section: Soil Phmentioning

confidence: 96%

“…Moreover, greater CEC could be as a result of the increase in the accumulation of litter that also increase in organic matter content of the soil [26]. Basumatary et al [19] also reported that cation exchange capacity of Dima Hasao soil was invariably low [4.5 to 10.25 cmol(p+) kg+] reflecting the dominance of low activity clay (Kaolinite). The variation in clay, OC and free iron and aluminum oxides content of the soils might have resulted in variation in CEC of different soils [29].…”

Section: Cation Exchange Capacity (Cec)mentioning

confidence: 99%

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Soil Fertility Status in Relation to Fallow Cycle in Shifting Cultivated Areas of DIMA HASAO

Nunisa

Tamuly

Hojai

et al. 2023

IJPSS

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Aim: To understand the effect of fallow cycle on soil fertility status under shifting cultivation. Study Design: Latin square design (LSD). Place and Duration of Study: Dima Hasao District, Assam. Between September 2019- August 2021. Methodology: The present investigation was carried to study the effect of jhum fallow cycle on soil properties in the DIMA HASAO district of Assam. Total of 120 geo-referenced soil samples were collected from short jhum (1-3yrs.) fallow cycle, medium jhum (4-6yrs.) fallow cycle, long jhum (7-9 yrs.) fallow cycle and undisturbed soil. The collected soil samples were analyzed for parameters like pH, OC, N, P, K, S, Ca, Mg, CEC and soil texture. Results: The studied soil samples showed wide variations in texture varying from sandy loam to clay loam. Coarse texture sand was found to be dominant in short jhum and medium jhum while finer particles (silt and clay) were dominant in the long jhum and the undisturbed soil. The Soil pH was found lowest (mean value 4.55) in short jhum and highest (mean value 5.00) in the undisturbed soil. The OC content was minimum at initial short jhum fallow cycle and maximum was observed in the Undisturbed soil. The CEC of the study area was found highest in undisturbed soil (mean value 8.64 cmol (p+) kg-1) followed by long jhum, medium jhum and short jhum. The Avl. N content of the study area was found low to medium. Among the jhum fallow cycle Avl. N of short jhum was lowest (mean value 269.30kgha-1) followed by medium jhum, long jhum and highest in undisturbed soil (mean value 350.11 kgha-1). The Avl. P content of the study area was found low to medium, highest mean value 12.61 kg ha-1 was observed in long jhum fallow cycle and lowest in short jhum (mean value 9.33 kgha-1). The highest content of Avl. S was observed in long jhum fallow cycle and lowest in the short jhum. The highest of Ex. Ca, Mg was found in the undisturbed followed by long jhum, short jhum and lowest in the medium jhum. All the soil fertility parameters i.e., N, P, K, S, Ca and Mg exhibited significant positive correlation with pH, OC, CEC, and percent Clay. Conclusion: From the study it was observed that minimum of 7 to 10 years jhum fallow cycle is required in Dima Hasao are for the soil to restore its fertility and sustainable jhum cultivation.

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Section: Primary Nutrientssupporting

confidence: 89%

Section: Secondary Nutrientsmentioning

confidence: 96%

Section: Soil Phmentioning

confidence: 96%

Section: Cation Exchange Capacity (Cec)mentioning

confidence: 99%

See 2 more Smart Citations

Soil Fertility Status in Relation to Fallow Cycle in Shifting Cultivated Areas of DIMA HASAO

Nunisa

Tamuly

Hojai

et al. 2023

IJPSS

View full text Add to dashboard Cite

show abstract

“…This might be due to high clay content in the lower horizon compared to the upper horizon, which led to impeded leaching, consequently, accumulation of calcium and magnesium in the lower horizon. Similar results were reported by Narsaiah et al (2018) and Basumatary et al (2021). It was clear that Mg 2+ was present in lower amount than Ca 2+ because of the higher mobility of the former ion.…”

Section: Soil Fertilitysupporting

confidence: 88%

GIS-based soil fertility assessment of a micro-watershed of semi-arid tropics in southern India

KUMAR¹

2022

APSR

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Available macronutrient status in the soil of Chotanahalli micro-watershed (468 ha) in Kunigal Taluk, Tumkur district was studied with the aid of GIS. Forty three surface soil samples at 320 m grid were collected from Chotanahalli micro-watershed and assessed for the soil organic carbon, available nitrogen, phosphorus, potassium, calcium, magnesium and sulphur. Results revealed that the ranges of SOC, available N, P and K were 2.1 to 7.5 g kg-1, 282.2 to 526.8 kg N ha-1, 8.0 to 67.6 kg P2O5 ha-1 and 124.3 to 338.5 kg K2O ha-1, respectively. Spatial interpolation revealed that majority (321 ha) of the watershed was low in SOC, whereas the whole watershed was medium in available N, P and K. In case of secondary nutrients, available S was found to be medium in majority (423.4 ha) of the area, whereas, exchangeable Ca and Mg were found sufficient in the whole watershed. The Nutrient Index values indicated that the micro-watershed was under “medium” category for available nitrogen, phosphorus, potassium and sulphur, whereas, it fell under “low” category with respect to organic carbon. Measures to improve the status of SOC should be taken up in the study area for sustainable production of crop.

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Land Use, Landform, and Soil Management as Determinants of Soil Physicochemical Properties and Microbial Abundance of Lower Brahmaputra Valley, India

et al. 2022

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Due to the shifting course of the Brahmaputra River, the fluvial landforms of the Brahmaputra Valley of Assam, India, are prone to changes in landform and land use. For sustainable soil management under such conditions, it is crucial to have information about soil physicochemical and biological properties for different land uses. Therefore, the present study was conducted to investigate the soil physicochemical properties and soil microbial population across five major land uses under different landforms, such as paddy fields, banana systems, and arecanut cultivations in the alluvial plains; and rubber plantations and sal forests in the uplands, with varying slope gradients and soil depths (0–25 cm and 25–50 cm) in the lower Brahmaputra Valley. The results of the analysis of variance revealed that the effects of different landforms and land uses were found to be statistically significant on very labile soil organic carbon (VLSOC), available K, B, Fe, Mn, Zn, and Cu, and soil moisture content across two different soil depths. Paddy cultivated systems recorded the highest (1.23%) soil organic carbon (SOC), but these levels were statistically at par with other land use scenarios except for banana systems; whereas, forests and rubber plantations showed the highest VLSOC (0.38% and 0.34%, respectively,) and were significantly different from other land use scenarios. All soil microbial populations (bacteria, fungi, and actinomycetes) studied varied significantly in different land uses across varying soil depths. Perennial land uses under arecanut, rubber, and forest cultivations showed significantly higher microbial populations than paddy and banana systems. The principal component analysis (PCA) identified SOC, VLSOC, Cu, K, B, P, and the bacteria count as the major soil quality parameters of the study area. The results showed that landforms, land use, and management practices collectively affect soil properties. Therefore, soil management choices should take into consideration the landforms and land use for maintaining soil health and its sustainability.

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Spatial variability of fertility status in soils of Dima Hasao district of Assam

Cited by 5 publications

References 7 publications

Soil Fertility Status in Relation to Fallow Cycle in Shifting Cultivated Areas of DIMA HASAO

Soil Fertility Status in Relation to Fallow Cycle in Shifting Cultivated Areas of DIMA HASAO

GIS-based soil fertility assessment of a micro-watershed of semi-arid tropics in southern India

Land Use, Landform, and Soil Management as Determinants of Soil Physicochemical Properties and Microbial Abundance of Lower Brahmaputra Valley, India

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