Understanding the effect of shifting cultivation practice (slash-burn-cultivation-abandonment) on soil physicochemical properties in the North-eastern Himalayan region

Mishra, Gaurav; Giri, Krishna; Jangir, Abhishek; Vasu, Duraisamy; Rodrigo‐Comino, Jesús

doi:10.14198/ingeo.17820

Cited by 3 publications

(1 citation statement)

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“…The higher content of available K in the longer fallow cycle might be due to creation of favorable soil environment with presence of higher content of organic carbon as compared to shorter jhum fallow cycle [18]. During slashing and burning operation in the jhum field, the ash deposited by burning the biomass release K, resulting in higher availability of K [38,39].…”

Section: Primary Nutrientsmentioning

confidence: 99%

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 Nutrientsmentioning

confidence: 99%

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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Effect of shifting cultivation and fallow on soil quality index in Mokokchung district, Nagaland, India

2022

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Background Shifting cultivation is a major agriculture practice in the Nagaland state of India. This study examines the effect of shifting cultivation and the length of the fallow period on soil quality index (SQI). Four sites were selected for the study, viz., a shifting cultivation site (SCS), a 3-year-old fallow land (FL-3), a 7-year-old fallow land (FL-7), and a 12-year-old fallow land (FL-12). Soil parameters were recorded seasonally and SQI was calculated from the minimum data set. Results With the increase in the fallow period, the values of conductivity, soil organic carbon, available nitrogen, available phosphorus, exchangeable potassium, moisture, clay, and cation exchange capacity of soil increased. Meanwhile, soil pH and bulk density decreased with fallow duration. The additive SQIa values were in the order SCS < FL-3 < FL-12 < FL-7; meanwhile, the weighted SQIw values were in the order SCS < FL-3 < FL-7 < FL-12. It is also observed that the SQI value decreases with the increase in soil depth under both the weighted and additive indexes. SCS with the lowest SQI value reflects the reduced soil organic carbon (SOC) and macronutrients. Increased SOC levels in site FL-12 (2.88–3.94%) may be one reason for its higher SQI value. Conclusions Our study highlights that unsustainable practices of shifting cultivation and reduction in the fallow period negatively affect soil quality. Furthermore, the study also recommends the use of the weighted method of SQI as it agrees with the reports of land use causing alteration in the soil quality. Our findings may be utilized to quickly access and disseminate information to the stakeholders and aid in constructing local soil quality index maps of the region. There is an urgent need for a rapid, cost and resource-efficient soil quality assessment and SQI may be one tool that achieves this goal.

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Land use changes effect by slash and burn cultivation to understory diversity composition and soil degradation

Setiawan,

Pamungkas,

Ito

et al. 2024

J. Degrade. Min. Land Manage.

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This study contributes to understanding ecological changes in land use following slash-and-burn land clearing. This study aimed to compare the richness and density of plant species and soil fertility in farmland cultivated for one year (1 Y), three years (3 Y), and five years (5 Y) after slash-and-burn, with the conditions in the secondary forest (SF) in Berau Regency of East Kalimantan. Understory plant taxon types, numbers, and soil organic matter were measured in each region using a series of nested plots. The size of each observation plot was 20 x 100 m. Data on understory vegetation composition was collected using 1 x 1 m mini plots at 20 sampling points and divided into five blocks, with a 10 m spacing between sampling points on each property. Understory vegetation species and cover percentage, litter cover percentage, open soil percentage, and soil fertility were measured for each observation plot. The results showed that the land cover percentage increased each year during the 5 years transition from secondary forest to farmland. Furthermore, within the 5 years, there was a change in understory species, particularly the presence of grasses and sedges at 3 and 5 years after the land use change. However, the transition from secondary forest to farmland within 5 years did not alter soil organic matter and total nitrogen.

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Understanding the effect of shifting cultivation practice (slash-burn-cultivation-abandonment) on soil physicochemical properties in the North-eastern Himalayan region

Cited by 3 publications

References 50 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

Effect of shifting cultivation and fallow on soil quality index in Mokokchung district, Nagaland, India

Land use changes effect by slash and burn cultivation to understory diversity composition and soil degradation

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