Changes in soil nutrient content under shifting cultivation in the Chittagong Hill Tracts of Bangladesh

Gafur, Abdul; Borggaard, Ole K.; Jensen, J. R.; Petersen, Leif

doi:10.1080/00167223.2000.10649437

Cited by 40 publications

(38 citation statements)

References 16 publications

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“…DeBano et al (1979) reported that losses of soil N can occur when heated to temperature as high as 100 o C, which may happen during burning associated with shifting cultivation. Significant increase in available Ca and Mg of the preset study compared to forest land in most of the locations was in agreement with Gafur et al (2000), who also reported an increase of the two elements in shifting cultivated soil than mixed planted forest land in Banderban district.…”

Section: Discussionsupporting

confidence: 76%

“…Biswas et al (2010) also found in this mountainous region higher pH on land just after sowing at Alutila of Kharacharichari district. Gafur et al (2000) reported higher pH from shifting cultivated area with more run-off compared to vegetated land comprised of mixed trees of horticulture and forest species in Soil Conservation and Watershed Management Center at Banderban. At Muralipara with the presence slashed materials as well as at Sukurchari with the presence of paddy residues of previous year showed lower pH compared to mixed tree plantation.…”

Section: Discussionmentioning

confidence: 99%

“…Various reports (Miah et al 2010;Biswas et al 2010;Gafur et al 2000) indicate that shifting cultivation may either decrease or increase soil pH depending on cultivation stage, runoff condition and amount of organic matter present on the land. Higher pH in shifting cultivated land at three locations namely Burburichara, Maichhari and Langadu was associated with addition of ashes in soil from complete burning of earlier vegetation before sowing paddy seeds, turmeric and similar other crops and from deep hoeing of the soil.…”

Section: Discussionmentioning

confidence: 99%

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Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Haque¹,

Gupta²,

Miah³

2014

Journal of Forest and Environmental Science

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This research reports the effects of shifting cultivation on soil environment collecting samples from 0-5 cm soil depth from five locations viz. at Burburichhara, Maichchari, Longadu, Sukurchhari and Muralipara in Rangamati district of Chittagong Hill Tracts (CHTs). Soil analyses showed that fungal and bacterial population, microbial respiration and active microbial biomass, maximum water holding capacity, conductivity and moisture contents were significantly (at least p≤0.05) lower in shifting cultivated soil compared to adjacent mixed tree plantations at all the sites. On an average in soils of 5 different shifting cultivated lands fungal population was 1.33x10 5 CFU/g dry soil and bacterial population 1.80x10 7 CFU/g dry soil and in mixed plantations fungal population was 1.70x10 5 and bacterial population 2.51x10 7 CFU/g dry soil. Organic matter and exchangeable Ca and Mg contents were significantly (at least p≤0.05) lower and bulk density significantly (at least p≤0.05) higher in shifting cultivated land in most of the locations compared to adjacent mixed tree plantations. Ratios of microbial respiration and organic carbon as well as active microbial biomass and organic carbon were distinctly lower and pH higher at 3 locations in shifting cultivated soils compared to mixed plantations. Findings of various soil properties, therefore, suggest that shifting cultivation has deteriorating effects on soil environment.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Haque¹,

Gupta²,

Miah³

2014

Journal of Forest and Environmental Science

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“…Such activities affect soil physical and chemical properties, reduce nutrient stocks, and accelerate soil erosion and sedimentation. Gafur et al ( 2000 ) estimated soil loss of 43 Mg ha −1 year −1 due to shifting cultivation in Bandarban Hills, Bangladesh.…”

Section: Shifting Cultivationmentioning

confidence: 99%

Soil Resources and Soil Degradation

Osman¹

2013

Soil Degradation, Conservation and Remediation

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Including rocky surfaces, deserts, and ice-covered areas, there is 130,575,894 km 2 land area in the globe. About 38.5 million km 2 (29.45 % of the earth's ice-free land surface) is too dry for human habitation, and about 20.2 million km 2 (15.46 %) of the land occurring in the cold tundra zone is not much suitable for normal agriculture. Saline and alkaline soils occur in 3,105,000 km 2 (2.4 % of the land surface), and soil acidity affects 18,420,100 km 2 (14.1 % of the total land). Only about 12 % of the land surface is suitable for food and fi ber production, 24 % is grazing land, and about 31 % is forestland; the remaining 33 % has many constraints for most uses. The lands are classifi ed into eight land capability classes based on their productivity, limitations, climate, and soil conservation requirements. Class I land is the most suitable agricultural land, and Classes VII to VIII are not suited for cultivation. Agricultural soils are again classifi ed into nine land quality classes based on the integration of three soil performance classes and three soil resilience classes. Land quality I is the prime land. Suitability of cropping and productivity gradually decrease from Class I to Class IX. The global arable land area is estimated to be 1.351 billion hectares, and 38 % of the arable land has been degraded at variable intensities. The principal cause of soil degradation is the land mismanagement. GLASOD identifi ed fi ve main causes of soil degradation, including deforestation, overgrazing, mismanagement of agricultural land, overexploitation of vegetation, and (bio-) industrial activities. There are fi ve types of land/soil degradation: water erosion, wind erosion, physical deterioration, chemical deterioration, and degradation of biological activity. With this background, ten "laws of sustainable soil management" have been suggested.

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“…After independence, their situations were much worse. The increasing population combined with government control over common property resources was putting pressure on shifting cultivators to reduce the fallow period (Palm et al, 1996 andGafur et al, 2000). Meantime, shifting cultivators deserve improved lifestyle which was not possible from the low return being provided by their practice of cultivation.…”

Section: Introductionmentioning

confidence: 99%

Agricultural Intensification: Linking with Livelihood Improvement and Environmental Degradation in Mid-Hills of Nepal

Raut¹,

Sitaula²,

Bajracharya³

2010

J. Agric. & Environ.

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Changes in soil nutrient content under shifting cultivation in the Chittagong Hill Tracts of Bangladesh

Cited by 40 publications

References 16 publications

Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Soil Resources and Soil Degradation

Agricultural Intensification: Linking with Livelihood Improvement and Environmental Degradation in Mid-Hills of Nepal

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