Landform, Soils and Erosion in the North-Eastern Irangi Hills, Kondoa, Tanzania

Payton, Robert; Christiansson, Carl; Shishira, E. K.; Yanda, Pius Z.; Eriksson, Max

doi:10.2307/521285

Cited by 20 publications

(3 citation statements)

References 9 publications

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“…The major sources of nutrient supply to the agricultural system were found to be inorganic fertilisers (Input 1), manure (Input 2), crop residue additions (Input 3) and atmospheric deposition (Input 4). Although no fertiliser recommendations exist for study area, the whole of Dodoma (Mowo et al, 1993), the quantities of inorganic fertiliser used by respondent farmers fall far below the recommended rates for other places in Tanzania. In areas with similar soil types and agro-climatic conditions such as Shinyanga, the recommended rates ranges from 12-80 kg N/ha and 10-27 kg P/ha (Tosi et al, 1982).…”

Section: Major Sources Of Soil Nutrient Inputsmentioning

confidence: 91%

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Nutrient budget analysis under smallholder farming systems and implications on agricultural sustainability in degraded environments of semiarid central Tanzania

Kangalawe¹

2014

J. Soil Sci. Environ. Manage.

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Soil nutrient budget is one of the critical concerns in most farming systems, especially in degraded environments. This paper reveals a net nutrient removal from the agricultural system that resulted in negative budgets, particularly for N. Large variations existed between villages, with N budget ranging from-9.6 to-252.4 kg/ha/year, with a mean budget of-91.9 kg/ha/year. Various factors seem to have contributed to the negative budgets, including soil erosion, crop harvest and residue removals. The latter two contributed significantly less to nutrient losses compared to soil erosion. The main input sources for nutrients into the system were found to be manure, crop residues, atmospheric deposition and to a limited extent inorganic fertilisers. Manure application added into the soil about 13, 1.5, and 0.04 kg/ha/year of N, P and K respectively. Its use was, however, limited by the inadequate amounts available. Crop residues added about 3.9, 1.9 and 11 kg/ha/year of N, P and K respectively. The use of crop residues for nutrient recycling and soil maintenance is however, constrained by its competitive use for animal feed. Generally, this farming system seems to be characterised by negative nutrient budgets, limiting agricultural productivity and sustainability.

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Section: Major Sources Of Soil Nutrient Inputsmentioning

confidence: 91%

“…in Mafai). Soils of this area are classified as ferric acrisols (Tosi et al, 1982), ferralic cambisols (Mowo et al, 1993) and luvisols (Payton et al, 1992). According to FAO/UNESCO (1974), the three soil types belong to the low erodibility class.…”

Section: Landscape and Soil Characteristicsmentioning

confidence: 99%

Nutrient budget analysis under smallholder farming systems and implications on agricultural sustainability in degraded environments of semiarid central Tanzania

Kangalawe¹

2014

J. Soil Sci. Environ. Manage.

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“…Recent researches on semiarid environments have shown that land degradation resulting from such changes may lead to changes in the distribution of different types of vegetation cover, even when the total biomass is not necessarily changed (Tanser & Palmer, 1999). In many instances land degradation results in increased runoff and soil redistribution within the area through erosion and sedimentation processes (Payton et al, 1992;Yanda, 1995). This leads to spatial heterogeneity in soil ⁄ land properties that in turn influences agricultural productivity and the livelihoods of communities concerned.…”

Section: Land-cover Change Modelingmentioning

confidence: 99%

From Land Cover to Landscape Structure: Change and Fragmentation Analysis in Korup National Park, Cameroon

Innocent¹,

Bitondo²

2012

JGG

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Can the designation of protected area status in a human inhabited ecosystem limit anthropogenic activities within the boundaries of the protected area? To attempt an answer to this question, we used the Central zone of Korup National Park, Cameroon as an example. Comparing two satellite imageries (1986 and 2000), it was possible to assess land cover transformations, and with the FRAGSTATS software it was possible to quantify the changes of landscape characteristics in the area fourteen years after the creation of the park in 1986. The results revealed an increase in exposed surfaces (15.61%), which came at the expense of forest-land-cover (-12.69%) and water bodies (-2.92%). Meanwhile, landscape metrics demonstrated significant changes including, an increase in the number and size of patch, diversity and fragmentation. Overall, structural metrics for landscape indicated that anthropogenic activities still continue within the boundaries of the park. The results confirm the effectiveness of the combined method of remote sensing and metrics.

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Changes in the fluvial system of the Kondoa Irangi Hills, central Tanzania, since 1960

Eriksson

Reuterswärd

Christiansson

2003

Hydrological Processes

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Abstract:Using evidence from aerial photographs, supported by field checks, changes in the fluvial systems of three catchments in the Kondoa Irangi Hills, Kondoa District, central Tanzania were mapped. This area is known for its severely eroded landscape and, today, also for the drastic measures introduced to deal with the soil erosion problem. In the early stages these included mechanical construction of contour bunds, but later emphasis was placed on tree planting and planting of elephant grass on sand fans and dry, sandy riverbeds. Restrictions were introduced on clearing land for cultivation and on felling of trees for construction material and fuel wood. The most dramatic conservation measure was the eviction, in 1979, of all livestock from 19 villages to halt the severe overgrazing.Since the different conservation measures have now been in effect for more than 20 years, their impact can be assessed. The sand rivers, conspicuous features of the study area, have in many places decreased in width. Their total surface area in the three catchments decreased by about two-thirds between 1960 and 1987. Previously unvegetated sand fans have been converted to crop production. Natural vegetation is now establishing itself on formerly barren areas. However, the badlands, which cover some 25% of the study area and which take a very long time to recover, still seem to be relatively unaffected by the conservation efforts, although they decreased in extent by about 10% between 1960 and 1987. In the present report, the biophysical landscape changes and their implications for the drainage system in parts of the Kondoa Irangi Hills are discussed.

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Landform, Soils and Erosion in the North-Eastern Irangi Hills, Kondoa, Tanzania

Cited by 20 publications

References 9 publications

Nutrient budget analysis under smallholder farming systems and implications on agricultural sustainability in degraded environments of semiarid central Tanzania

Nutrient budget analysis under smallholder farming systems and implications on agricultural sustainability in degraded environments of semiarid central Tanzania

From Land Cover to Landscape Structure: Change and Fragmentation Analysis in Korup National Park, Cameroon

Changes in the fluvial system of the Kondoa Irangi Hills, central Tanzania, since 1960

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