Soil Fertility and Crop Yield Variability under Major Soil and Water Conservation Technologies in the Usambara Mountains, Tanzania

Mwango, S. B.; Msanya, Balthazar M.; Mtakwa, Peter; Kimaro, Didas N.; Deckers, Jozef; Poesen, Jean; Meliyo, Joel L.; Dondeyne, Stefaan

doi:10.9734/jsrr/2015/13692

Cited by 4 publications

(3 citation statements)

References 8 publications

(6 reference statements)

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“…Exchangeable potassium is significantly at (p < 0.01) and negatively (r = -0.431) correlated with bulk density. The results of this study is consistent with the finding of Mwango et al (2015) who reported that, a significant correlation between phosphorus and soil pH was observed.…”

Section: Available Phosphorus (Avp Mg/kg) and Exchangeable Potassium supporting

confidence: 93%

“…However, negatively correlated with bulk density (r = -0.201) and (r = -0.304) sand and the correlation is not significant in both case at (p < 0.01 and 0.05. The result is in line with that of Mwango et al (2015) who reported that total nitrogen was significantly correlated with OC and phosphorus (p<.001).…”

Section: Total Nitrogen (Tot N%)supporting

confidence: 92%

“…The results of this study are consistent with the investigation of Santillano et al (2012), the patterns of lateral and by slope movements regardless of fertilizer potassium (K+) had more lateral mobility than phosphorus. Another finding, reported by Esser et al (2002); Dercon et al (2003); Vancampenhout et al (2006); Mwango et al (2015) the higher phosphorus contents in the lower gradient that are explained as the capacity of phosphorus to strongly adhere to the soil particles case the available form of phosphorus (phosphate) is negatively charged thereby always adheres to on active sites on the surfaces of soil particles; attributes to transport down slope by tillage and water erosion.…”

Section: Available Phosphorus (Avp Mg/kg) and Exchangeable Potassium mentioning

confidence: 86%

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Inter-structural Space Effect of Fanya juu and Soil Bund Soil and Water Conservation Structures on Selected Soil Properties: In the Case of Habru District, North Ethiopia

Bogale¹

2020

JEES

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Land degradation is one of the most serious environmental problems in Ethiopia. To halt the problem, large scale soil and water conservation (SWC) practices such as; fanya juu, soil bund and other physical structures were implemented in the different parts of the country including Habru district. However, development of fertility gradient between the two successive SWC structures makes debatable to use the implemented structures in the sustainable manner. The study aimed at evaluating the spatial variability in soil properties between inter-structuralterrace area. Representative Kutaye catchment was deliberately selected based on the availability of fanya juu and soil bund. Then the catchment was subdivided into two sub-watersheds, cropland treated with fanya juu and cropland treated with soil bund based on the structural dominance. Inter-structure-terrace plots were independently selected and systematically replicated (second, fourth and sixth) between two SWC structures for the purpose of soil sampling. In order to evaluate selected soil property variation, the soil samples were taken following the contour between the two successive structures. Additionally, undisturbed core samples were collected for the bulk density analysis. The samples were analyzed following standard laboratory procedure and parameters like; soil texture, bulk density (Bd), soil reaction (pH), organic carbon (OC), total nitrogen (TotN) available phosphorus (AvP), cation exchange capacity (CEC), exchangeable potassium (K+) and electrical conductivity (EC) were determined. Statistical analysis was performed using SPSS v.20 software. Parameter relative distance was created for allowing comparison; because the distance between the successive SWC structures were highly variable. Oneway ANOVA was used; selected soil properties as dependent and relative distance (inter-structure area) as independent variables. Tukey (HSD test) was used for mean separation between relative distance at p < 0.05. The result revealed that soil properties percentage of sand and clay significantly influenced by inter-structure-spaces plots treated with fanya juu at p < 0.05. In both SWC structures, cation exchange capacity (CEC), exchangeable potassium (K+) and bulk density (Bd) were significantly (p < 0.05) affected with inter-structure space. In order to manage variation in some soil properties between the successive SWC inter-structures-space area; optimizing its' inter-structural terrace space and application of site-specific soil management practices were suggested with appropriate contour ploughing.

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Section: Available Phosphorus (Avp Mg/kg) and Exchangeable Potassium supporting

confidence: 93%

Section: Total Nitrogen (Tot N%)supporting

confidence: 92%

Section: Available Phosphorus (Avp Mg/kg) and Exchangeable Potassium mentioning

confidence: 86%

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Inter-structural Space Effect of Fanya juu and Soil Bund Soil and Water Conservation Structures on Selected Soil Properties: In the Case of Habru District, North Ethiopia

Bogale¹

2020

JEES

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The use of pedo-transfer functions for estimating soil organic carbon contents in maize cropland ecosystem in the Coastal Plains of Tanzania

Mwango

Wickama

Msanya

et al. 2019

CATENA

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The impacts of landscape positions and land management practices on soil physicochemical properties in Mancha Galgo watershed, Rift Valley Basin of Ethiopia

Mathewos

Hailu

Ketema

2023

Geology, Ecology, and Landscapes

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Soil Fertility and Crop Yield Variability under Major Soil and Water Conservation Technologies in the Usambara Mountains, Tanzania

Cited by 4 publications

References 8 publications

Inter-structural Space Effect of Fanya juu and Soil Bund Soil and Water Conservation Structures on Selected Soil Properties: In the Case of Habru District, North Ethiopia

Inter-structural Space Effect of Fanya juu and Soil Bund Soil and Water Conservation Structures on Selected Soil Properties: In the Case of Habru District, North Ethiopia

The use of pedo-transfer functions for estimating soil organic carbon contents in maize cropland ecosystem in the Coastal Plains of Tanzania

The impacts of landscape positions and land management practices on soil physicochemical properties in Mancha Galgo watershed, Rift Valley Basin of Ethiopia

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