Sulfur distribution in five Ethiopian Rift Valley soils under humid and semi-arid climate

Itanna, Fisseha

doi:10.1016/j.jaridenv.2005.01.010

Cited by 57 publications

(39 citation statements)

References 15 publications

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“…These authors described that seals and crusts have higher density, higher shear strength, finer pore size distribution, and lower saturated hydraulic conductivity than uncrusted soils (Shainberg, 1992). Similarly, Itanna (2005) described that surface crusting and hardpan formation of the soils of CRV areas are the obvious symptoms of the land degradation. Many explained that these crusts and seals have greatly reduced infiltration rates because of their low porosity and lack of macropores (Singer, 2006).…”

Section: Original Researchmentioning

confidence: 97%

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Effect of Growth Media, Starter N and P Fertilizers on Growth and Yield of Tomato under Rainfed Condition in the Central Rift Valley of Ethiopia

Etissa¹,

Dechassa²,

Alemayhu³

2016

Sci. Technol. Arts Res. J.

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Experiment was conducted to evaluate media mix ratios (various soil: sand: and decomposed FYM proportions) and to study the effect of supplementary nitrogen (0 and 25 kg N ha phosphorous (0 and 23 kg P ha -1 ) for container grown tomato crop during the rainy season under field condition at Melkassa Agricultural research, Ethiopia. Three factors, namely, media proportions; supplementary N and P applications rates were combined fac replications. Data on canopy characteristics such as plant height, stem diameter, main lateral branch length, canopy width, canopy depth were measured from sample plants and canopy cover was estimated. Additionally, tomato early blight data were analysed using SAS. The results indicated that use of media mix ratios in combination with application of starter P fertilizer had a significant effect on shoot fresh weight, canopy diameter and marketable fruit number where as application of starter N had highly significant influence on canopy width, leaf fresh weight, leaf dry weight, leaf area and canopy cover. Similarly, application of starter N had significant effect on mean marketable fruit number. Thus, based on the results of this study the proposed media mixes is MR3 (4:1:1) that suits organic tomato production. Although there was no significant difference between supplementary application of 25 kg N ha -1 and no N application for container grown tom the rate of 25 kg ha -1 was found to be better yielding. Similarly, compared to 0 kg P ha application of 23 kg P ha -1 produced higher fruit yield. Although there was increase in fruit yields of tomato crop, further research is required for management of supplementary N and P fertilizer uses in container grown tomato cultivation under both rainfed and irrigated conditions.

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Section: Original Researchmentioning

confidence: 97%

“…This was mainly due to soil sealing and crusting problem in a container caused by frequent irrigation water using a plastic bucket. There are many published (Itanna, 2005) and unpublished reports that soils around Melkassa (in the CRV area) usually form sealing and crusting after rainfall and furrow irrigations.…”

Section: Original Researchmentioning

confidence: 99%

Effect of Growth Media, Starter N and P Fertilizers on Growth and Yield of Tomato under Rainfed Condition in the Central Rift Valley of Ethiopia

Etissa¹,

Dechassa²,

Alemayhu³

2016

Sci. Technol. Arts Res. J.

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“…The mean monthly temperature varies from 18.5°C to 21.6°C with mean annual temperature of 20°C. The soil type of the study site is Haplic Andosols, Typic Haploxerands (Zewdie 2004;Itanna 2005), and it is of sandy loam texture. The vegetation of the area is characterized as tropical savannah (Getachew and Ståhl 1998) dominated by Acacia species, shrub and bushes.…”

Section: Site Descriptionmentioning

confidence: 99%

Susceptibility of soil to wind erosion in arid area of the Central Rift Valley of Ethiopia

2015

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Background: In Central Rift Valley (CRV) of Ethiopia, renewable land resources are under pressure. Acacia woodland clearance, frequent cultivation, crop residue removal and mono-cropping are among the major land mis-management practices in the area. This has largely been affecting the soil quality. The current study is aimed at assessing the impact of Acacia woodland conversion, and the subsequent mis-managements on selected soil physical properties, and their relation to the prevailing wind erosion in the area. For this study, four land use/land cover types, namely protected woodland (PWL), managed pastureland (MPL), parkland agroforestry (PAF) and treeless cropland (TLCL) were considered. Results: Higher (P < 0.001) macro-aggregates (>0.25 mm) fraction of soil was found under PWL and MPL while higher fraction of micro-aggregates (0.053-0.25 mm) of soil was found under PAF and TLCL. Soil under PAF and TLCL had higher (P < 0.001) proportion of aggregates of < 1 mm, implying potential susceptibility of the soil to wind erosion. Higher soil bulk density (BD) was found in the most top layer (0-15 cm) of TLCL and PAF, and this could be attributed to the trampling effect by animals freely released to these land use types. Conclusion: In the study area, conversion of native woodland to PAF and TLCL and the subsequent mismanagements negatively affected some soil physical properties, thereby enhancing severity of soil erosion by wind. In contrast, although not commonly practiced by smallholder farmers, soil under MPL is more stable and less susceptible to wind erosion.

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“…Sulfur availability is partially related to soil moisture (Itanna, 2005). Sardans et al (2006Sardans et al ( , 2008 reported a negative correlation between leaf sclerophylly and leaf S concentration in a Mediterranean forest.…”

Section: Introductionmentioning

confidence: 99%

Seed priming and sulfur effects on soybean cell membrane stability and yield in saline soil

Bejandi

Sedghi

Sharifi

et al. 2009

Pesq. agropec. bras.

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-The objective of this work was to determine the effects of seed priming and sulfur application on cell membrane characteristics, seedling emergence, chlorophyll content and grain yield of soybean (Glycine max) in saline soil. A complete-block design in 4x3 factorial arrangement with three replicates was used to test four types of seed priming (water, auxin, gibberellin and non-priming) and three levels of sulfate availability (0, 70 and 140 kg ha -1 K 2 SO 4 ). The soil had a silty loam texture with an electrical conductivity of 3.61 ds m -1, a pH of 8.2 and a saturation percentage of about 46%. Seed priming had significant effects on mean emergence rate (MER), emergence percentage, relative water content (RWC) of leaves, relative chlorophyll content, time of maturity, shoot length and grain yield. The highest values for these variables were observed in the priming treatments, except for the time of maturity. Sulfur application had significant effects on MER, shoot length, RWC, membrane injury index and grain yield. Priming treatments provide greater emergence rates and grain yields and interact sinergicaly with sulfur rates.

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Sulfur distribution in five Ethiopian Rift Valley soils under humid and semi-arid climate

Cited by 57 publications

References 15 publications

Effect of Growth Media, Starter N and P Fertilizers on Growth and Yield of Tomato under Rainfed Condition in the Central Rift Valley of Ethiopia

Effect of Growth Media, Starter N and P Fertilizers on Growth and Yield of Tomato under Rainfed Condition in the Central Rift Valley of Ethiopia

Susceptibility of soil to wind erosion in arid area of the Central Rift Valley of Ethiopia

Seed priming and sulfur effects on soybean cell membrane stability and yield in saline soil

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