scholarly journals Assessing Sediment-Nutrient Export Rate and Soil Degradation in Mai-Negus Catchment, Northern Ethiopia

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Gebreyesus Brhane Tesfahunegn ◽  
Paul L. G. Vlek
Keyword(s):  
Soil Degradation ◽  
Soil Samples ◽  
Northern Ethiopia ◽  
Nutrient Export ◽  
Replacement Cost ◽  
Soil Calcium ◽  
Standard Procedures ◽  
Central Ridge ◽  
Nutrient Replacement ◽  
Potassium Magnesium

Even though soil degradation challenges sustainable development, the use of degradation indicators such as nutrient export (NE) and nutrient replacement cost is not well documented at landform level. This study is aimed to investigate the extent of soil degradation, NE rates, and their replacement cost across landforms in the Mai-Negus catchment, northern Ethiopia. Different erosion-status sites (aggrading, stable, and eroded) in the landforms were identified, and soil samples were randomly collected and analysed. Nutrient export, replacement cost, and soil degradation were calculated following standard procedures. This study showed that soil degradation in the eroded sites ranged from 30 to 80% compared to the corresponding stable site soils, but the highest was recorded in the mountainous and central ridge landforms. Average NE of 95, 68, 9.1, 3.2, 2.5, and 0.07 kg ha−1 y−1 for soil calcium, carbon, nitrogen, potassium, magnesium, and phosphorus, respectively, was found from the landforms. Significantly strong relationships between NE and sediment yield in the landforms were observed. Annual nutrient replacement costs varied among the landforms though the highest was in the reservoir (€9204 in May 2010). This study thus suggests that while introducing antierosion measures, priority should be given to erosion sources to the reservoir such as mountainous and central ridge landforms.

scholarly journals Assessing sediment enrichment ratio in Mai-Negus catchment, northern Ethiopia

2014 ◽  
Vol 9 (No. 1) ◽  
pp. 38-45 ◽  
Author(s):  
G.B. Tesfahunegn ◽  
P.G.L. Vlek
Keyword(s):  
Soil Nutrients ◽  
Soil Samples ◽  
Limited Resources ◽  
Enrichment Ratio ◽  
Soil Parameters ◽  
Northern Ethiopia ◽  
Soil Particles ◽  
Fine Soil ◽  
Central Ridge ◽  
Field Indicators

Soil degradation is a threat to sustainable development in Ethiopia. However, degradation indicators, such as sediment enrichment ratio (SER), are not adequately documented in literature. This study aims to investigate the SER of different erosion-status sites (aggrading, stable, eroded) in various landforms in Mai-Negus catchment, northern Ethiopia. The erosion-status sites in the landforms were identified using field indicators, and soil samples were collected for analysis of selected soil parameters. In this study, due to the ratio of aggrading to eroded or stable sites at catchment and landform levels, the SER of soil nutrients and fine soil particles was > 1. But due to the ratio of aggrading to eroded sites in the landforms the average SER of the soils were higher (1.42–7.22) as compared to the ratios of aggrading to stable sites (1.10–3.66). The SER significantly (P ≤ 0.05) differed among the landforms, which indicated differences in the effect of erosion. The relationships between the SER of fine soil particles and soil nutrients were strong. Thus, priority for introducing appropriate anti-erosion measures should be given to sources of high SER sites such as the mountainous and central ridge landforms in the catchment using the limited resources available.

scholarly journals Assessment of Available Micronutrients Status in the Soils of Melur Block, Madurai District, Tamil Nadu, Using GIS and GPS Techniques

2021 ◽  
pp. 108-116
Author(s):  
P. Ramamoorthy ◽  
P. Christy Nirmala Mary ◽  
P. Saravanapandian ◽  
A. Gurusamy ◽  
K. Kumutha
Keyword(s):  
Tamil Nadu ◽  
Nutrient Status ◽  
Micronutrient Deficiency ◽  
Soil Samples ◽  
Zn Deficiency ◽  
Soil Resource ◽  
And Zn Deficiency ◽  
Standard Procedures ◽  
Resource Inventory ◽  
Critical Limits

A soil resource inventory was conducted at village level in the Melur block of Madurai district, Tamil Nadu to assess the micronutrients status in the soils and to prepare fertility maps depicting the extent of soil micronutrient deficiency/sufficiency using GIS and GPS techniques. Soil samples were collected at revenue village wise along with geo coordinates and analysed for available micronutrients such as Zn, Fe, Cu and Mn by adopting standard procedures. Based on the nutrient status, the soils were grouped as deficient or sufficient using the critical limits. Per cent deficiency of micronutrients in Melur block was worked out and the thematic maps showing status of different available micronutrients were generated. The results indicated that, Fe and Zn  deficiency is most prevalent in the soils of Melur block  in Madurai district to an extent of more than 35 per cent, followed by Cu (1.1%) and Mn (10%).

Estimation de la fertilité potentielle des ferralsols par la couleur

2009 ◽  
Vol 89 (3) ◽  
pp. 331-342 ◽  
Author(s):  
B. Koné ◽  
S. Diatta ◽  
O. Sylvester ◽  
G. Yoro ◽  
C. Mameri ◽  
...  
Keyword(s):  
Discriminant Analysis ◽  
Regression Models ◽  
Soil Management ◽  
Soil Samples ◽  
Chemical Components ◽  
Soil Color ◽  
Relative Contribution ◽  
Physico Chemical ◽  
Multiple Regression Models ◽  
Potassium Magnesium

A farmer-friendly method of determining the most suitable cultivation soils would help in transferring new integrated soil management technologies. The potential for using soil color (Munsell data) was tested by physico-chemical analysis of 1028 ferrallitic soil samples from 289 profiles unequally allocated above 7 deg N in Côte d’Ivoire. Soil hue variations in depth and along the toposequence revealed the existence of vertical and lateral gradients of soil hue. The relative contribution of the different descriptors (clay, sand, carbon, total nitrogen, total phosphorus, potassium, magnesium and calcium) to the three functions extracted using a discriminant analysis to differentiate the four groups of soils with different hues was evaluated as well as the analysis of variance to determine the possible groups number for each one of the descriptors. Differences between physico-chemical components of red (2.5YR and 5YR) and yellow (7.5YR and 10YR) soils were determined, especially for P, Mg and K in extension. A decreasing gradient of inherent soil fertility indicators with an increasing yellowness in soil hue was revealed using multiple regression models. The soils 2.5YR and 5YR were therefore deemed more appropriate for stable and sustainable agriculture.Key words: Hue, ferralsols, fertility, soil use

scholarly journals Yellow Sap Contamination on Mangosteen (Garcinia mangostana L.) Fruit in Relation to Soil Calcium Contents and Plant Tissue

2021 ◽  
pp. 1-10
Author(s):  
. Martias ◽  
Titin Purnama ◽  
. Riska ◽  
. Affandi ◽  
Sri Yuliati ◽  
...  
Keyword(s):  
Plant Tissue ◽  
Sampling Method ◽  
Soil Samples ◽  
Site Location ◽  
Garcinia Mangostana ◽  
Fruit Flesh ◽  
Soil Calcium ◽  
West Sumatra ◽  
The Relationship ◽  
Leaf Part

Yellow sap contamination (YSC) is one of the mangosteen quality constrain in Indonesia. Calcium is the prominent nutrient that influence the incidence of yellow sap contamination. A research with objective to observe the relationship between incidence YSC and Ca availability in soil as well as plant tissue was done in ten locations in West Sumatra, Lampung and West Java provinces. Purposive random sampling method was used to determine the site locations. The plant and soil samples were collected from 10 sites and ten tree per sites. Correlation analysis was used to measure the relationship between incidence YSC and Ca content in fruit endocarp, mesocarp, peel, soil and leaf. The result showed that there was a variation of incidence YSC in site location with range of 8.7%−54.04%; 4.0−51.6%; and 17.7−78.6% for percentage of YSC in fruit flesh, segmentation and peel, respectively. Ca content in soil, endocarp, mesocarp and leaf were given significantly negative correlation toward incidence YSC in fruit flesh and segmentation. Ca content in leaf part correlates significantly to Ca availability in soil, endocarp and mesocarp. Ca content in leaf in the range of 1.40- 1.70% indicates YSC less than 10%.

scholarly journals Spatial variation in biodiversity, soil degradation and productivity in agricultural landscapes in the highlands of Tigray, northern Ethiopia

Food Security ◽  
2009 ◽  
Vol 1 (1) ◽  
pp. 83-97 ◽  
Author(s):  
Kiros M. Hadgu ◽  
Walter A. H. Rossing ◽  
Lammert Kooistra ◽  
Ariena H. C. van Bruggen
Keyword(s):  
Spatial Variation ◽  
Soil Degradation ◽  
Agricultural Landscapes ◽  
Northern Ethiopia

scholarly journals Status of available sulphur and cationic micronutrients in cultivated soils of Banaskantha district of Gujarat

2018 ◽  
Author(s):  
Dipali Desai ◽  
B T Patel ◽  
Neha Chaudhary ◽  
Praveen Thakur
Keyword(s):  
Mean Value ◽  
Soil Samples ◽  
Standard Procedures ◽  
Nutrient Index ◽  
Very High ◽  
Cultivated Soils

In order to assess the available sulphur and micronutrients (Fe, Mn, Zn and Cu) status in soils of Banaskantha district of Gujarat, five hundred and fifty six representative surface (0-15cm) soil samples were collected from farmer’s field of each taluka of Banaskantha district. All the collected soil samples were analyzed for available sulphur and DTPA-extractable cationic micronutrients (Fe, Mn, Zn and Cu) as per standard procedures. The available S content in soils of Banaskantha district varied from 4.98 to 66.89 mg kg-1 with a mean value of 15.49 mg kg-1. The DTPA- extractable Fe, Mn, Zn and Cu were in the range of 2.74 to 21.98; 4.22 to 25.02; 0.20 to 2.76 and 0.12 to 3.16 mg kg-1 with a mean value of 6.72, 10.15, 0.60 and 0.60, respectively. The overall nutrient index values were marginal for available S (1.82) and DTPA-extractable Fe (1.84) and Zn (1.74); high for DTPA-extractable Mn (2.40) and very high for Cu (2.75).

scholarly journals Study of the Physical Aspects of Residential Soils of Iranduba - AM

2019 ◽  
Vol 7 (10) ◽  
pp. 82-89
Author(s):  
Rômulo De Araújo Reis ◽  
Bruna Moraes de Oliveira ◽  
Lívia Da Silva Oliveira ◽  
David Barbosa de Alencar
Keyword(s):  
Moisture Content ◽  
High Precision ◽  
Specific Weight ◽  
Soil Samples ◽  
Grain Weight ◽  
Physical Characterization ◽  
Saturation Degree ◽  
Standard Procedures

The objective of this work is to study the physical indices of soil samples collected in different points of the municipality of Iranduba - Am. The parameters analyzed were moisture content, porosity, aeration degree, specific weight among others. For the physical characterization of the soil, samples with deformed structure were collected, prepared according to procedures described in the standard procedures described by the NBR 6457 standard (ABNT, 1986). The tests were performed using a high precision glass pycnometer. The tests resulted in samples with high voids and porosity, lower values ​​of saturation degree as their low percentage. The specific grain weight presented satisfactory results meeting the criteria established by the standard.

scholarly journals EVALUASI SIFAT FISIKA TANAH TYPIC HAPLUDULTS PADA EMPAT GENERASI TANAM KELAPA SAWIT PT SOCFIN INDONESIA DI KEBUN AEK LOBA KABUPATEN ASAHAN

2017 ◽  
Vol 4 (2) ◽  
pp. 106-113
Author(s):  
Edison Parulian Sihombing Sihombing
Keyword(s):  
Oil Palm ◽  
Soil Degradation ◽  
Soil Samples ◽  
Physical Characteristics ◽  
Soil Profiles ◽  
Best Management ◽  
Palm Trees ◽  
Mixed Crop ◽  
Soil Physical Characteristics

Charges against oil palm plantations as the cause of soil degradation and as a ringleader ofenvironmental damage, drought land and take nutrients in large quantities make this studyimportant. The purpose of this study to determine the effect of oil palm cultivation on the four-generation of sustainable planting to changes in soil physical characteristics Typic hapludults. Description of soil profiles and sampling was conducted at four sites representinggenerations of planting oil palm. As the control mixed crop that has not been planted with oilpalm. Soil samples tested in the laboratory for each of the characteristics of soil physics.Results showed oil palm cultivation in soil Typic hapludults for four generations of plantscontinuously unchanged physical characteristics significant level. This shows that thecultivation of oil palm trees in a sustainable manner with the best management practicesystems PT Socfindo can maintain the physical characteristics of the soil.

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