scholarly journals Effect of Slope Aspect and Land Use Types on Selected Soil Physicochemical Properties in North Western Ethiopian Highlands

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Gebretsadik Melak Tamene ◽  
Hailu Kindie Adiss ◽  
Melese Yigzaw Alemu
Keyword(s):  
Land Use ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Bulk Density ◽  
Soil Ph ◽  
Soil Samples ◽  
Slope Aspect ◽  
Strong Positive Correlation ◽  
Soil Physicochemical Properties ◽  
Land Use Types

Recent research findings imply that the slope aspect has a great impact on soil genesis and soil microclimate. The microclimate has a significant effect on the soil geobiochemical processes taking place in the soil. However, the slope aspect impact on soil properties has not been yet studied well in Ethiopia, particularly in the northern highlands. This research was initiated to link selected soil physicochemical properties with slope aspects under different land use practices. The research was conducted in Gumara-Maksegnit watershed located at the upper Lake Tana basin, Ethiopia. Four slope aspects, eastward (Ew), northward (Nw), southward (Sw), and westward (Ww), and three land use types at each slope aspect, cropland (Cl), forest land (Fl), and grazing land (Gl), were considered. In total, 36 undisturbed soil samples for bulk density and 36 disturbed soil samples for selected soil properties were collected. Soil particle size (texture), bulk density, electrical conductivity (EC), soil pH, available phosphorus (av. P), available potassium (av. K), total nitrogen (TN), and soil organic carbon (SOC) were analyzed. The resulting analyses showed no significant variation (p<0.05) across both slope aspects and/or land use types for soil pH and EC, whereas the slope aspect showed a significant effect (p<0.05) on SOC, TN, av. K, and av. P. The highest significant (p<0.05) mean value of SOC was observed in the Ww (3.04%) followed by Nw (2.52%) but SOC was not significant (p<0.05) between Sw and Ew. While the highest av. K (1233.2 centimole/kilogram) and av. phosphorus (35.76 ppm) were observed in Nw slope aspect, the highest TN was in the Ww slope aspect (0.24%). The significant effect (p<0.05) of land uses can be summarized as Fl > Gl > Cl for SOC and TN. A strong positive correlation was observed between SOC and TN (R2 = 0.997) and av. K and av. P (R2 = 0.58) at p<0.05. Generally, the slope aspect, land use types, and their interaction had a significant effect on soil physicochemical properties.

scholarly journals Effects of landscape positions on soil physicochemical properties at Shenkolla Watershed, South Central Ethiopia

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Belayneh Bufebo ◽  
Eyasu Elias ◽  
Getachew Agegnehu
Keyword(s):  
Land Use ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Bulk Density ◽  
Landscape Position ◽  
Soil Reaction ◽  
Soil Physicochemical Properties ◽  
Cultivated Land ◽  
Forest Land ◽  
Land Use Types

Abstract Background Understanding the effects of landscape positions on soil physicochemical properties is crucial for improving the soil productivity and to ensure the environmental sustainability. Three land use types forest land, grazing land and cultivated land all within upper, middle and lower landscape positions were selected to determine the effects of landscape positions, land use types and their interaction effects on soil physicochemical properties. Twenty seven soil samples were collected from lower landscape, middle landscape and upper landscape positions at the depth of 0–20 cm in nine replications. In addition, undisturbed soil samples were taken using core sampler from each land use type under upper, middle and lower landscape positions for the ascertainment of bulk density and water retentive capacity. The analysis of variance (ANOVA) was applied to determine variations in soil parameters among landscape positions and land use types. A Generalized Linear Models (GLMs) analysis was conducted to determine the influence of independent (fixed) factors, on the soil properties (response variables). Treatment means comparison was determined using the Least Significant Difference (LSD) at 0.05 level of significances. Results The result indicated that among the soil properties sand (p < 0.001), silt (p < 0.001), clay (p < 0.001), bulk density (p < 0.01), water holding capacity at FC (p < 0.001), water retention at PWP (p < 0.01), Available water content (AWC) (p < 0.01), soil reaction (pH) (p < 0.05), Soil organic carbon (SOC%) (p < 0.01), Total nitrogen (TN%) (p < 0.01), available phosphorus (p < 0.05) and CEC (p < 0.001) have shown a significant variation among the landscape categories. Similarly, variation of sand (p < 0.001), silt (p < 0.001), clay (p < 0.001), bulk density (p < 0.01), water holding capacity at FC (p < 0.001), water retention at PWP (p < 0.001), Available water content (AWC) (p < 0.01), soil reaction (pH) (p < 0.01), SOC (p < 0.01), TN (p < 0.001) available phosphorus (AP) (p < 0.001) and CEC (p < 0.001) were also statistically significant among the land use types. Moreover, lower landscape position and forest land had high mean value of SOC, TN, AP, CEC, EB (exchangeable bases), and available micronutrients, whereas upper landscape position and intensively cultivated land had low mean value of SOC, TN, AP, CEC, EB (exchangeable bases), and available micronutrients. Conclusion Landscape positions, land use types and interaction effects of landscape position and land use types (LSP * LU) significantly affected soil properties. Soil with best quality was found in lower landscape position and forest land, while less quality of soil was found in upper landscape position and cultivated land. Thus, efforts should be made to improve the quality of soil under upper landscape position and cultivated land using biological and physical soil conservation measures.

scholarly journals Assessment of fertility status of soils under land use types in Egbema Area, Imo State, Nigeria

2020 ◽  
Vol 17 (2) ◽  
pp. 1-13
Author(s):  
C. Chikere-Njoku
Keyword(s):  
Land Use ◽  
Bulk Density ◽  
Soil Ph ◽  
Oil Palm ◽  
Fallow Land ◽  
Cultivated Land ◽  
Fertility Status ◽  
Oil Palm Plantation ◽  
Land Use Types ◽  
Land Use System

The study was conducted to investigate fertility status under four different land use types (oil palm plantation, pineapple orchard, cassava cultivated land and fallow land use system) in Umuekem, Ohaji/Egbema of Imo State, Nigeria. Composite samples were collected from various depths (10-15cm, 15-30cm, 30-45cm) across these land use patterns and analyzed in the laboratory using the standard procedure. Data generated were subjected to statistical analysis. Results obtained showed significant differences (p ≥ 0.05) in silt-clay ratio, bulk density, total porosity, water holding capacity, soil pH, organic carbon, available phosphorus, TN and ECEC across the four land use types studied. The soils were predominantly loamy sand surface and sandy clay loam in the subsoil exception of pineapple orchard with sandy loam topsoil over sandy clay loam subsoil. The silt clay ratio (SCR) showed ranges of 0.10-0.30, 0.10-0.36, 0.07 – 0.30, and 0.06- 0.20 in land use types of oil palm plantation, pineapple orchard, cassava cultivated land and fallow land respectively. The bulk density ranged of (1.61 – 1.77 g/cm3) for oil palm, (1.34 – 1.58 g/cm3) for pineapple (1.42 – 1.49 g/cm3) cassava and (1.45 – 1.48 g/cm3) in forest land use system. The soils of the four land use types were generally acidic. The mean values of soil pH (H20) were oil palm plantation (5.11), pineapple orchard (5.03), cassava cultivated land (5.35) and fallow land (5.40). The soil pH recorded low variation in all the land use types. The organic carbon and total nitrogen recorded high variation (>52.57% < 85.67%, >79.19 < 95.77) in all the different land use types. Calcium-magnesium ratio (Ca: Mg) recorded high variation (37.36%) in forest land use system, low variation (18.77%) in pineapple orchard and moderate in cassava (27.51%) and oil palm plantation (28.23). The low Ca: Mg ratio inhibits uptake and causes Ca deficiency thereby resulting in low fertility status of the soil. C: P recorded high variation (≥ 53.77% ≤ 77.73%) in all the studied land use types. O.C correlated positively and highly significant with available phosphorus, ECEC and T.N. The findings also indicated that bulk density correlated positively with ECEC and percentage base saturation. It is recommended that land use approach should be adopted for effective and sustainable management of the soil fertility. Keywords: Fertility status, Soils, Land use types

scholarly journals Changes in physico-chemical properties of paddy soil due to water and fertilizer management

2020 ◽  
Vol 5 (2) ◽  
pp. 65-71
Author(s):  
Israt Jahan ◽  
AKM Abul Ahsan ◽  
MMR Jahangir ◽  
Mahmud Hossain ◽  
Md Anwarul Abedin
Keyword(s):  
Organic Matter ◽  
Soil Properties ◽  
Bulk Density ◽  
Total Nitrogen ◽  
Soil Ph ◽  
Crop Production ◽  
Soil Health ◽  
Chemical Properties ◽  
Soil Samples ◽  
Physico Chemical

Soil physico-chemical properties are an important phenomenon for sustainable crop production and maintenance of optimum soil health. Hence, a laboratory measurement was conducted with soil samples of three years long experimental field of the Department of Soil Science, Bangladesh Agricultural University, Mymensingh to assess the changes in five selected soil physico-chemical properties viz. soil texture, bulk density, soil pH, total nitrogen and organic matter. The experiment was laid out in a split plot design with two water regimes (continuous flooding and alternate wetting & drying) in the main plots and five fertilizer treatments (N0 - control, N1- 140 kg N/ha as PU, N2- 104 kg N/ha as USG (2× 1.8 g/ 4 hills), N3 - 5 t CD + PU @ 140 kg N /ha on IPNS basis and N4- 5 t CD + USG (2× 1.8 g/ 4 hills @ 104 kg N/ha)) in the subplots under rice-rice cropping pattern with three replications. After three years, soil samples were collected at 0-5 and 5-10 cm soil depths for measuring bulk density and at 0-10 cm depth for other soil properties and analyzed. Results found that % sand, % silt, % clay, bulk density and soil pH was not changed significantly compared to initial status. Percentage of total nitrogen and organic matter was significantly affected by irrigation and fertilization. Total nitrogen (%) was higher in AWD whereas organic matter (%) was higher in CF practice. The highest total nitrogen (%) and organic matter (%) was found in N4 treatment in which USG was applied in combination with cowdung as organic manure. It can be suggested that N4 treatment was formed good combination for sustaining chemical properties of soil. Further long- term experimentation will be needed to know the changes in soil properties for sustainable crop production and improving soil health. Asian Australas. J. Biosci. Biotechnol. 2020, 5 (2), 65-71

scholarly journals Assessing Impacts of Different Land Use Types on Soil Properties ın Asa and Moro Local Government Area, Kwara State, Nigeria

2021 ◽  
Vol 5 (4) ◽  
pp. 1014-1029
Author(s):  
Folasade Mary OWOADE ◽  
Abolakale Olaolu ABOLARIN
Keyword(s):  
Land Use ◽  
Local Government ◽  
Soil Properties ◽  
Bulk Density ◽  
Sustainable Use ◽  
Natural Forest ◽  
Basic Knowledge ◽  
Continuous Cropping ◽  
Land Use Types ◽  
Short Period

Successful agriculture requires the sustainable use of soil resource, because soil can easily lose its quality and quantity within a short period of time. Agricultural practices, therefore, needed basic knowledge of sustainable use of land.           This research was conducted in Asa and Moro Local Government Areas of Kwara State to assess the impacts of different land use types on soil properties in the study area. Six villages noted for farming were randomly visited and in each village, three farms planted each with maize-cassava intercrop, cashew plantation and natural forest were sampled at 0-20 cm depth for laboratory analysis of particle size, pH, carbon, nitrogen, phosphorus, exchangeable cations and extractable micronutrients. The bulk density at 0-5 cm, 5-10 cm and 10-15 cm depths were determined. Soil properties were analysed using descriptive statistics. The soil texture was sandy loam with soil pH ranging from slightly acid to acid (6.4 to 5.1). Irrespective of the local government areas and land use, organic carbon (1.83 g kg-1), Sodium (0.12 cmol kg-1), Nitrogen (0.12 g kg-1) and Phosphorus (6.15 mg kg-1) were low while Fe (134.80 mg kg-1), Mn (122.80 mg kg-1) and Zn (19.22 mg kg-1) were high. Across the local government areas, Potassium and Magnesium varied from medium to high while Calcium and Copper were low to medium. The bulk density range was medium to high (1.36 to 1.57 g cm-3) for cashew plantations and maize-cassava intercrop while it was medium (1.40 to 1.47 g cm-3) for natural forest. In conclusion, most of the cultivated soils were low in fertility, with low carbon stocks which is assumed to be due to emission losses arising from continuous cropping. The carbon sequestration status of land uses in the study area was very low. Management practices like composting, green manuring, use of organic fertilizer and residue retention is recommended.      

scholarly journals Effects of Tree Forest Plantations on Soil Physicochemical Properties in the Arboretumof Ruhande,Southern Province of Rwanda

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Nsengimana Venuste
Keyword(s):  
Organic Carbon ◽  
Physicochemical Properties ◽  
Cation Exchange ◽  
Bulk Density ◽  
Soil Ph ◽  
Tree Species ◽  
Cation Exchange Capacity ◽  
Exchange Capacity ◽  
Available Phosphorus ◽  
Soil Physicochemical Properties

Different tree speciesare blamed to have negative effects on soil ecosystems by changing soil physicochemical properties, and hence soil quality. However, few researches to verify this statement were done in Rwanda. This study provides prior information on the effects of planted forest tree species on soil physicochemical properties. It was conducted in the Arboretum of Ruhande, in southern Rwanda. Soil cores were collected in plots of exotic, native and agroforestry tree species. Collected soils were analysed for soil pH, total nitrogen, organic carbon, available phosphorus,  aggregate stability, bulk density, soil humidity, cation exchange capacity, and soil texture. Soils sampled under exotic tree species were acidic, richin soil organic carbon, and in soil available phosphorus. Native and agroforestry tree species offer better conditions in soil pH, soil water content, cation exchange capacity, clay and silt. Less variations in soil total nitrogen and soil bulk density were found in soils sampled under all studied forest types. Research concluded that studiedtree species have different effects on soil physicochemical parameters. It recommended further studies to generalize these findings. Key words: soil, exotic, native, agroforestry, soil properties

scholarly journals Variation of Selected Physicochemical and Hydrological Properties of Soils in Different Tropical Land Use Systems of Nepal

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Sujita Shrestha ◽  
Gandhiv Kafle
Keyword(s):  
Land Use ◽  
Soil Properties ◽  
Bulk Density ◽  
Total Nitrogen ◽  
Sustainable Management ◽  
Soil Samples ◽  
Rainfed Agriculture ◽  
Wise Use ◽  
Land Use Systems ◽  
Agriculture Land

Different land use systems can have different soil properties. It is important to study the soil properties for wise use and sustainable management of land resources. This article reports the findings of a research conducted in Makwanpur district of Nepal, to determine and compare the selected physicochemical and hydrological properties of soil in forest, rainfed agriculture land, and grassland. These forest, agriculture land, and grassland represent tropical land use systems. Soil samples were collected from 0 to 30 cm depths of soil profile from nine randomly distributed pits dug in forest, grassland, and rainfed agriculture land in 2019. Soil samples were analyzed in the laboratory to determine the soil properties using standard methods. Bulk density, porosity, moisture content and infiltration, pH, total nitrogen, available potassium, and available phosphorus were quantified from the soils samples. It was found that the highest BD was found in the grassland (1.29 g/cm³) followed by the forest (1.23 g/cm³) and rainfed agriculture land (1.18 g/cm³). The highest porosity was found in rainfed agriculture land (55.50%) followed by the forest (53.74%) and grassland (51.63%). The highest MC was found in the grassland (26.94%) followed by the forest (10.17%) and rainfed agriculture land (9.92%). The mean cumulative infiltration amount was highest in the rainfed agriculture land (39.27 cm) followed by the forest (33.47 cm) and grassland (8.4 cm). The highest soil pH was found in the grassland (7.91) and the lowest pH (5.70) in the forest. The highest level of total nitrogen was found in rainfed agriculture land (0.121%), followed by the forest (0.106%) and grassland (0.096%). The highest level of available phosphorous was found in rainfed agriculture land (84.94 ppm), followed by the forest (67.76 ppm) and grassland (6.69). The highest level of available potassium was found in rainfed agriculture land (154.24 ppm), followed by the forest (84.49 ppm) and the grassland (44.71 ppm). Bulk density, porosity, and total nitrogen were not found to be significantly different and other soil properties were found to be significantly different between different land use systems. The contribution of farmers in maintaining soil properties on the farmlands is clearly reflected in the results, so their knowledge on soil management needs to be explored and adapted for wise use and sustainable management of other land use systems.

scholarly journals Impact of Rapid and Intensive Land Use/Land Cover Change on Soil Properties in Arid Regions: A Case Study of Lanzhou New Area, China

2020 ◽  
Vol 12 (21) ◽  
pp. 9226
Author(s):  
Runxia Zhang ◽  
Xueyong Zhao ◽  
Chencheng Zhang ◽  
Jing Li
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Physicochemical Properties ◽  
Soil Properties ◽  
Arid Regions ◽  
Land Use Land Cover ◽  
Soil Physicochemical Properties ◽  
Lulc Change ◽  
Native Grassland ◽  
Bare Land

Land use/land cover (LULC) change widely occurs during urbanization and can affect the functionality of soil ecosystems by altering soil physicochemical properties. However, few studies have evaluated the impacts of LULC change on soils in arid regions. This study investigates LULC change patterns during 2010–2017 in Lanzhou New Area, China based on remotely sensed data (Chinese GaoFen-1 and Advanced Land Observing Satellite). We identified five main land use change types and reference native grassland and farmland to determine soil properties at different depths. Principal component analysis and scatter matrix were employed to evaluate the effect of LULC change on soil properties. The results showed that LULC changes that occurred in Lanzhou New Area were characterized by the rapid growth of construction and bare land (increased by 13.06% and 5.97%, respectively) at the expense of farmland (decreased by 25.38%). The conversion of native grassland to artificial grassland and bare land, and farmland to bare land had similar effects on soil properties; i.e., a significant decline and a lower level in total nitrogen and soil organic carbon. The farmland to construction land transition deteriorated soil nutrients and increased soil compaction by both increasing bulk density (BD, mean = 1.63 g cm−3) and enhancing sand content by 69.21%. All land use change types increased BD and decreased soil water content and saturated soil water content when compared to the reference areas. These results indicate that changes in LULC have significant impacts on soil physicochemical properties. Thus, it is essential to optimize land planning and improve soil quality in arid ecosystems to ensure sustainable resource management and ecosystem conservation.

scholarly journals The Effects of Land use Change on the Some Soil Properties in Gbonyin Local Government Area of Ekiti State, Nigeria

2018 ◽  
Vol 1 (2) ◽  
pp. 74-79
Author(s):  
ADEBAYO, W. O. ◽  
OLOFIN, E. O.
Keyword(s):  
Land Use ◽  
Local Government ◽  
Soil Properties ◽  
Chemical Properties ◽  
Soil Samples ◽  
Local Government Area ◽  
Residential Land ◽  
Land Use Types ◽  
Residential Land Use ◽  
Effects Of Land Use

The aim of this research is to examine the response of some soil properties to the changes in land cover/land use in Gbonyin Local Government Area of Ekiti State, Nigeria. Land use changes as a result of human activities have been identified as one of the greatest pressures to soil and forest resources. The change from natural vegetation land use to built-up and agricultural land uses is becoming rampant in Gbonyin Local Government Area of Ekiti State, Nigeria. The objective of this study was to examine the effects of land use change on the some soil properties. Two major land use types which include forest lands and residential lands uses were explored. Soil samples were collected at the depth of 0 on 30cm through the use of soil auger from ten different locations in each of the two land use types in the study area making twenty soil samples. The use of t-test statistical tool was implored on the laboratory results in order to test for the differences between the soil in forest and residential land use types. Results revealed that the soil physico-chemical properties differed significantly between the sites. Chemical properties of the soil were found to be generally low in residential land use while they were high in vegetation land use. Bulk density was high in residential land use while it was low in forest land use.

scholarly journals Effects of Selected Soil and Water Conservation Structures on Soil Physiochemical Properties, Lemo Woreda, Southern Ethiopia

2021 ◽  
Author(s):  
Mulatu Chernet Madolo ◽  
Yohannes Horamo More ◽  
Melese Gogo Masamo
Keyword(s):  
Physicochemical Properties ◽  
Soil Properties ◽  
Water Conservation ◽  
Soil Structure ◽  
Well Being ◽  
Soil Samples ◽  
Control Plot ◽  
Southern Ethiopia ◽  
Soil Physicochemical Properties ◽  
Dispersion Ratio

Soil erosion is now almost universally recognized as a serious threat to man's well-being, if not his very existence. As a result, we assessed the soil physicochemical properties of two possible levels of soil bund and fanya juu. RCBD with three replications was used to collect soil samples from each soil conservation structure. Five composite soil samples were collected from each soil structure based on slop (0-30cm). Soil physicochemical properties such as erosion index, dispersion ratio, and erodibility proportionality ratio were investigated. The effect of different soil structure levels revealed that soil properties differed significantly (P&le;0.05) for all parameters studied. The control plots had significantly higher (P&le;0.05) dispersion ratio, erosion indexes, and erodibility proportionality than the soils treated by the level bund and level Fanya juu structures. On the control plot, this result showed lower clay content and higher sand content. The level of soil bund and fanya juu had a significant (P&le;0.05) effect on soil OC, CEC, OM, and TN, as well as available phosphorous and potassium. As a result, all related soil properties show a positive relative change when the level of soil bund and fanya juu is compared to the control plot. Aside from this result, the dynamic natures of the sciences compel us to conduct additional research based on the agro-ecological zones of the study area.

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