Effects of land use and reducing conditions of paddy fields on soil quality and high energy moisture characteristic structural stability indices in North of Iran

2021 ◽  
Author(s):  
Fatemeh Pishnamaz Amoli ◽  
Mohammad Reza Mosaddeghi ◽  
Naser Davatgar ◽  
Elham Chavoshi ◽  
Hossein Torabi Golsefidi
Keyword(s):  
Land Use ◽  
Soil Quality ◽  
Structural Stability ◽  
High Energy ◽  
Paddy Fields ◽  
Reducing Conditions ◽  
North Of Iran ◽  
Moisture Characteristic ◽  
Effects Of Land Use ◽  
Stability Indices

Land Use Change Effects on Soil Quality in Prince Edward County, ON

2018 ◽  
Author(s):  
Kelsey Watts
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Land Use Change ◽  
Bulk Density ◽  
Soil Quality ◽  
Water Holding Capacity ◽  
Total Carbon ◽  
Prince Edward County ◽  
Effects Of Land Use ◽  
Water Holding

Soils play a critical role to society as a medium that facilitates crop production and also contributes to the energy and carbon balance of the Earth System. Land-use change and improper land-use is one of the dominant factors affecting soil erosion and nutrient loss in soils. We examined the effects of land-use change on an Elmbrook clay/clay-loam soil on a farm in Ameliasburg on the northern part of Prince Edward County. Three cover types were examined: a sod field (established for over 10 years), a wheat field (part of a wheat/corn/soybean rotation for 30 years) and an undisturbed deciduous forest. Under each land-use type, cores to a depth of 40 cm were collected along three random 30 m transects (at 8, 16 and 24 m), then divided them into 10 cm increments, combining all similar depth increments along one transect. Soil quality was assessed by analyzing various soil physical and chemical properties. Bulk density of the soil was much higher (1.55 vs. 0.95 g/cm3) in both agricultural ecosystems compared to the forest, but only in the 0-10 cm layer. Soil moisture at 60% water holding capacity was much greater for the forest than the sod and wheat soils. Soil pH was slightly lower in the forest compared to the sod and wheat fields. The sod and wheat fields showed losses of ~52% and ~53% organic matter, respectively, in contrast to the forested area. The greatest differences in organic matter and total carbon were found in the top 10 cm, likely due to the greater accumulation of litter at the ground surface in the forest compared to the agricultural sites. It appears that long-term (10 year) agricultural production has led to a decline in some, but not all, soil quality measures, particularly soil organic matter, bulk density and water holding capacity. These findings are consistent with much of the literature concerning the effects of land-use change on soil quality, and highlight the need to develop improved management systems to minimize losses in soil quality that can lead to declines in the productivity potential of soils over time.

Effects of Land Use Change on Soil Quality Indicators in Forest Landscapes of the Western Amazon

Soil Science ◽  
2017 ◽  
Vol 182 (4) ◽  
pp. 128-136 ◽  
Author(s):  
Santiago Bonilla-Bedoya ◽  
Magdalena López-Ulloa ◽  
Tom Vanwalleghem ◽  
Miguel Ángel Herrera-Machuca
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Soil Quality ◽  
Quality Indicators ◽  
Soil Quality Indicators ◽  
Effects Of Land Use

scholarly journals Response of Potential Indicators of Soil Quality to Land-Use and Land-Cover Change under a Mediterranean Climate in the Region of Al-Jabal Al-Akhdar, Libya

2021 ◽  
Vol 14 (1) ◽  
pp. 162
Author(s):  
Jamal Suliman Alawamy ◽  
Siva K. Balasundram ◽  
Ahmad Husni Mohd. Hanif ◽  
Christopher Teh Boon Sung
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Soil Properties ◽  
Soil Quality ◽  
Quality Indicators ◽  
Land Management ◽  
Rainfed Agriculture ◽  
Soil Quality Indicators ◽  
Al Jabal Al Akhdar ◽  
Effects Of Land Use

Conversion of native lands into agricultural use, coupled with poor land management practices, generally leads to changes in soil properties. Understanding the undesirable effects of land-use and land-cover (LULC) changes on soil properties is essential when planning for sustainable land management. This study was conducted in Al Jabal Al Akhdar region, Libya, to assess the effects of land-use and land-cover changes on soil quality inferred by analyzing the relative changes in 17 chemical, physical, and biological soil properties in the upper layer (0–20 cm) of disturbed and undisturbed soil systems. Soil samples were collected from 180 sampling sites with 60 from each of the three types of LULC prevalent in the study area: natural Mediterranean forests (NMF), rainfed agriculture (RA), and irrigated crops (IC). The soil properties of the two agricultural land uses were compared with soil properties under an adjacent natural forest, which served as a control to assess changes in soil quality resulting from the cultivation of deforested land. The results indicate significant reductions in most soil quality indicators under rainfed agriculture as compared to native forest land. Under irrigated agriculture, there were significant changes (p ≤ 0.05) in most of the soil quality indicators, generally, indicating a significant reduction in soil quality, except for improvement of nitrogen and phosphorus levels due to frequent fertilizer application. Our data support the notion that changes in land use and land cover, in the absence of sustainable management measures, induce deterioration of soil properties and ultimately may lead to land degradation and productivity decline.

Effects of land use and topography on spatial variety of soil organic carbon density in a hilly, subtropical catchment of China

Soil Research ◽  
2017 ◽  
Vol 55 (2) ◽  
pp. 134 ◽  
Author(s):  
Huanyao Liu ◽  
Jiaogen Zhou ◽  
Qingyu Feng ◽  
Yuyuan Li ◽  
Yong Li ◽  
...  
Keyword(s):  
Land Use ◽  
Environmental Factors ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Paddy Fields ◽  
Accurate Estimation ◽  
Carbon Density ◽  
Topographic Wetness Index ◽  
Soil Organic Carbon Density ◽  
Effects Of Land Use

A good understanding the effects of environmental factors on the spatial variety of soil organic carbon density (SOCD) helps achieve a relatively accurate estimation of the soil organic carbon stock of terrestrial ecosystems. The present study analysed the SOCD of 1033 top soil samples (0–20cm) from the Jinjing catchment located in subtropical China. Spatial variability of SOCD was estimated using a geostatistics method and a geographically weighted regression (GWR) model, and the major environmental factors affecting SOCD were also explored. In the present study, SOCD had a moderate spatial dependence and the best-fitting model was exponential with a nugget-to-sill ratio of 60.72% and a range of 182m. Land use types (woodlands, paddy fields and tea fields) and topography (elevation, slope, topographic wetness index (TWI)) affected the spatial variation of SOCD. Mean SOCD in the paddy fields was higher than in woodland and tea fields (3.50 vs 3.24 and 2.81kgCm–2 respectively; P<0.05). In addition, SOCD was generally higher in the valleys of paddy fields (with low slope and high TWI) and the hills of woodland (with high elevation and increased slope). GWR generated the spatial distribution of SOCD more accurately than ordinary kriging, inverse distance weighted, multiple linear regression model, and linear mixed-effects model. The results of the present study could enhance our understanding of the effects of land use and topography on SOCD, and improve the accuracy in predicting SOCD by GWR in small catchments of complex land use and topography.

scholarly journals Soil Structure Stability under Different Land Uses in Association with Polyacrylamide Effects

2021 ◽  
Vol 13 (3) ◽  
pp. 1407
Author(s):  
Amrakh I. Mamedov ◽  
Atsushi Tsunekawa ◽  
Nigussie Haregeweyn ◽  
Mitsuru Tsubo ◽  
Haruyuki Fujimaki ◽  
...  
Keyword(s):  
Land Use ◽  
Structural Stability ◽  
Soil Structure ◽  
Water Retention ◽  
High Energy ◽  
Structure Stability ◽  
Model Parameters ◽  
Retention Model ◽  
Watershed Land Use ◽  
Soil Structural Stability

Soil structural stability is a vital aspect of soil quality and functions, and of maintaining sustainable land management. The objective of this study was to compare the contribution of four long-term land-use systems (crop, bush, grass, and forest) coupled with anionic polyacrylamide (PAM = 0, 25, and 200 mg L−1) application on the structural stability of soils in three watersheds of Ethiopia varying in elevation. Effect of treatments on soil structural stability indices were assessed using the high energy moisture characteristic (HEMC, 0–50 hPa) method, which provides (i) water retention model parameters α and n, and (ii) soil structure index (SI). Soil (watershed), land use and PAM treatments had significant effects on the shape of the water retention curves (α, n) and SI, with diverse changes in the macropore sizes (60–250; >250 μm). Soil organic carbon (SOC) content and SI were strongly related to soil pH, CaCO3 soil type-clay mineralogy, exchangeable Ca2+, and Na+ (negatively). The order of soil SI (0.013–0.064 hPa−1) and SOC (1.4–8.1%) by land use was similar (forest > grass > bush > cropland). PAM effect on increasing soil SI (1.2–2.0 times), was inversely related to SOC content, being also pronounced in soils from watersheds of low (Vertisol) and medium (Luvisol) elevation, and the cropland soil from high (Acrisol) elevation. Treating cropland soils with a high PAM rate yielded greater SI (0.028–0.042 hPa−1) than untreated bush- and grassland soils (0.021–0.033 hPa−1). For sustainable management and faster improvement in soil physical quality, soil properties, and land-use history should be considered together with PAM application.

Soil quality change 50 years after forestland conversion to tea farming

Soil Research ◽  
2018 ◽  
Vol 56 (5) ◽  
pp. 509 ◽  
Author(s):  
Azadeh Gholoubi ◽  
Hojat Emami ◽  
Amin Alizadeh
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Land Use Change ◽  
Soil Quality ◽  
Crop Production ◽  
Management Practices ◽  
Limiting Factor ◽  
Soil Productivity ◽  
Northern Iran ◽  
Effects Of Land Use

Land-use change has been shown to affect soil quality and may lead to soil degradation. The effects of land-use change from natural forest to tea farming on soil properties and quality were studied within Guilan Province of northern Iran. Thirty-six soil samples (0–30 cm) were randomly collected from six sites with three replications at each site. The soil quality of forest and tea farms was determined using the cumulative rating (CR) index and the Cornell Comprehensive Assessment of Soil Health (CASH) scoring function. Effects of land-use change on soil quality or health were significant (P < 0.01) using both methods. Both methods for all regions (forest and tea fields) showed that forest land-use was more sustainable based on lower CR (lower limitation to crop production) and higher CASH scores (higher soil productivity and quality) than tea farm soils. Both methods were also negatively correlated with each other. Despite pH being a limiting factor for soil quality, it was not influenced by land-use change in most locations because the studied soils were acidic. However, organic carbon was the most important soil quality indicator, which was significantly correlated with soil physical, chemical and biological (respiration rate) properties. Therefore, land-use management practices that are continuously cultivated should include increases in organic carbon.

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