scholarly journals Structure Stability of Cultivated Soils from Semi-Arid Region: Comparing the Effects of Land Use and Anionic Polyacrylamide Application

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2010
Author(s):  
Amrakh I. Mamedov ◽  
Atsushi Tsunekawa ◽  
Mitsuru Tsubo ◽  
Haruyuki Fujimaki ◽  
Imanverdi Ekberli ◽  
...  
Keyword(s):  
Land Use ◽  
Arid Region ◽  
Soil Structure ◽  
Water Retention ◽  
Soil Management ◽  
High Energy ◽  
Structure Stability ◽  
Clay Loam ◽  
Semi Arid Region ◽  
Semi Arid

The Sustainable Development Goals of the United Nations call for applying soil management practices that contribute land degradation neutrality. Our objectives were to investigate the effect of (i) soil management—conventional tillage (CT under crop) and no-tillage (NT under grass)—and (ii) an amendment (polyacrylamide (PAM)) application on the structure stability indices of soils from a semi-arid region. Two sets of experiments were conducted using the high-energy moisture characteristic (HEMC) method for the assessment of (i) land-use type (CT vs. NT) in soils (30 samples) varying in texture, and (ii) the effect of six PAM concentrations (0, 10, 25, 50, 100, and 200 mg L−1) on three typical soils (sandy clay loam, clay loam, and clay) under CT management; then, the contributions of PAM concentration (CT) and NT were compared. Water retention curves of samples were obtained at a matric potential from 0 to −5.0 J kg−1 and characterized by a modified van Genuchten model that yields (i) model parameters α and n, and (ii) a soil structure stability index (SI). The treatments affected the shape of the water retention curves. Change of land use from CT to NT and PAM application to CT soil increased the SI and ɑ, and decreased n compared to CT-managed soils. The magnitude of the NT and PAM effect was inversely related to soil clay content. CT-managed soils treated with a low PAM rate (10–25 mg L−1) gave SI comparable to that obtained for the NT-managed soils, while CT-managed soils treated with a high PAM rate (50–200 mg L−1) yielded 1.3–2.0 and 2–4 times higher SI than that for NT and CT-managed soils, respectively. Our findings suggest that both the change of land use to NT or the addition of small amounts of PAM are viable alternatives for stabilizing CT-managed weakly alkaline semi-arid soils, whose soil structure stability is a priori limited.

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 organic carbon temperature sensitivity of different soil types and land use systems in the Brazilian semi‐arid region

2019 ◽  
Vol 35 (3) ◽  
pp. 433-442 ◽  
Author(s):  
Stoécio Malta Ferreira Maia ◽  
Giordano Bruno Medeiros Gonzaga ◽  
Leilane Kristine dos Santos Silva ◽  
Guilherme Bastos Lyra ◽  
Tâmara Cláudia de Araújo Gomes
Keyword(s):  
Land Use ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Temperature Sensitivity ◽  
Arid Region ◽  
Soil Types ◽  
Land Use Systems ◽  
Semi Arid Region ◽  
Semi Arid

Soil carbon losses in conventional farming systems due to land-use change in the Brazilian semi-arid region

2020 ◽  
Vol 287 ◽  
pp. 106690 ◽  
Author(s):  
Aldair de Souza Medeiros ◽  
Stoécio Malta Ferreira Maia ◽  
Thiago Cândido dos Santos ◽  
Tâmara Cláudia de Araújo Gomes
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Soil Carbon ◽  
Arid Region ◽  
Farming Systems ◽  
Conventional Farming ◽  
Semi Arid Region ◽  
Carbon Losses ◽  
Semi Arid

Spatial and temporal dynamics of soil moisture for surfaces with a change in land use in the semi-arid region of Brazil

CATENA ◽  
2020 ◽  
Vol 188 ◽  
pp. 104457 ◽  
Author(s):  
Maria Gabriela de Queiroz ◽  
Thieres George Freire da Silva ◽  
Sérgio Zolnier ◽  
Alexandre Maniçoba da Rosa Ferraz Jardim ◽  
Carlos André Alves de Souza ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Moisture ◽  
Arid Region ◽  
Temporal Dynamics ◽  
Spatial And Temporal Dynamics ◽  
Semi Arid Region ◽  
Semi Arid

A Study of Change in Agricultural and Forest Land in Gwalior City Using Satellite Imagery

2017 ◽  
Vol 9 (02) ◽  
pp. 109-112
Author(s):  
Padam Jee Omar ◽  
Nitesh Gupta ◽  
Ravi Prakash Tripathi ◽  
Shiwanshu Shekhar ◽  
Surender .
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Land Cover ◽  
Arid Region ◽  
Local Population ◽  
High Rate ◽  
Semiarid Region ◽  
Change Analysis ◽  
Semi Arid Region ◽  
Semi Arid

The relative evaluation of land use and land cover for various uses such as forest, agriculture and water bodies etc. is the important issue in the semiarid region. Application of Remote Sensing technology for Land Use and Land Cover (LULC) change analysis has been carried out in semi-arid region of Madhya Pradesh, central part of India and found that the use of remote sensing along with Survey of India toposheets could be used appropriately for LULC mapping. The semi-arid regions are characterized by erratic rainfall and high rate of vegetation dynamics. The increasing biotic pressure together with increasing human demands exerts pressure on the available land resources all over the region. Therefore, in order to have best possible use of land, it is not only necessary to have the information on the existing LULC, but also to monitor the dynamic land use resulting because of increasing demands aroused from the growing population. Continuous overexploitation of natural resources like land, water, and forest has caused serious threat to the local population of the semi-arid region. This causes problems like little scope for soil moisture storage, high rate of soil erosion, declining groundwater level and shortage of drinking water

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