Functional Diversity and Activity of Microbial Communities is Altered by Land Use Management in Agricultural Soil of North-East Slovakia

2021 ◽  
Vol 52 (6) ◽  
pp. 470-478
Author(s):  
L. Bobuľská ◽  
L. Demková
2012 ◽  
Vol 63 (3) ◽  
pp. 8-16
Author(s):  
A.S.I. Hegazy ◽  
A.H. El-Nahry ◽  
M.S. Abd-Elwahed

Abstract This work aims to evaluate Sustainable Land-use Management (SLM) through bio-physics elements (productivity, security and protection) and socio-economic elements (economic viability and social acceptability). The investigated area, 27000 hectares, lies between 31O15² and 32O 00² E and latitudes 31O30² and 30O00² N. To assess SLM, geomorphology and associated soils were identified, the land degradation processes were recognized, then a Sustainable Land use Management Spatial Model (SLMSM) was built and used to assess the sustainable land use management in the study area. The area included three landscapes; fluvio-lacustrine plain, marine plain and flood plain. Four SLM classes were outlined; the relatively high decantation basins representing 62.4% of the agricultural area, the relatively low decantation basins (Class II) occupying 22.5% of the agricultural area, overflow basins (Class III) covering 9.5% of the agricultural area, and Class IV that found in clay flats, sandy remnants, overflow mantle and river terraces occupying 5.6% of the agricultural area.


2017 ◽  
Vol 12 (No. 4) ◽  
pp. 237-245 ◽  
Author(s):  
C. Cheng ◽  
D. Zhao ◽  
D. Lv ◽  
S. Li ◽  
G. Du

We examined the effects of three different soil conditions (orchard soil, cropland soil, unused soil) on the functional diversity of soil microbial communities. The results first showed that orchard and cropland land use significantly changed the distribution and diversity of soil microbes, particularly at surface soil layers. The richness index (S) and Shannon diversity index (H) of orchard soil microbes were significantly higher than the indices of the cropland and unused soil treatments in the 0–10 cm soil layer, while the S and H indices of cropland soil microbes were the highest in 10–20 cm soil layers. Additionally, the Simpson dominance index of cropland soil microbial communities was the highest across all soil layers. Next, we found that carbon source differences in soil layers under the three land use conditions can mainly be attributed to their carbohydrate and polymer composition, indicating that they are the primary cause of the functional differences in microbial communities under different land uses. In conclusion, orchard and cropland soil probably affected microbial distribution and functional diversity due to differences in vegetation cover, cultivation, and management measures.


2017 ◽  
Vol 30 (1) ◽  
pp. 26-41 ◽  
Author(s):  
Jeannie Van Wyk

Our spatial environment is one of the most important determinants of our well-being and life chances. It relates to schools, opportunities, businesses, recreation and access to public services. Spatial injustice results where discrimination determines that spatial environment. Since Apartheid in South Africa epitomised the notion of spatial injustice, tools and instruments are required to transform spatial injustice into spatial justice. One of these is the employment of principles of spatial justice. While the National Development Plan (NDP) recognised that all spatial development should conform to certain normative principles and should explicitly indicate how the requirements of these should be met, the Spatial Planning and Land Use Management Act 16 of 2013 (SPLUMA) contains a more concrete principle of spatial justice. It echoes aspects of both the South African land reform programme and global principles of spatial justice. Essentially section 7(a) of SPLUMA entails three components: (1) redressing past spatial imbalances and exclusions; (2) including people and areas previously excluded and (3) upgrading informal areas and settlements. SPLUMA directs municipalities to apply the principle in its spatial development frameworks, land use schemes and, most importantly, in decision-making on development applications. The aim of this article is to determine whether the application of this principle in practice can move beyond the confines of spatial planning and land use management to address the housing issue in South Africa. Central to housing is section 26 of the Constitution, that has received the extensive attention of the Constitutional Court. The court has not hesitated to criticize the continuing existence of spatial injustice, thus contributing to the transformation of spatial injustice to spatial justice. Since planning, housing and land reform are all intertwined not only the role of SPLUMA, but also the NDP and the myriad other policies, programmes and legislation that are attempting to address the situation are examined and tested against the components of the principle of spatial justice in SPLUMA.


1992 ◽  
Vol 22 (3) ◽  
pp. 199-210 ◽  
Author(s):  
R. D. Perlack ◽  
R. L. Graham ◽  
A. M. G. Prasad

2021 ◽  
Vol 13 (12) ◽  
pp. 6976
Author(s):  
Dimitrios E. Alexakis ◽  
George D. Bathrellos ◽  
Hariklia D. Skilodimou ◽  
Dimitra E. Gamvroula

Karst features such as polje are highly vulnerable to natural and anthropogenic pollution. The main objectives of this study were to investigate the soil quality in the Ioannina polje (north-west Greece) concerning arsenic (As) and zinc (Zn), and delineate their origin as well as compare the As and Zn content in soil with criteria recorded in the literature. For this purpose, the geomorphological settings, the land use, and the soil physicochemical properties were mapped and evaluated, including soil texture and concentrations of aqua-regia extractable As and Zn. The concentration of elements was spatially correlated with the land use and the geology of the study area, while screening values were applied to assess land suitability. The results reveal that 72% of the total study area has a very gentle slope. This relief favors urban and agricultural activity. Thus, the urban and agricultural land used cover 92% of the total area. The spatial distribution for As and Zn in the soil of the study area is located on very gentle slopes and is strongly correlated with the geological parent materials and human-induced contamination sources. Arsenic and Zn can be considered enriched in the soil of the area studied. The median topsoil contents (in mg kg−1) for As (agricultural soil 16.0; urban soil 17.8) and Zn (agricultural soil 92.0; urban soil 95.0) are higher compared to the corresponding median values of European topsoils. Land evaluation suitability concerning criteria given from the literature is discussed. The proposed work may be helpful in the project of land use planning and the protection of the natural environment.


Ibis ◽  
2006 ◽  
Vol 148 (4) ◽  
pp. 615-628 ◽  
Author(s):  
GRAEME M. BUCHANAN ◽  
MURRAY C. GRANT ◽  
ROY A. SANDERSON ◽  
JAMES W. PEARCE-HIGGINS
Keyword(s):  
Land Use ◽  

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