scholarly journals The effect of land management practices on soil physical and chemical properties in Gojeb Sub-river Basin of Dedo District, Southwest Ethiopia

2016 ◽  
Vol 7 (10) ◽  
pp. 154-165 ◽  
Author(s):  
Bezabih Bahilu ◽  
Aticho Abebayehu ◽  
Mossisa Tadesse ◽  
Dume Bayu
Keyword(s):  
River Basin ◽  
Land Management ◽  
Management Practices ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Southwest Ethiopia ◽  
Physical And Chemical ◽  
And Chemical Properties

scholarly journals Variation of soil nutrients and bacterial community diversity of different land utilization types in Yangtze River Basin, Chongqing Municipality

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9386
Author(s):  
Yanlin Li ◽  
Chunmei Zeng ◽  
Meijun Long
Keyword(s):  
Land Use ◽  
River Basin ◽  
Yangtze River ◽  
Yangtze River Basin ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Chongqing Municipality ◽  
Land Use Types ◽  
Physical And Chemical ◽  
And Chemical Properties

The diversity and community distribution of soil bacteria in different land use types in Yangtze River Basin, Chongqing Municipality were studied by using Illumina MiSeq analysis methods. Soil physical and chemical properties were determined, and correlation analyses were performed to identify the key factors affecting bacterial numbers and α-diversity in these soils. The results showed that the soil physical and chemical properties of different land use types decrease in the order: mixed forest (M2) > pure forest (P1) > grassland (G3) > bare land (B4). There were significant differences in bacterial diversity and communities of different land use types. The diversity of different land use types showed the same sequence with the soil physical and chemical properties. The abundance and diversity of bacterial in M2 and P1 soils was significantly higher than that in G3 and B4 soils. At phylum level, G3 and B4 soils were rich in only Proteobacteria and Actinobacteria, whereas M2 and P1 soils were rich in Proteobacteria, Actinobacteria and Firmicutes. At genus level, Faecalibacterium and Agathobacter were the most abundant populations in M2 soil and were not found in other soils. Pearson correlation analysis showed that soil moisture content, pH, AN, AP, AK and soil enzyme activity were significantly related to bacterial numbers, diversity and community distribution.

scholarly journals Spatial Variability of Physical and Chemical Properties in Northern Himalayas of Kashmir Province

2021 ◽  
pp. 193-202
Author(s):  
Ayman Javed ◽  
Shaista Nazir Bhat ◽  
Rajnish Yadav ◽  
Mushtaq Ahmad Wani
Keyword(s):  
Electrical Conductivity ◽  
Organic Carbon ◽  
Spatial Variability ◽  
Management Practices ◽  
Particle Density ◽  
Chemical Properties ◽  
Soil Management ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Due to geological and pedological soil-forming factors, spatial variability of soil physical and chemical properties across the agricultural fields is intrinsic by its nature, however variability may arise from tillage and other soil management practices. The main aim of this survey was to investigate the spatial variability of soil physical along with chemical properties and the preparation of thematic maps across the study area. The physico-chemical properties determined were Particle size distribution, Bulk density, Particle density, total porosity, soil resistance, soil pH, Electrical conductivity (EC), Organic carbon (OC), Nitrogen(N), Phosphorus (P), Potassium(K). Soil samples were collected from 45 sites using Geographical Positioning System (GPS) under different land-use systems. The results showed normal distribution for Sand, silt, particle density, electrical conductivity, and soil pH. Organic carbon recorded the maximum coefficient of variation (82.2%) and soil particle density (5.66%) the minimum. Soil macronutrients were medium in range excluding phosphorus which was found inadequate in the watershed. Employing such analytic work, it is feasible to devise accurate soil management practices and an unerring soil sampling system for taking efficient management judgments that result in sustainable agricultural production.

scholarly journals Investigation of Land Use Types on Physical and Chemical Properties of Soil in a Basement Terrain

2019 ◽  
Vol 66 (1) ◽  
pp. 39-49
Author(s):  
Aderemi A. Alabi ◽  
Johnson O. Aina ◽  
Adebambo O. Adewale ◽  
Abass A. Ajanaku
Keyword(s):  
Land Use ◽  
Management Practices ◽  
Soil Depth ◽  
Chemical Properties ◽  
Nutrient Loss ◽  
Physical And Chemical Properties ◽  
Land Use Types ◽  
Physical And Chemical ◽  
Properties Of Soil ◽  
And Chemical Properties

AbstractWe assessed the effect of different land use types on the physical and chemical properties of soil. We analysed three cases. Nine soil samples were taken at different depths (0–10, 10–20 and 20–30 cm) from three locations, namely, sawmill, dumpsite and market. Analyses were carried out to determine the influences on the physical and chemical properties of the soil. All the land types had considerably high sand contents, with minor silt and clay. Available phosphorus and the exchangeable bases were significantly (p ≤ 0.05) affected by land use and soil depth. Moisture content (p ≤ 0.05) was significantly affected by land use, while bulk density (p ≤ 0.01) was significantly affected by soil depth. Soil organic matter and carbon were also generally low in all three locations. Consequently, ameliorative land management practices have to be adopted to prevent nutrient loss and land degradation.

scholarly journals Characterization and Classification of Soils of a Toposequence in a Derived Savannah Agroecological Zone of Nigeria

2019 ◽  
Vol 13 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Kehinde A. Adegbite ◽  
Millicent E. Okafor ◽  
Aruna O. Adekiya ◽  
Elizabeth T. Alori ◽  
Ojo T. V. Adebiyi
Keyword(s):  
Management Practices ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Morphological Characteristics ◽  
Matter Content ◽  
Physical And Chemical Properties ◽  
Bottom Slope ◽  
Physical And Chemical ◽  
And Chemical Properties

Background:Soil properties are anisotropic in nature, hence the need to study soil associations and regional landscapes for sustainable nutrient management and soil profile is an important tool which can be utilized for this purpose.Objective:The objectives of the study are to describe the morphology of the soils of the toposequence, determine their physical and chemical properties, classify them and make an appraisal of their agricultural potentials.Methods:Three slope classes were considered and a total of three profile pits, one on each slope were studied and described in the field morphologically at Eleyin Farms Omu-Aran, Kwara State, Nigeria, which was a newly opened up plantation.Samples of soil were collected from the horizons of the profile pits. The soil samples were analyzed for their physical and chemical properties.Results:All the three pedons showed appreciable differences in physical, chemical, and morphological characteristics of the soils and their classifications were determined as guided by their characteristics. The textural classes were defined mainly by the sand compositions which decreased from the upper and middle slopes down to the bottom slope, and the clay compositions which increased progressively from the uppermost slope through the middle slope to the bottom slope. Silt compositions did not exhibit any particular pattern.Conclusion:Thus, sand and clay compositions were more significant and relevant to the textural classification of the soils of the area than silt. The low nutrient status of the soils can be ameliorated by incorporation of organic or farm residues to increase the organic matter content of the soil, and also improve management practices and guided chemical fertilizer use. The soils of the area were classified as Typic Haplustalf (USDA), and Ferric Luvisol (FAO).

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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