scholarly journals Factors of spatial distribution of forest floor properties in the Jizerské Mountains

2011 ◽  
Vol 51 (No. 10) ◽  
pp. 447-455 ◽  
Author(s):  
L. Borůvka ◽  
L. Mládková ◽  
O. Drábek ◽  
R. Vašát
Keyword(s):  
Spatial Distribution ◽  
Soil Properties ◽  
Forest Floor ◽  
Correlation Coefficients ◽  
Beech Forest ◽  
Soil Characteristics ◽  
Structural Correlation ◽  
N Loading ◽  
Mg Content ◽  
Humus Quality

The aim of this contribution was to describe spatial distribution of soil characteristics of forest floor in the Jizersk&eacute;Mountainsregion and to assess the effect of stand factors by means of geostatistics, using structural correlation coefficients. Most soil properties showed a low spatial dependence with variogram range of 6000 m. Kriged maps of spatial distribution of soil properties were created. Most characteristics were influenced by altitude. A general decrease of pH and Ca and Mg content and an increase of potentially toxic Al forms (Al<sub>KCl</sub>) due to high S and N loading were demonstrated. An effect of liming on the decrease of Al<sub>KCl</sub> content, and higher pH and Mg content and lower Al<sub>KCl</sub> under beech forest were shown. Lower acidity and a better humus quality were found at higher altitudes under grass coverin spite of high S and N content. The ratios S/Ca and S/(Ca + Mg) can serve as an indicator of soil acidification level.

scholarly journals Spatial relationships between soil attributes and corn yield in no-tillage system

2012 ◽  
Vol 36 (2) ◽  
pp. 599-609 ◽  
Author(s):  
Marcos Sales Rodrigues ◽  
José Eduardo Corá ◽  
Carolina Fernandes
Keyword(s):  
Spatial Distribution ◽  
Soil Properties ◽  
Distribution Pattern ◽  
Crop Yield ◽  
Chemical Properties ◽  
Clay Content ◽  
Soil Characteristics ◽  
Spatial Distribution Pattern ◽  
Corn Yield ◽  
Sampling Intensity

Soil properties play an important role in spatial variability of crop yield. However, a low spatial correlation has generally been observed between maps of crop yield and of soil properties. The objectives of the present investigation were to assess the spatial pattern variability of soil properties and of corn yield at the same sampling intensity, and evaluate its cause-and-effect relationships. The experimental site was structured in a grid of 100 referenced points, spaced at 10 m intervals along four parallel 250 m long rows spaced 4.5 m apart. Thus, points formed a rectangle containing four columns and 25 rows. Therefore, each sampling cell encompassed an area of 45 m² and consisted of five 10 m long crop rows, in which the referenced points represented the center. Samples were taken from the layers 0-0.1 m and 0.1-0.2 m. Soil physical and chemical properties were evaluated. Statistical analyses consisted of data description and geostatistics. The spatial dependence of corn yield and soil properties was confirmed. The hypothesis of this study was confirmed, i.e., when sampling the soil to determine the values of soil characteristics at similar to sampling intensity as for crop yield assessments, correlations between the spatial distribution of soil characteristics and crop yield were observed. The spatial distribution pattern of soil properties explained 65 % of the spatial distribution pattern of corn yield. The spatial distribution pattern of clay content and percentage of soil base saturation explained most of the spatial distribution pattern of corn yield.

scholarly journals SPATIAL DISTRIBUTION OF BRACKISHWATER POND SOIL CHARACTERISTICS IN PEKALONGAN CITY CENTRAL JAVA PROVINCE

2011 ◽  
Vol 6 (1) ◽  
pp. 91
Author(s):  
Andi Indrajaya Asaad ◽  
Akhmad Mustafa
Keyword(s):  
Spatial Distribution ◽  
Soil Depth ◽  
Research Result ◽  
Soil Characteristics ◽  
Kriging Interpolation ◽  
Total N ◽  
Central Java ◽  
Kriging Interpolation Method ◽  
Brackishwater Pond ◽  
Central Java Province

Spatial distribution of brackishwater pond soil has a vital role in the system of bioenvironment including brackishwater pond environment. This research was aimed to determine the spatial distribution of brackishwater pond soil characteristics in Pekalongan City, Central Java Province. A total of 59 sampling points each with two different soil depth samplings were determined by simple random method. A total of 21 soil characteristics were measured in the field and analyzed further in the laboratory. Geostatistic with Kriging Interpolation method in the ArcGIS 9.3 software were used to depict the distribution of the data across the landscape. Furthermore, the spatial distribution was presented by using ALOS AVNIR-2 image. Research result indicates that in general, pond soil in Pekalongan City can be classified as soil with high variability or relatively heterogenic with the value of variation coefficient more than 36%. Soil characteristics which have similar pattern of spatial distribution are acid sulfate soil and soil nutrient content. High value of pH, organic matter, and total-N of soil, and on the other hand, low value of PO4 were generally found in the pond area of Krapyak Lor Village, while in Pekalongan City, it was found high clayish soil content but relatively homogenous. It is recommended that pond management must be based on soil characteristics which are different from one area to another. The soil characteristics itself can be drawn and assessed through spatial distribution.

scholarly journals Características e propriedades dos solos relevantes para os estudos pedológicos e análise dos processos erosivos

1996 ◽  
Vol 19 ◽  
pp. 93-114
Author(s):  
Antonio José Teixeira Guerra ◽  
Rosangela Garrido Machado Botelho
Keyword(s):  
Soil Erosion ◽  
Soil Properties ◽  
Environmental Impacts ◽  
Soil Formation ◽  
Soil Characteristics ◽  
Erosion Processes ◽  
Main Factors ◽  
Factors Of Soil Formation

This paper regards the role of soil characteristics and properties on pedological surveys and soil erosion investigations. Therefore, the main factors of soil formation are here discussed. Furthermore, the main chemical and physical soil properties are also taken into consideration, in order to approach this subject. Finally, some erosion processes are also carried out, together with the main erosion forms and the environmental impacts caused by these associated processes.

scholarly journals Importance of terrain attributes in relation to the spatial distribution of soil properties at the micro scale: a case study

2018 ◽  
Vol 98 (2) ◽  
pp. 292-305 ◽  
Author(s):  
Vivekananthan Kokulan ◽  
Olalekan Akinremi ◽  
Alan Pierre Moulin ◽  
Darshani Kumaragamage
Keyword(s):  
Spatial Distribution ◽  
Soil Properties ◽  
Micro Scale ◽  
Terrain Attributes

scholarly journals Methods for the Assessment of Humic Substances Quality in Forest Soils  

2013 ◽  
Vol 1 (No. 1) ◽  
pp. 3-9
Author(s):  
Mládková Lenka ◽  
Borůvka Marcela Rohošková and Luboš
Keyword(s):  
Humic Acids ◽  
Forest Soils ◽  
Beech Forest ◽  
Soil Extract ◽  
Soil Samples ◽  
Drift Spectroscopy ◽  
Organic Matter Quality ◽  
C And N ◽  
Drift Spectra ◽  
Humus Quality

This paper is focused on soil organic matter quality assessment in acid forest soils. Soil samples were collected in the Jizera Mountains region. Vegetation cover of sampling sites was formed by spruce or beech monocultures. Humus quality was assessed by the ratio of absorbances of pyrophosphate soil extract at the wavelengths of 400 and 600 nm (A400/A600). Humus fractionation was performed on selected soil samples. DRIFT spectra of individual fractions were measured. Higher pH and lower C and N contents were found in beech forest than in spruce forest. A400/A600 well correlates with C and N contents (r = 0.510*** and 0.615***, respectively). C and N content increases as to humus quality decreases. DRIFT spectra of fulvic acids turned out to be unsuitable for describing differences in humus quality. DRIFT spectra of humic acids and humin were hence more suitable. The difference between spruce and beech forest was found in 1514.cm&ndash;1 (C=C bounds of benzene rings) and 1550 cm&ndash;1 (N-H bounds in monosubstituted amides) bands intensities. Humic acids and humin coming from the O horizons of beech forest are relatively enriched by nitrogen functional groups. Values of humic acids aromaticity index did not differ between beech and spruce forests. DRIFT spectroscopy was shown as a possible method for detailed humus quality studying.

A new approach to soil classification mapping based on the spatial distribution of soil properties

Geoderma ◽  
2014 ◽  
Vol 219-220 ◽  
pp. 106-116 ◽  
Author(s):  
Alessandra Fagioli da Silva ◽  
Maria João Pereira ◽  
João Daniel Carneiro ◽  
Célia Regina Lopes Zimback ◽  
Paulo Milton Barbosa Landim ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Soil Properties ◽  
Soil Classification ◽  
New Approach
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