Abstract. JARAMILLO JARAMILLO, Daniel Francisco. SPATIAL VARIABILITY OF THE ANDIC PROPERTIES IN AN HYDROMORPHIC ANDISOL FROM THE. Colombia. Sánchez Espinosa, Jorge Alberto; Rubiano Sanabria, Yolanda. PROCESOS ESPECÍFICOS DE FORMACIÓN EN ANDISOLES, ALFISOLES Y. Determinación de acidez en andisoles de la zona cafetera colombiana utilizando diferentes metodologias. Article (PDF Available) in Acta.
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Identification of agronomic management units based on physical attributes of soil. Once it reaches this depth, there is a marked difference in the infiltration behavior, since in the infiltration determined with double rings the lateral flow of the internal ring is limited Youngs, Most attributes evaluated showed a symmetric distribution, observed in the similar values of mean and median and verified by the skewness and kurtosis coefficients close to zero, showing a behavior that approaches to normal distribution Grego and Vieira,as is confirmed by the Kolmogorov-Smirnov test Table 1.
In sequence, contour maps offer the possibility of identifying soil sectors where greater or lesser water deficit exists, as a function of the hydrodynamic parameters Bi and S1, with which the conditions of management of the time and water layers application can be optimized, as well as the frequency of irrigation, which can diminish production costs, at the same time as the presence of degrading processes would be diminished, especially the formation of surface run-off, when one decides to supply a uniform irrigation layer.
Some comments on its use. The main number of attributes that showed significant correlations were also the highest expression in the cluster analysis and in turn, which showed better similarity in their spatial variability, as observed between maps obtained by kriging for attributes that were fitted to theoretical models of semivariograms.
The maximum distance of the sampling considered for the analysis of the semivariograms was The objective of the present study was to characterize the spatial variability of the surface infiltration and its relation to some soil physical attributes Typic Haplustox in the Eastern Plains Llanos Orientales of Colombia, using statistical methods, which support the localized management of soil and water in agricultural systems that are within the framework of the precision agriculture.
Andisol – Wikipedia
The influence of sand content on Bd can also be observed, where those zones that showed high sand content showed greater values of Bd. Evaluation of some infiltration models and hydraulic parameters. The nugget anxisoles the discontinuity among samples, which is to say the spatial variability not detected during the sampling process.
Group III is composed of Ks, Ib, S 1and Ci, attributes that allow describing water movement in the soil and that show the greatest correlations, since they were determined on the basis of the experimental infiltration curve, with ansisoles exception of Ci, which was obtained by node upon finishing the coombia test.
Contour maps obtained by kriging of basic infiltration Asorptivity Bbulk density Csoil moisture Dand sand Esilt Fand clay G contents.
It has the lowest air temperature, precipitation level, soil water-holding capacity, and nutrient content of all the zones.
Pesquisa Agropecuaria Brasileira Retrieved 2 November The smallest Euclidean distances reported for this group show the strong correlation between these attributes, as observed in the correlation of Pearson.
According to Warrick and Nielsenthe variables sand, silt, clay, and Bd showed low variability, Bi, S 1Ks, and Sm showed medium variability, while the cumulative infiltration Ci showed high variability. Later analysis of Pearson linear correlation was performed, together with the cluster analysis CAwith the aim of estimating the andislles that exists between the soil attributes. Views Read Edit View history.
Some authors define the constant Ks as an adjustment parameter Lima and Silans, or a factor Machiwal et al. CS1 Spanish-language sources es CS1 maint: Contour maps confirm the existence of spatial variability of evaluated attributes Figure 2defined by heterogeneity and complexity that link hydrophysical attributes, among which size, form, and continuity of pores and of soil aggregates, which in turn determine the size and roots development Imhoff et al.
The precise determination of the water infiltration rate in the soil helps to minimize the risks of degradation, especially with the adisoles of surface runoff. The range represents the distance where this constant correlation is reached; indicating that on the basis of this distance there is no correlation among samples.
Soil Biology and Biochemistry Nuestro patrimonio – tesoros de Colombia – Our heritage – treasures of Colombia in Spanish. Through Equations 1 and 2 it is shown that when soil moisture is low, the initial rate of infiltration is high, due to the sorptivity, but with time the infiltration rate reaches a constant value, which is defined as the Bi and is similar to the saturated hydraulic conductivity Gil, The analysis of the descriptive and multivariate statistics was performed with the program SPSS v.
Each time a marked variation in the values of the Euclidean distance is shown, it is possible to identify the groups. The sand, silt and clay contents present the ranges reported by Ramirez-Lopez et al. The basic infiltration Bi and clay content differ from this behavior. In general, such models can be divided into colomiba unbounded linear, logarithmic, potential and bounden spherical, exponential, Gaussian.
With the data obtained, fits were made using the model that shows the cumulative infiltration in an elapsed time in a vertical flow Philip modelon the basis of which the basic infiltration Bithe sorptivity S1and the saturated hydraulic conductivity Ks were defined. The adnisoles of the CA are represented in graphic form dendrogramin order to facilitate the identification of the groups formed by the attributes, together with the representation of the variation of the Euclidean distance between the attributes in order to define the point at which a dependency among the parameters exists.
Retrieved from ” https: Cotopaxi National Park contains Increases in temperature extremes are forcing many fauna and flora species to higher grounds, and eventually they could face extinction. Recognition of een variability leads to reevaluating the conventional soil management in agricultural production, which assumes a homogeneous behavior of the soil attributes, and general recommendations are used.
PROCESOS ESPECÍFICOS DE FORMACIÓN EN ANDISOLES, ALFISOLES Y ULTISOLES EN COLOMBIA
On 8 Februarythe Constitutional Court of Colombia banned all mining operations in the paramos, prioritising the protection of the environment, and terminating mining licenses that had operational rights in the ecosystem. These authors affirm dolombia this soil shows natural compaction processes of the soil aggregates, which justifies the high values found for the bulk density Bdwhose reported values are less in a study carried out in the rainy season of the same region Jaimes et al.
Arctic, Antarctic, and Alpine Research. Philip elaborated a summary form of Equation 1 with two fitting parameters, sufficient to describe the behavior of the infiltration in relation to time Equation 2: Equations 4, 5, and 6 show the expressions that define the spherical, exponential and Gaussian semivariograms, respectively. Usually Ks and S1 exhibit similar tendency Abrisqueta et al. In Colombia and northern Ecuador, air masses from the Intertropical Convergence Zone ITCZ have a substantial effect on the climate, and these regions tend to be consistently humid approx.
The exponential and Gaussian models are applied when the spatial dependence shows a continuous growth in proportion to the distance between the observations, where the spatial dependence vanishes at a distance that tends toward the infinite. Modelling infiltration and quantifying spatial soil variability in a Wasteland of Kharagpur, India. Water infiltration in colokbia soil occurs through a combination of flow directions, vertically as well as horizontally.
The direct relationship found between Bi and S 1 can equally be observed in maps obtained for ansisoles attributes.