Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia

Growing demand for food exerts pressure on natural resources and may lead to the expansion of agricultural frontiers in developing countries. Most of this pressure appears in tropical zones, in native savannahs, with naturally infertile soils prone to degradation. Crop management in these regions is...

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Autores principales:	Camacho-Tamayo,Jesús H, Luengas,Carlos A, Leiva,Fabio R
Lenguaje:	English
Publicado:	Instituto de Investigaciones Agropecuarias, INIA 2008
Materias:	geostatistics kriging soil management precision agriculture
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100005
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spelling	oai:scielo:S0718-583920080001000052018-10-01Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of ColombiaCamacho-Tamayo,Jesús HLuengas,Carlos ALeiva,Fabio R geostatistics kriging soil management precision agriculture kriging Growing demand for food exerts pressure on natural resources and may lead to the expansion of agricultural frontiers in developing countries. Most of this pressure appears in tropical zones, in native savannahs, with naturally infertile soils prone to degradation. Crop management in these regions is based on generalized estimates, leaving aside the inherent soil variability, leading to low production efficiency and high risk of environmental damage. This study aims at determining the spatial variability of some chemical properties, including organic carbon, pH, exchangeable acidity, exchangeable aluminum, P, Ca, Mg, K and Na for two Oxisols with different levels of agricultural intervention, in Puerto Lopez, Colombia, in order to identify guidelines for site-specific management. A forty-two point grid (25’ 25 m) was established for samplings at two depths: 0-100 and 100-200 mm. Descriptive statistics and geostatistics were used to analyze soil properties spatial dependence. Variogram models were obtained and from them maps of properties were drawn using ordinary punctual kriging. The results showed that spatial variability of the soil chemical properties depends upon the use of amendments, fertilizing methods, tillage and the inherent characteristics of each variable analyzed. A greater influence of the agricultural intervention on spatial variability was evident in the upper 100 mm of soil. Spatial dependence was found for most of the studied soil properties. However, K and Na presented variograms with pure nugget effects and/or very short ranges. The information generated is a base to derive guidelines for site-specific agricultureinfo:eu-repo/semantics/openAccessInstituto de Investigaciones Agropecuarias, INIAChilean journal of agricultural research v.68 n.1 20082008-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100005en10.4067/S0718-58392008000100005
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	geostatistics kriging soil management precision agriculture kriging
spellingShingle	geostatistics kriging soil management precision agriculture kriging Camacho-Tamayo,Jesús H Luengas,Carlos A Leiva,Fabio R Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
description	Growing demand for food exerts pressure on natural resources and may lead to the expansion of agricultural frontiers in developing countries. Most of this pressure appears in tropical zones, in native savannahs, with naturally infertile soils prone to degradation. Crop management in these regions is based on generalized estimates, leaving aside the inherent soil variability, leading to low production efficiency and high risk of environmental damage. This study aims at determining the spatial variability of some chemical properties, including organic carbon, pH, exchangeable acidity, exchangeable aluminum, P, Ca, Mg, K and Na for two Oxisols with different levels of agricultural intervention, in Puerto Lopez, Colombia, in order to identify guidelines for site-specific management. A forty-two point grid (25’ 25 m) was established for samplings at two depths: 0-100 and 100-200 mm. Descriptive statistics and geostatistics were used to analyze soil properties spatial dependence. Variogram models were obtained and from them maps of properties were drawn using ordinary punctual kriging. The results showed that spatial variability of the soil chemical properties depends upon the use of amendments, fertilizing methods, tillage and the inherent characteristics of each variable analyzed. A greater influence of the agricultural intervention on spatial variability was evident in the upper 100 mm of soil. Spatial dependence was found for most of the studied soil properties. However, K and Na presented variograms with pure nugget effects and/or very short ranges. The information generated is a base to derive guidelines for site-specific agriculture
author	Camacho-Tamayo,Jesús H Luengas,Carlos A Leiva,Fabio R
author_facet	Camacho-Tamayo,Jesús H Luengas,Carlos A Leiva,Fabio R
author_sort	Camacho-Tamayo,Jesús H
title	Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
title_short	Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
title_full	Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
title_fullStr	Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
title_full_unstemmed	Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia
title_sort	effect of agricultural intervention on the spatial variability of some soils chemical properties in the eastern plains of colombia
publisher	Instituto de Investigaciones Agropecuarias, INIA
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100005
work_keys_str_mv	AT camachotamayojesush effectofagriculturalinterventiononthespatialvariabilityofsomesoilschemicalpropertiesintheeasternplainsofcolombia AT luengascarlosa effectofagriculturalinterventiononthespatialvariabilityofsomesoilschemicalpropertiesintheeasternplainsofcolombia AT leivafabior effectofagriculturalinterventiononthespatialvariabilityofsomesoilschemicalpropertiesintheeasternplainsofcolombia
_version_	1714205258409836544

Effect of Agricultural Intervention on the Spatial Variability of some Soils Chemical Properties in the Eastern Plains of Colombia

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