Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands
Soil acidity is a major limiting factor for potato production in Peru's high Andean region. This study aims to predict the spatial variability of soil acidity as a fundamental tool for recommending site-specific liming treatments and to identify the physical-chemical characteristics most closely rel...
| Main Authors: | , , , , , |
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| Format: | info:eu-repo/semantics/article |
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MDPI
2025
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| Online Access: | http://hdl.handle.net/20.500.12955/2676 |
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| author | Quispe Matos, Kenyi Rolando Mejía, Sharon Carbajal Llosa, Carlos Miguel Alejandro Mendez, Lidiana Rene Verástegui Martinez, Patricia Solórzano Acosta, Richard Andi |
| author_browse | Alejandro Mendez, Lidiana Rene Carbajal Llosa, Carlos Miguel Mejía, Sharon Quispe Matos, Kenyi Rolando Solórzano Acosta, Richard Andi Verástegui Martinez, Patricia |
| author_facet | Quispe Matos, Kenyi Rolando Mejía, Sharon Carbajal Llosa, Carlos Miguel Alejandro Mendez, Lidiana Rene Verástegui Martinez, Patricia Solórzano Acosta, Richard Andi |
| author_sort | Quispe Matos, Kenyi Rolando |
| collection | Repositorio INIA |
| description | Soil acidity is a major limiting factor for potato production in Peru's high Andean region. This study aims to predict the spatial variability of soil acidity as a fundamental tool for recommending site-specific liming treatments and to identify the physical-chemical characteristics most closely related to soil acidity. The soil samples were collected from five locations in the province of Pachitea, Huánuco. Descriptive statistics, principal component analysis (PCA), and Pearson correlation analysis were used to identify the soil properties contributing most to total variance and those most strongly correlated with soil acidity. The ordinary geostatistical kriging method evaluated the predictive accuracy for 23 soil properties and liming requirements over a 28,463 ha area, at a spatial resolution of 10 m. Results showed that the Plaza Punta and Buenos Aires locations had more degraded acidic soils, with frequencies between 55% and 100% above the general mean (30.94 ± 24.87%) and the critical threshold (25%) for potato cultivation. Variables such as exchangeable calcium percentage (ECP), Ca2+, Mg2+, sand content, and organic matter strongly correlated with soil acidity, while exchangeable H+ and ECP were the main contributors to the total variance. Geostatistical analysis revealed that Mg2+ and Ca2+ had the highest R² values (0.87 and 0.76, respectively), indicating a strong fit between observed and predicted values in the spatial analysis of soil acidity. It is concluded that the agricultural dolomite requirements in the localities of Plaza Punta and Buenos Aires exhibit high spatial predictability. Additionally, the analysis of diverse soil physicochemical properties is emphasized as critical for determining precise application rates. |
| format | info:eu-repo/semantics/article |
| id | INIA2676 |
| institution | Institucional Nacional de Innovación Agraria |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | MDPI |
| publisherStr | MDPI |
| record_format | dspace |
| spelling | INIA26762025-03-24T05:08:22Z Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands Quispe Matos, Kenyi Rolando Mejía, Sharon Carbajal Llosa, Carlos Miguel Alejandro Mendez, Lidiana Rene Verástegui Martinez, Patricia Solórzano Acosta, Richard Andi Soil fertility soil acidity geostatistical interpolation spatial analysis https://purl.org/pe-repo/ocde/ford#4.01.01 Solanum tuberosum | Acidity | Lime | Fertilizers | Soil fertility | Geostatistics Soil acidity is a major limiting factor for potato production in Peru's high Andean region. This study aims to predict the spatial variability of soil acidity as a fundamental tool for recommending site-specific liming treatments and to identify the physical-chemical characteristics most closely related to soil acidity. The soil samples were collected from five locations in the province of Pachitea, Huánuco. Descriptive statistics, principal component analysis (PCA), and Pearson correlation analysis were used to identify the soil properties contributing most to total variance and those most strongly correlated with soil acidity. The ordinary geostatistical kriging method evaluated the predictive accuracy for 23 soil properties and liming requirements over a 28,463 ha area, at a spatial resolution of 10 m. Results showed that the Plaza Punta and Buenos Aires locations had more degraded acidic soils, with frequencies between 55% and 100% above the general mean (30.94 ± 24.87%) and the critical threshold (25%) for potato cultivation. Variables such as exchangeable calcium percentage (ECP), Ca2+, Mg2+, sand content, and organic matter strongly correlated with soil acidity, while exchangeable H+ and ECP were the main contributors to the total variance. Geostatistical analysis revealed that Mg2+ and Ca2+ had the highest R² values (0.87 and 0.76, respectively), indicating a strong fit between observed and predicted values in the spatial analysis of soil acidity. It is concluded that the agricultural dolomite requirements in the localities of Plaza Punta and Buenos Aires exhibit high spatial predictability. Additionally, the analysis of diverse soil physicochemical properties is emphasized as critical for determining precise application rates. This research was funded by the National Institute of Agricultural Innovation (INIA) project “Mejoramiento de los servicios de investigación y transferencia tecnológica en el manejo y recuperación de suelos agrícolas degradados y aguas para riego en la pequeña y mediana agricultura en los departamentos de Lima, Áncash, San Martín, Cajamarca, Lambayeque, Junín, Ayacucho, Arequipa, Puno y Ucayali" CUI 2487112. 2025-03-24T05:08:22Z 2025-03-24T05:08:22Z 2024-12-13 info:eu-repo/semantics/article Quispe, K.; Mejía, S.; Carbajal, C.; Alejandro, L.; Verástegui, P.; Solórzano, R. Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands. Agriculture 2024, 14, 2286. https://doi.org/10.3390/agriculture14122286 http://hdl.handle.net/20.500.12955/2676 10.3390/agriculture14122286 2077-0472 Agriculture info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ application/pdf application/pdf MDPI CH Instituto Nacional de Innovación Agraria Repositorio Institucional - INIA |
| spellingShingle | Soil fertility soil acidity geostatistical interpolation spatial analysis https://purl.org/pe-repo/ocde/ford#4.01.01 Solanum tuberosum | Acidity | Lime | Fertilizers | Soil fertility | Geostatistics Quispe Matos, Kenyi Rolando Mejía, Sharon Carbajal Llosa, Carlos Miguel Alejandro Mendez, Lidiana Rene Verástegui Martinez, Patricia Solórzano Acosta, Richard Andi Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title | Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title_full | Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title_fullStr | Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title_full_unstemmed | Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title_short | Spatial Variability of Soil Acidity and Lime Requirements for Potato Cultivation in the Huánuco Highlands |
| title_sort | spatial variability of soil acidity and lime requirements for potato cultivation in the huanuco highlands |
| topic | Soil fertility soil acidity geostatistical interpolation spatial analysis https://purl.org/pe-repo/ocde/ford#4.01.01 Solanum tuberosum | Acidity | Lime | Fertilizers | Soil fertility | Geostatistics |
| url | http://hdl.handle.net/20.500.12955/2676 |
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