Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields

Autores
Barbagelata, Pedro Anibal
Año de publicación
2006
Idioma
inglés
Tipo de recurso
tesis doctoral
Estado
versión aceptada
Colaborador/a o director/a de tesis
Mallarino, Antonio P.
Descripción
Tesis para obtener el grado de Philosophical Doctor (PhD), Major: Soil Science, de la Iowa State University, en 2006
Improving the use of soil testing in production agriculture may result in increased nutrient use efficiency and profitability. Three studies were conducted in Iowa with this general goal. One study assessed the impact of soil sample drying on K extraction and developed field correlations of an ammonium-acetate K test (AA) based on field-moist samples for corn and soybean. Potassium extracted with AA from dried samples was higher than K extracted from moist samples. The difference increased with increasing drying temperature, was inversely related to the soil K level, and varied among soil series. The moist AA test correlated better with yield response to fertilization than the common test based on dried samples. Critical concentration ranges defined by Cate-Nelson and linear-plateau models across 64 site-years of data for corn (mg K kg-1, 15 cm depth) were 144-201 and 62-76 for dry and moist tests. Ranges for soybean across 57 site-years were 121-214 and 52-90 mg K kg-1, respectively;A second study compared the efficacy of AA, Mehlich-3, and sodium tetraphenylboron soil K extractants in determining soil K availability for corn and soybean. Mehlich-3 and AA extracted similar amounts of K. Sodium tetraphenylboron extracted K was significantly higher, differences increased with increasing soil K, and decreased as the Ca and Mg to K ratio increased. Mehlich-3 and AA showed similarly poor predictability of crop response to K. The sodium tetraphenylboron test did not improve consistently the predictability of crop response to K. Critical concentration ranges (mg K kg-1, 15 cm depth) for corn across 63 site-years were 133-216, 128-199, and 421-641 for AA, Mehlich-3, and sodium tetraphenylboron tests. Ranges for soybean across 54 site-years were 122-191, 114-185, and 473-556 mg K kg-1, respectively;A third study examined spatial variability of soil fertility properties (soil-test P, K, Mg, and pH) using geostatistics and compared inverse distance weighting, ordinary kriging, and universal kriging for data interpolation and mapping. Soil-test variability and its spatial structure varied across nutrients and fields. Universal kriging was the least accurate interpolation method. The results indicated that the sampling density required for effective use of variable-rate technology differs across fields.
EEA Paraná
Fil: Barbagelata, Pedro Anibal. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina
Materia
Suelo
Fertilidad del Suelo
Potasio
Cultivos
Soja
Maíz
Soil
Soil Fertility
Potassium
Crops
Soybeans
Maize
Iowa, Estados Unidos
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/6952

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oai_identifier_str oai:localhost:20.500.12123/6952
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network_name_str INTA Digital (INTA)
spelling Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fieldsBarbagelata, Pedro AnibalSueloFertilidad del SueloPotasioCultivosSojaMaízSoilSoil FertilityPotassiumCropsSoybeansMaizeIowa, Estados UnidosTesis para obtener el grado de Philosophical Doctor (PhD), Major: Soil Science, de la Iowa State University, en 2006Improving the use of soil testing in production agriculture may result in increased nutrient use efficiency and profitability. Three studies were conducted in Iowa with this general goal. One study assessed the impact of soil sample drying on K extraction and developed field correlations of an ammonium-acetate K test (AA) based on field-moist samples for corn and soybean. Potassium extracted with AA from dried samples was higher than K extracted from moist samples. The difference increased with increasing drying temperature, was inversely related to the soil K level, and varied among soil series. The moist AA test correlated better with yield response to fertilization than the common test based on dried samples. Critical concentration ranges defined by Cate-Nelson and linear-plateau models across 64 site-years of data for corn (mg K kg-1, 15 cm depth) were 144-201 and 62-76 for dry and moist tests. Ranges for soybean across 57 site-years were 121-214 and 52-90 mg K kg-1, respectively;A second study compared the efficacy of AA, Mehlich-3, and sodium tetraphenylboron soil K extractants in determining soil K availability for corn and soybean. Mehlich-3 and AA extracted similar amounts of K. Sodium tetraphenylboron extracted K was significantly higher, differences increased with increasing soil K, and decreased as the Ca and Mg to K ratio increased. Mehlich-3 and AA showed similarly poor predictability of crop response to K. The sodium tetraphenylboron test did not improve consistently the predictability of crop response to K. Critical concentration ranges (mg K kg-1, 15 cm depth) for corn across 63 site-years were 133-216, 128-199, and 421-641 for AA, Mehlich-3, and sodium tetraphenylboron tests. Ranges for soybean across 54 site-years were 122-191, 114-185, and 473-556 mg K kg-1, respectively;A third study examined spatial variability of soil fertility properties (soil-test P, K, Mg, and pH) using geostatistics and compared inverse distance weighting, ordinary kriging, and universal kriging for data interpolation and mapping. Soil-test variability and its spatial structure varied across nutrients and fields. Universal kriging was the least accurate interpolation method. The results indicated that the sampling density required for effective use of variable-rate technology differs across fields.EEA ParanáFil: Barbagelata, Pedro Anibal. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; ArgentinaIowa State UniversityMallarino, Antonio P.2020-03-16T15:06:38Z2020-03-16T15:06:38Z2006info:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_db06info:ar-repo/semantics/tesisDoctoralapplication/pdfhttp://hdl.handle.net/20.500.12123/6952https://lib.dr.iastate.edu/rtd/1797/https://doi.org/10.31274/rtd-180813-15419enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuaria2025-09-29T13:44:54Zoai:localhost:20.500.12123/6952instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:44:54.617INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
title Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
spellingShingle Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
Barbagelata, Pedro Anibal
Suelo
Fertilidad del Suelo
Potasio
Cultivos
Soja
Maíz
Soil
Soil Fertility
Potassium
Crops
Soybeans
Maize
Iowa, Estados Unidos
title_short Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
title_full Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
title_fullStr Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
title_full_unstemmed Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
title_sort Evaluation of potassium soil tests and methods for mapping soil fertility properties in Iowa corn and soybean fields
dc.creator.none.fl_str_mv Barbagelata, Pedro Anibal
author Barbagelata, Pedro Anibal
author_facet Barbagelata, Pedro Anibal
author_role author
dc.contributor.none.fl_str_mv Mallarino, Antonio P.
dc.subject.none.fl_str_mv Suelo
Fertilidad del Suelo
Potasio
Cultivos
Soja
Maíz
Soil
Soil Fertility
Potassium
Crops
Soybeans
Maize
Iowa, Estados Unidos
topic Suelo
Fertilidad del Suelo
Potasio
Cultivos
Soja
Maíz
Soil
Soil Fertility
Potassium
Crops
Soybeans
Maize
Iowa, Estados Unidos
dc.description.none.fl_txt_mv Tesis para obtener el grado de Philosophical Doctor (PhD), Major: Soil Science, de la Iowa State University, en 2006
Improving the use of soil testing in production agriculture may result in increased nutrient use efficiency and profitability. Three studies were conducted in Iowa with this general goal. One study assessed the impact of soil sample drying on K extraction and developed field correlations of an ammonium-acetate K test (AA) based on field-moist samples for corn and soybean. Potassium extracted with AA from dried samples was higher than K extracted from moist samples. The difference increased with increasing drying temperature, was inversely related to the soil K level, and varied among soil series. The moist AA test correlated better with yield response to fertilization than the common test based on dried samples. Critical concentration ranges defined by Cate-Nelson and linear-plateau models across 64 site-years of data for corn (mg K kg-1, 15 cm depth) were 144-201 and 62-76 for dry and moist tests. Ranges for soybean across 57 site-years were 121-214 and 52-90 mg K kg-1, respectively;A second study compared the efficacy of AA, Mehlich-3, and sodium tetraphenylboron soil K extractants in determining soil K availability for corn and soybean. Mehlich-3 and AA extracted similar amounts of K. Sodium tetraphenylboron extracted K was significantly higher, differences increased with increasing soil K, and decreased as the Ca and Mg to K ratio increased. Mehlich-3 and AA showed similarly poor predictability of crop response to K. The sodium tetraphenylboron test did not improve consistently the predictability of crop response to K. Critical concentration ranges (mg K kg-1, 15 cm depth) for corn across 63 site-years were 133-216, 128-199, and 421-641 for AA, Mehlich-3, and sodium tetraphenylboron tests. Ranges for soybean across 54 site-years were 122-191, 114-185, and 473-556 mg K kg-1, respectively;A third study examined spatial variability of soil fertility properties (soil-test P, K, Mg, and pH) using geostatistics and compared inverse distance weighting, ordinary kriging, and universal kriging for data interpolation and mapping. Soil-test variability and its spatial structure varied across nutrients and fields. Universal kriging was the least accurate interpolation method. The results indicated that the sampling density required for effective use of variable-rate technology differs across fields.
EEA Paraná
Fil: Barbagelata, Pedro Anibal. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Paraná; Argentina
description Tesis para obtener el grado de Philosophical Doctor (PhD), Major: Soil Science, de la Iowa State University, en 2006
publishDate 2006
dc.date.none.fl_str_mv 2006
2020-03-16T15:06:38Z
2020-03-16T15:06:38Z
dc.type.none.fl_str_mv info:eu-repo/semantics/doctoralThesis
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_db06
info:ar-repo/semantics/tesisDoctoral
format doctoralThesis
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/6952
https://lib.dr.iastate.edu/rtd/1797/
https://doi.org/10.31274/rtd-180813-15419
url http://hdl.handle.net/20.500.12123/6952
https://lib.dr.iastate.edu/rtd/1797/
https://doi.org/10.31274/rtd-180813-15419
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Iowa State University
publisher.none.fl_str_mv Iowa State University
dc.source.none.fl_str_mv reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.559606