Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions

Abstract Individual states in the United States have adopted different soil test P (STP) methods for agronomic and environmental purposes. Working between soil regions and state borderlines can be complicated by using multiple STP methods. For example, Alabama uses Mehlich 1 (M1) for noncalcareous s...

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Autores principales:	Anjan Bhatta, Rishi Prasad, Debolina Chakraborty, Joey N. Shaw, Jasmeet Lamba, Eve Brantley, Henry A. Torbert
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	Agriculture S Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/446cd6d5f5214f02adc0b663d4a33c21
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spelling	oai:doaj.org-article:446cd6d5f5214f02adc0b663d4a33c212021-11-24T11:36:04ZMehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions2639-669610.1002/agg2.20187https://doaj.org/article/446cd6d5f5214f02adc0b663d4a33c212021-01-01T00:00:00Zhttps://doi.org/10.1002/agg2.20187https://doaj.org/toc/2639-6696Abstract Individual states in the United States have adopted different soil test P (STP) methods for agronomic and environmental purposes. Working between soil regions and state borderlines can be complicated by using multiple STP methods. For example, Alabama uses Mehlich 1 (M1) for noncalcareous soils (Appalachian Plateau [AP], Coastal Plain [CP], Limestone Valley [LV], Piedmont Plateau [PP]) and Lancaster (La) for calcareous soils (Blackland Prairie [BP]). Mehlich 3 (M3) has been proposed as an efficient and possibly a generic extractant for a broader range of soils. The objective of this study was to evaluate whether M3 can be used as a common or generic extractant for environmental P loss risk assessment for both calcareous and noncalcareous soils. More than 769 soil samples were collected from 68 agricultural fields representing noncalcareous and calcareous soils, and their extraction efficiencies for M1, M3, and La were compared. Mehlich 1 extracted 13.8, 13.1, 6.3, and 6.2% of total P; whereas M3 extracted 29.8, 35.4, 10.5, and 14.8% of total P from AP, CP, LV, and PP, respectively. There was no significant difference between La and M3 extractable P for both acidic and alkaline soils of BP. The conversion factor of 1.42 (95% confidence interval [CI95%] = 1.36–1.47) was found suitable to convert M1‐P to M3‐P values for noncalcareous soils, and 0.92 (CI95% = 0.87–0.98) was suitable to convert La‐P to M3‐P values for calcareous soils. The linear relationship between water‐soluble P (WSP) and extractable P was stronger for M3 than for M1 and La for all soil regions, as indicated by a greater correlation coefficient. Results suggest that M3 can be adopted as a generic extractant for environmental P loss risk assessment for calcareous and noncalcareous soils.Anjan BhattaRishi PrasadDebolina ChakrabortyJoey N. ShawJasmeet LambaEve BrantleyHenry A. TorbertWileyarticleAgricultureSEnvironmental sciencesGE1-350ENAgrosystems, Geosciences & Environment, Vol 4, Iss 3, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Agriculture S Environmental sciences GE1-350
spellingShingle	Agriculture S Environmental sciences GE1-350 Anjan Bhatta Rishi Prasad Debolina Chakraborty Joey N. Shaw Jasmeet Lamba Eve Brantley Henry A. Torbert Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
description	Abstract Individual states in the United States have adopted different soil test P (STP) methods for agronomic and environmental purposes. Working between soil regions and state borderlines can be complicated by using multiple STP methods. For example, Alabama uses Mehlich 1 (M1) for noncalcareous soils (Appalachian Plateau [AP], Coastal Plain [CP], Limestone Valley [LV], Piedmont Plateau [PP]) and Lancaster (La) for calcareous soils (Blackland Prairie [BP]). Mehlich 3 (M3) has been proposed as an efficient and possibly a generic extractant for a broader range of soils. The objective of this study was to evaluate whether M3 can be used as a common or generic extractant for environmental P loss risk assessment for both calcareous and noncalcareous soils. More than 769 soil samples were collected from 68 agricultural fields representing noncalcareous and calcareous soils, and their extraction efficiencies for M1, M3, and La were compared. Mehlich 1 extracted 13.8, 13.1, 6.3, and 6.2% of total P; whereas M3 extracted 29.8, 35.4, 10.5, and 14.8% of total P from AP, CP, LV, and PP, respectively. There was no significant difference between La and M3 extractable P for both acidic and alkaline soils of BP. The conversion factor of 1.42 (95% confidence interval [CI95%] = 1.36–1.47) was found suitable to convert M1‐P to M3‐P values for noncalcareous soils, and 0.92 (CI95% = 0.87–0.98) was suitable to convert La‐P to M3‐P values for calcareous soils. The linear relationship between water‐soluble P (WSP) and extractable P was stronger for M3 than for M1 and La for all soil regions, as indicated by a greater correlation coefficient. Results suggest that M3 can be adopted as a generic extractant for environmental P loss risk assessment for calcareous and noncalcareous soils.
format	article
author	Anjan Bhatta Rishi Prasad Debolina Chakraborty Joey N. Shaw Jasmeet Lamba Eve Brantley Henry A. Torbert
author_facet	Anjan Bhatta Rishi Prasad Debolina Chakraborty Joey N. Shaw Jasmeet Lamba Eve Brantley Henry A. Torbert
author_sort	Anjan Bhatta
title	Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
title_short	Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
title_full	Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
title_fullStr	Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
title_full_unstemmed	Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions
title_sort	mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across alabama soil regions
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/446cd6d5f5214f02adc0b663d4a33c21
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Mehlich 3 as a generic soil test extractant for environmental phosphorus risk assessment across Alabama soil regions

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