Results 171 to 180 of about 2,357 (208)
Journal of Geochemical Exploration, 2011 Abstract The spatial variability and temporal stability of Fe extracted by Mehlich-1 was investigated on an acid rice soil, a typic Plintacualf, under different lime doses and redox potential (Eh) conditions in Corrientes, Argentina. Soil was sampled firstly in aerobic conditions, before sowing and then twice more in anaerobic conditions, i.e.
E Vidal Vazquez, Jorge Paz-Ferreiro
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Mehlich‐1‐ and DTPA‐extractable lead in soils in relation to soil properties
Communications in Soil Science and Plant Analysis, 1997Abstract Mehlich‐1 and DTPA extractants are frequently used to predict metal availability in soils. Metal extractability by the acid or chelate extractant reflects the metal characteristics and metal‐soil interactions. In this study, samples of eight topsoils from the southeastern United States were incubated with added lead (Pb) at the rate of 40 mg ...
Zhenbin Li, Larry M. Shuman
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Using the Mehlich‐1 Extract to Estimate Soil Phosphorus Saturation for Environmental Risk Assessment
Soil Science Society of America Journal, 2004Methods for environmental risk assessment of P loss potential from soils lack uniformity and are generally difficult for routine analysis. Mehlich‐1 extractable P (M1‐P), an approach that is widely used to assess soil P status for plant growth, was used as a soil test P (STP) estimator of the degree of P saturation (DPS) of a soil.
M. A. Beck +3 more
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Soil Science, 1993
Mehlich 1 (M1), Mehlich 3 (M3), and Ammonium Bicarbonate DTPA (AB-DTPA) have been used to determine the available micronutrients in soils. However, the forms of micronutrients extractable by these extractants are not known. The objectives of this study were: (i) to examine the correlation between the forms of Zn or Cu (readily soluble, organically ...
B. ZHU, A. K. ALVA
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Mehlich 1 (M1), Mehlich 3 (M3), and Ammonium Bicarbonate DTPA (AB-DTPA) have been used to determine the available micronutrients in soils. However, the forms of micronutrients extractable by these extractants are not known. The objectives of this study were: (i) to examine the correlation between the forms of Zn or Cu (readily soluble, organically ...
B. ZHU, A. K. ALVA
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Communications in Soil Science and Plant Analysis, 2004
Abstract This study evaluates ion chromatography (IC) as an alternative to atomic absorption (AA) and inductively-coupled plasma spectrometry (ICP) for analysis of potassium (K), magnesium (Mg), and calcium (Ca), and as an alternative to antimonylmolybdate colorimetry and ICP for analysis of phosphorus (P) macro-nutrients in Mehlich 1 extracts.
Joseph B. Fischer, James H. Miller
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Abstract This study evaluates ion chromatography (IC) as an alternative to atomic absorption (AA) and inductively-coupled plasma spectrometry (ICP) for analysis of potassium (K), magnesium (Mg), and calcium (Ca), and as an alternative to antimonylmolybdate colorimetry and ICP for analysis of phosphorus (P) macro-nutrients in Mehlich 1 extracts.
Joseph B. Fischer, James H. Miller
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Communications in Soil Science and Plant Analysis, 2013
Deficiency of micronutrients is increasing in crop plants in recent years in Oxisols and Ultisols in the tropics. The predominant soils in the coastal tablelands of Brazil are Ultisols and Oxisols, with low cation exchange capacity and kaolinitic clay mineralogy.
L. F. Sobral +3 more
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Deficiency of micronutrients is increasing in crop plants in recent years in Oxisols and Ultisols in the tropics. The predominant soils in the coastal tablelands of Brazil are Ultisols and Oxisols, with low cation exchange capacity and kaolinitic clay mineralogy.
L. F. Sobral +3 more
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Communications in Soil Science and Plant Analysis, 2002
Increasing number of soil testing laboratories in the mid-Atlantic and southeastern states of the United States are adopting Mehlich-3 (M-3) as the official extraction procedure in place of Mehlich-1 (M-1) or the dilute double acid method. Several studies have indicated that the M-3 has at least equivalent if not better extractability, particularly of ...
R. S. Mylavarapu +3 more
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Increasing number of soil testing laboratories in the mid-Atlantic and southeastern states of the United States are adopting Mehlich-3 (M-3) as the official extraction procedure in place of Mehlich-1 (M-1) or the dilute double acid method. Several studies have indicated that the M-3 has at least equivalent if not better extractability, particularly of ...
R. S. Mylavarapu +3 more
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Communications in Soil Science and Plant Analysis, 2021
The main Brazilian soil testing laboratories use Mehlich-1 solution for the determination of available potassium in the soil. However, this procedure has chemical and operational limitations.
Magno Batista Amorim +2 more
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The main Brazilian soil testing laboratories use Mehlich-1 solution for the determination of available potassium in the soil. However, this procedure has chemical and operational limitations.
Magno Batista Amorim +2 more
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Communications in Soil Science and Plant Analysis, 2000
Abstract Acid and dilute‐salt chemical extractants are commonly used to assess and adjust phosphorus (P) availability in soils. Soybean was grown for 45 days under greenhouse conditions on samples of 10 Oxisols treated with variable levels of soluble P to compare critical soil P levels between an anion exchange resin (AER) and the Mehlich‐1 extractant,
F.H.T. Oliveira +3 more
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Abstract Acid and dilute‐salt chemical extractants are commonly used to assess and adjust phosphorus (P) availability in soils. Soybean was grown for 45 days under greenhouse conditions on samples of 10 Oxisols treated with variable levels of soluble P to compare critical soil P levels between an anion exchange resin (AER) and the Mehlich‐1 extractant,
F.H.T. Oliveira +3 more
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Stochastic Environmental Research and Risk Assessment, 2011
This study compares the effect of lime additions on the spatial variability of Fe, Mn and Zn extracted by Mehlich-1 during three different growth stages from an acid paddy soil, a Typic Plintacualf, in Corrientes, Argentina. Field trials were set up involving three treatments: control, without lime addition, plus two different dolomite doses of 625 and
Luis Alberto Morales +2 more
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This study compares the effect of lime additions on the spatial variability of Fe, Mn and Zn extracted by Mehlich-1 during three different growth stages from an acid paddy soil, a Typic Plintacualf, in Corrientes, Argentina. Field trials were set up involving three treatments: control, without lime addition, plus two different dolomite doses of 625 and
Luis Alberto Morales +2 more
openaire +1 more source