Results 141 to 150 of about 1,437 (175)
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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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DTPA AND MEHLICH-3 MICRONUTRIENT EXTRACTABILITY IN NATURAL SOILS
Communications in Soil Science and Plant Analysis, 2002Most soils of the humid area in the Iberian Peninsula are characterized by acid, desaturated, organic rich surface horizons. In this study micronutrients (Cu, Fe, Mn and Zn) were extracted using DTPA and Mehlich-3. Total contents were also determined by digestion with nitric acid.
Raquel Caridad Cancela +2 more
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Mehlich 3 or modified olsen for soil testing in Malawi
Communications in Soil Science and Plant Analysis, 1999Abstract Soil nutrient extraction methods, which are currently being used in Malawi, are time consuming and require too many resources. The use of a universal soil extractant would greatly reduce resource requirements. The objectives of the study were to (i) compare the universal soil extractants, Mehlich 3 (M3) and Modified Olsen (MO) with ammonium ...
A. D. C. Chilimba +2 more
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Organic P in soil and its extraction by Mehlich 3 method.
2023Phosphorus (P) is limiting plant nutrient in natural and agriculturally used soils. P is presented in soil composition of various inorganic (mineral) and organic compounds.  Organic P compounds are very strongly adsorbed on the mineral surfaces and are therefore not available to the plants.
Tõnis Tõnutare +4 more
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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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Determination of phosphorus in calcareous soils by mehlich 3, mehlich 2, cal, and egner extractants
Communications in Soil Science and Plant Analysis, 2000Abstract Acid extractants were found to be a problem when determining phosphorus in some soils especially in soils with a higher content of carbonates. Carbonate content, soil pH or extractable calcium cannot exactly predict the behavior of a particular soil.
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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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Estimating soil phosphorus sorption saturation from Mehlich-3 data
Communications in Soil Science and Plant Analysis, 2002Soil phosphorus sorption saturation (Psat) measures the degree to which soil phosphorus (P) sorption sites have been filled and has been found to be a good indicator of P availability to runoff and leachate. At present, analytical methods required to estimate Psat are generally not offered by soil testing laboratories.
Peter J. A. Kleinman, Andrew N. Sharpley
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COMPARISON OF BRAY-1 AND MEHLICH-3 TESTS IN HIGH PHOSPHORUS SOILS
Soil Science, 2005Soil testing forms the basis for both agronomic recommendations and phosphorus (P) runoff risk assessment. Although several studies point to good linear correlations between Bray-1 and Mehlich-3 P in the agronomic soil test range, it is not known how these tests compare for soils that test very high in P and are of environmental concern. Our objectives
Q. M. Ketterings, M. Flock
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