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Showing 1 to 20 of 23 for “"Mehlich 3"”.
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Disponibilidade de zinco, para milho, pelos extratores Mehlich-1, Mehlich-3 e DTP
… objetivou-se avaliar a eficiência dos extratores Mehlich-1, Mehlich-3 e DTPA quanto à disponibilidade de zinco em solos de Minas Gerais, com características químicas e físicas variáveis, na ausência e presença de calagem. Os tratamentos foram arranjados em esquema fatorial 7x2x5, correspondendo a …
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Copper adsorption/desorption characteristics on copper amended soils
… The study also assessed the capability of Mehlich-3 to estimate deficient and toxic Cu levels in soil. Application of Cu as manure or CuSO₄ did not affect grain yield or grain Cu concentration in corn grown at each site. Young corn plant height was reduced by CuSO₄ application on the Bertie …
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Correction and diagnosis of boron deficiency in corn
… boron concentration of 0.56 mg kg⁻¹ and a Mehlich 3 extractable boron concentration of 0.78 mg kg⁻¹. The six soils for which boron application did not increase yields had hot water soluble boron concentrations from 0.55 to 0.92 mg kg⁻¹ and Mehlich 3 extractable boron concentrations from …
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Effect of Synthetic Chelating Agent Application to Soils on Phosphorus Availability
… their influence on water-soluble P (WSP), Mehlich-1 P and Mehlich-3 P in Loam and Sand soils fertilized with P and incubated for 49 days. Soil P sorption capacity (PSC) was estimated from an oxalate extraction of Fe and Al, and chelates were applied at rates of 90 percent of the PSC. The …
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Disponibilidade de micronutrientes em solos e sua correlação com teores foliares em povoamentos jovens de eucalipto
… pH e os teores de Cu, Mn, Fe e Zn extraídos por Mehlich-1, Mehlich-3 e DTPA. Nas folhas, foram determinados os teores de Cu, Mn, Fe e Zn. Os maiores teores de Cu, Mn, Fe e Zn do solo foram obtidos com os extratores Mehlich-1 e Mehlich-3 e os menores com DTPA. Os teores de Cu, Fe e Zn pelos …
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Relationships of soil test phosphorus with soil properties and phosphorus forms
… four widely used soil extractants, i.e., Bray 1, Mehlich 1, Mehlich 3, and Olsen, represented less than 25 percent of the total P content in 43 Virginia soils from the Coastal Plain, Piedmont, and Ridge and Valley regions. Correlation between Bray 1 (1 minute and 5-minute shaking), Mehlich 1, and …
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Response of corn to high levels of CuSO₄ and ZnSO₄ applications
… Cu and Zn were extracted from the soil by the Mehlich-3 method than by the DTPA method. This higher rate of extraction was attributed to the ethylenediaminetetraacetic acid (EDTA) in the Mehlich-3 solution.
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Disponibilidade de ferro em solos tropicais e sua absorção pela planta
… O Fe foi extraído pelos extratores Mehlich-1, Mehlich-3 e em CaCl2 (Fe-CC). Realizou-se o fracionamento das formas de Fe relacionadas aos oxihidróxidos pedogênicos de baixa (Feo) e alta (Fed) cristalinidade, bem como aquele ligado a matéria orgânica (Fep), utilizando-se, …
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Long-term Effects of Fertilization on Phosphorus Biogeochemical Pools in Forest Soils
… Hedley sequential fractionation procedure and Mehlich-3 soil tests in a long-term loblolly pine (Pinus taeda L.) fertilization trial from four sites in the Atlantic and Gulf Coastal Plains. After 22 years, fertilization effects were limited to the surface depths. Mehlich-3 extractable P was …
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Impact of Surface Application of Flue Gas Desulfurization Gypusum on Infiltration, Phophorus Behavior, and Total Sulfur in a Previously Manured Coastal Plain Soil
… Linear relationships were established between Mehlich 3 (M3) and ammonium oxalate extractions of P and aluminum (Al) (r2 = 0.83, 0.56, respectively), supporting previous research on the reliability of M3 in place of ammonium oxalate to predict P loss. One year after FGD gypsum application total …
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Soybean Yield and Plant Response to Phosphorus Fertilization
… samples were analyzed for Olsen, Bray-P1 and Mehlich 3 P. There were no significant differences in yield across locations in either year of the study. Grain P concentration increased at higher P rates. Failing to remove the petiole diluted trifoliolate P concentration by 15 to 18% . Improper …
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Changes in Leaf Area and Nutrient Content of Celtis spp. Across a Precipitation Gradient in Texas
… concentrations of soil mineral nutrients using Mehlich-3 analysis. Only two species were common enough to be included in the analysis. Of the three species, Celtis reticulata had the widest distribution and showed a significant change in LA, SLA, and the C/N ratio with changes in precipitation. …
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Adsorção e disponibilidade de arsênio em solos com diferentes composições mineralógicas
… avaliada por meio de cinco extratores químicos: Mehlich 1, Mehlich 3, Ca(H2PO4)2 (7,43 mmol L-1 de Ca(H2PO4)2 em ácido acético), DTPA e resina trocadora de ânions (AR 103-QDP). Amostras da fração argila de cada solo foram submetidas à análise de difração de Raios-X e análise termogravimétrica …
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Chemical Fractions And Predictions For Long-term Releases of Phosphorus In Typical Canadian Agricultural Soils
… areas across Canada, and analyzed using Mehlich-3, Olsen, Resin strips (RMS), FeO-strips, and new procedures: various combinations of NaOH with and without EDTA, with four shaking periods. Statistically significant linear and quadratic relationships between the RMS and NaOH with EDTA-P …
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Liquid swine manure as a phosphorus source for corn-soybean rotation
… three routine soil-P tests (Bray-1 P, Olsen, and Mehlich 3 P), and two environmental tests (Iron-oxide and Water extraction). The second study used a strip-trial methodology using precision agriculture technologies and its objective was to compare three statistical methods (classical, …
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Samanburður á sýnatökudýpt, skolaðferðum og ýmsum eiginleikum jarðvegs fyrir mismunandi plöntunæringarefni: Til að styrkja áburðarleiðbeiningar fyrir íslenska bændur
… verið notuð á Íslandi í áratugi og hins vegar Mehlich 3 (M3), nýrri aðferð sem var þróuð til þess að skola út snefilefni, jafnt sem aðalnæringarefni úr jarðvegi. Tilraun var gerð til að flokka næringarefni jarðvegsins eftir sýrustigi, rúmþyngd eða lífrænu innihaldi hans. Línuleg fylgni var gerð …
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Switchgrass Cultivar, Harvest Frequency, Fertilizer Source, and Irrigation Effects on Near-Surface Soil Properties in West-Central Arkansas
… water stable aggregates (TWSA), soil pH and EC, Mehlich-3 extractable soil nutrients, root density, and surface infiltration. Irrigating switchgrass, which did not increase past biomass production, increased (<em>p</em> > 0.01) soil bulk density in treatment combinations where poultry litter was …
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Characterization of Problematic Red Clay Soils in Arkansas for the Purpose of Onsite Wastewater System Placement
… As an often-used indicator of expansiveness, the Mehlich-3-estimated cation exchange capacity (CEC-M), excluding any contribution from soil organic matter, was larger (24.5 cmolc kg-1; P < 0.01) for soils from the Red and Arkansas Rivers region than for soils from all four other regions evaluated. …
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Plant and soil effects from the surface application of poultry litter to unmanaged pasture
… mixed thermic Fluventic Dystrochrepts) by the Mehlich 3 (M3) and Bray 1 (Bl) soil tests. Dry matter yields increased curvilinearly with rate of PL application. This yield increase was attributed to correction of N deficiency in pasture by the PL application. Lower levels of PL increased forage …
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Long-Term Effects of Rice Rotation, Tillage, and Fertility on Near-Surface Soil Carbon and Nitrogen Cycling
… resistance), soil chemical properties (Mehlich-3 extractable nutrients, pH, and electrical conductivity), and soil surface carbon dioxide (CO2) respiration. Results showed that SOM, total C, and total N concentrations increased over time under the NT treatment and in all rotations that …
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