Výsledky vyhledávání

Underestimation of Available Phosphorus by Resin–Bicarbonate and Olsen Tests in Calcareous Soils treated with Gypsum

Autor: S. H. Chien, C. G. Calvo, E. R. Austin

Publikováno v: Communications in Soil Science and Plant Analysis. 40:1924-1936

In the present study, Olsen [0.5 M sodium bicarbonate (NaHCO3), pH 8.5] and resin–bicarbonate (HCO3) tests underestimated available phosphorus (P) in calcareous soils treated with gypsum (CaSO4). The reaction of CaSO4 and HCO3 − ion or resin–HC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5fd9ef906693428ef0900bdd4f7e6ff9
https://doi.org/10.1080/00103620902896803

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Characterization and Greenhouse Evaluation of Brazilian Calcined Nonapatite Phosphate Rocks for Rice

Autor: E. A. B. Francisco, S. H. Chien, Luís Ignácio Prochnow, R. W. Taylor, E. R. Austin, Maria Cristina Motta de Toledo

Publikováno v: Agronomy Journal. 100:819-829

Little information is available on the agronomic effectiveness of calcined nonapatite phosphate rock (PR) sources containing crandallite minerals in the form of Ca-Fe-Al-P for flooded and upland rice (Oryza saliva L.). We conducted laboratory and gre

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a29c844109c3692149489af7e2517b80
https://doi.org/10.2134/agronj2007.0209

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Plant Availability of Phosphorus in Four Superphosphate Fertilizers Varying in Water-Insoluble Phosphate Compounds

Autor: G. Carmona, Luís Ignácio Prochnow, E. R. Austin, S. H. Chien, E. F. Dillard, J. Henao

Publikováno v: Soil Science Society of America Journal. 72:462-470

There is concern that the use of lower quality phosphate rock can result in elevated amounts of Fe-Al-P water-insoluble compounds in fertilizers and, consequently, low agronomic effectiveness. Therefore, studies were conducted to evaluate the effect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::82e2ddbe12e0217ddcc2102a7a9a3991
https://doi.org/10.2136/sssaj2006.0421

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Agronomic Effectiveness of Cationic Phosphate Impurities Present in Superphosphate Fertilizers as Affected by Soil pH

Autor: J. E. Corrente, E. R. Austin, Luís Reynaldo Ferraciú Alleoni, S. H. Chien, Luís Ignácio Prochnow, G. Carmona

Publikováno v: Communications in Soil Science and Plant Analysis. 37:2057-2067

The general concept that low‐water‐soluble phosphorus (P) fertilizers should be more agronomically effective when applied to acidic soils was developed based on sources containing mainly calcium (Ca)‐P compounds, but it may not hold true for so

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d107d6a87eafc4ddb80c73954251c5e
https://doi.org/10.1080/00103620600770417

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Cadmium Availability from Granulated and Bulk-Blended Phosphate-Potassium Fertilizers

Autor: E. R. Austin, G. Carmona, S. H. Chien, Luís Ignácio Prochnow

Publikováno v: Journal of Environmental Quality. 32:1911-1914

Recent field experiments have shown that high chloride (Cl) in irrigation waters can increase soil cadmium (Cd) uptake by crops because of the formation of soluble ion-pair complexes of Cd with Cl in soil solution. The present study was aimed at test

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c1b8400ce60d99f552499aa44d3ae71
https://doi.org/10.2134/jeq2003.1911

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