1991
DOI: 10.1007/bf01054329
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Partially acidulated reactive phosphate rock (PAPR) fertilizer and its reactions in soil

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1991
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Cited by 13 publications
(8 citation statements)
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“…The formation of MCP on Mars is likely an indicator of the reaction of acid‐sulfate solutions under low fluid:rock ratios so that fluid transport was minimal. Because hydrated MCP alters to brushite in acidic soil environments on Earth [ Golden et al ., ], the presence of hydrated MCP may therefore also indicate the absence of water:rock ratios comparable to such terrestrial soil environments, in which MCP alters to brushite.…”
Section: Discussionmentioning
confidence: 99%
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“…The formation of MCP on Mars is likely an indicator of the reaction of acid‐sulfate solutions under low fluid:rock ratios so that fluid transport was minimal. Because hydrated MCP alters to brushite in acidic soil environments on Earth [ Golden et al ., ], the presence of hydrated MCP may therefore also indicate the absence of water:rock ratios comparable to such terrestrial soil environments, in which MCP alters to brushite.…”
Section: Discussionmentioning
confidence: 99%
“…Under these conditions, the results of this study, consistent with MER Mössbauer data, imply dissolution of primary phosphate phases and precipitation of ferrian giniite. The fact that MCP dissolves rapidly to form brushite under aqueous conditions on Earth [ Golden et al ., ] suggests that under conditions with sufficient fluid transport to allow transport of Fe 3+ bearing acid‐sulfate solutions, MCP would not persist. The larger excess Fe 2 O 3 + FeO for PasoRobles compared to PasoLight1 is attributed to the presence of significant hematite for the former as shown by MB data [ Morris et al ., ].…”
Section: Discussionmentioning
confidence: 99%
“…Observation of temporal P dynamics in the soil and rhizosphere at high spatial resolution is desirable but technically challenging. A few studies have used radioisotopes to monitor P diffusion with time (e.g., Golden, White, Tillman, & Stewart, ). One of the limitations of this technique is that it cannot distinguish between radioactive P in labile‐P and fixed‐P pools.…”
Section: Introductionmentioning
confidence: 99%
“…The diffusion of P to roots occurs over a short distance, typically in the centimeter to sub-millimeter range. In barley, Gahoonia and Nielsen (2003) demonstrated that the effective P-depletion zone is 2.0 to 0.8 mm from the root, corresponding to the root hair length. Observation of temporal P dynamics in the soil and rhizosphere at high spatial resolution is desirable but technically challenging.…”
mentioning
confidence: 99%
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