Manufacturing Methods &amp; Technology Project Execution Report. First Half CY 80

Hancock, Leslie

doi:10.21236/ada091742

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1983

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“…More than 4 million t of recoverable elemental S are estimated to exist mostly in the sub-surface ore body at Lake Rotokawa, 11 km north-east of Taupo (Hancock 1980). The S content of this ore ranges from 20 to 80% and impurities are mostly illite clay and pumice sand.…”

Section: Introductionmentioning

confidence: 99%

Rotokawa sulphur in phosphate rock/sulphur granules — a greenhouse study

Rājan

1983

New Zealand Journal of Agricultural Research

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Phosphate rock/sulphur granules (pR/S) prepared from Rotokawa S ore upgraded to 950/0 purity and North Carolina PR (NC) were evaluated as phosphate fertilisers in a pot experiment using a highly P-retentive volcanic ash soil limed to pH 5.8. Granules of 2 size ranges, 0.2-1.0 mm and 1-2 mm and 4 PR:S ratios ranging from 3:1 to 6:1 were used. Dry matter yield and P uptake response curves showed that the PR/S prepared using Rotokawa S were as effective as those using flowers of S. Both these products gave almost the same DM yields and P uptakes as superphosphate at equal P input. There was no significant difference in yield between the 2 granule sizes studied. Increasing the PR:S ratio from 3:1 to up to 6: 1 decreased the DM yields to a small but significant extent (P<0.01).

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Section: Introductionmentioning

confidence: 99%

Rotokawa sulphur in phosphate rock/sulphur granules — a greenhouse study

Rājan

1983

New Zealand Journal of Agricultural Research

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Manufacturing Methods & Technology Project Execution Report. First Half CY 80

Cited by 1 publication

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Rotokawa sulphur in phosphate rock/sulphur granules — a greenhouse study

Rotokawa sulphur in phosphate rock/sulphur granules — a greenhouse study

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