AP500A - A nutrient for the leaching of metal values from an ore - Google Patents
A nutrient for the leaching of metal values from an ore Download PDFInfo
- Publication number
- AP500A AP500A APAP/P/1994/000668A AP9400668A AP500A AP 500 A AP500 A AP 500A AP 9400668 A AP9400668 A AP 9400668A AP 500 A AP500 A AP 500A
- Authority
- AP
- ARIPO
- Prior art keywords
- mass
- parts
- potassium
- nitrogen
- phosphorus
- Prior art date
Links
- 235000015097 nutrients Nutrition 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 title claims description 15
- 239000002184 metal Substances 0.000 title claims description 15
- 238000002386 leaching Methods 0.000 title claims description 11
- 239000000203 mixture Substances 0.000 claims abstract description 44
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 144
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 76
- 239000011591 potassium Substances 0.000 claims description 76
- 229910052700 potassium Inorganic materials 0.000 claims description 76
- 229910052757 nitrogen Inorganic materials 0.000 claims description 72
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 71
- 239000011574 phosphorus Substances 0.000 claims description 71
- 229910052698 phosphorus Inorganic materials 0.000 claims description 71
- 238000000034 method Methods 0.000 claims description 20
- 241000605222 Acidithiobacillus ferrooxidans Species 0.000 claims description 18
- 239000000470 constituent Substances 0.000 claims description 14
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 7
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims description 7
- 239000001166 ammonium sulphate Substances 0.000 claims description 7
- 235000011130 ammonium sulphate Nutrition 0.000 claims description 7
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 7
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 7
- 239000001120 potassium sulphate Substances 0.000 claims description 7
- 235000011151 potassium sulphates Nutrition 0.000 claims description 7
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims description 6
- 235000019837 monoammonium phosphate Nutrition 0.000 claims description 6
- 239000006012 monoammonium phosphate Substances 0.000 claims description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 4
- 239000000460 chlorine Substances 0.000 claims description 4
- 229910052801 chlorine Inorganic materials 0.000 claims description 4
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 claims description 4
- 229910000388 diammonium phosphate Inorganic materials 0.000 claims description 4
- 231100000331 toxic Toxicity 0.000 claims description 4
- 230000002588 toxic effect Effects 0.000 claims description 4
- 239000005696 Diammonium phosphate Substances 0.000 claims description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 3
- YYRMJZQKEFZXMX-UHFFFAOYSA-N calcium;phosphoric acid Chemical compound [Ca+2].OP(O)(O)=O.OP(O)(O)=O YYRMJZQKEFZXMX-UHFFFAOYSA-N 0.000 claims description 3
- 239000004202 carbamide Substances 0.000 claims description 3
- 235000019838 diammonium phosphate Nutrition 0.000 claims description 3
- 239000002426 superphosphate Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 1
- YYRMJZQKEFZXMX-UHFFFAOYSA-L calcium bis(dihydrogenphosphate) Chemical compound [Ca+2].OP(O)([O-])=O.OP(O)([O-])=O YYRMJZQKEFZXMX-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Microbiology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Geology (AREA)
- Biotechnology (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Fodder In General (AREA)
- Fertilizers (AREA)
Abstract
A nutrient composition in dried form for supporting the growth
Description
BACKGROUND OF THE INVENTION
This invention relates to a nutrient composition for supporting the growth of thiobacillus ferrooxidans in a process for the leaching of metal values from an ore or the like containing the metal values.
It is well known that the leaching of metal values, particularly gold values, from an ore or the like containing the metal values, may be facilitated by using a microorganism such as thiobacillus ferrooxidans. Thiobacillus ferrooxidans renders the ore or the like more amenable to leaching by various chemical constituents. In this process, it is necessary to provide the thiobacillus ferrooxidans or other microorganism with the nutrients needed for growth. Generally, these nutrients have been provided by adding into the process prior to the leaching tanks or the like various compounds and compositions, generally in solution, to provide the desired level of nutrients. There is a need for a simpler method of providing the thiobacillus ferrooxidans or other microorganism with the nutrients needed for growth.
AP/P/ 94/00668
ΑΡ ο η 5 ο Ο
SUMMARY OF THE INVENTION
According to a first aspect of the invention there is provided a nutrient composition in dry form for supporting the growth of thiobacillus ferrooxidans in a process for the leaching of metal values from an ore or the like containing the metal values which comprises:
a source of nitrogen providing 37 to 71 parts inclusive by mass of nitrogen per
100 parts by mass of nitrogen, phosphorus and potassium;
a source of phosphorus providing 9 to 21 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium;
a source of potassium providing 20 to 54 parts inclusive by mass of potassium per
100 parts by mass of nitrogen, phosphorus and potassium;
less than 2500 ppm by mass of chlorine and no other constituents which are toxic to thiobacillus ferrooxidans.
According to a second aspect of the invention there is provided a process for the leaching of metal values from an ore or the like containing the metal values in the presence of thiobacillus ferrooxidans, using a nutrient composition as described above.
DESCRIPTION OF EMBODIMENTS
The invention provides a nutrient composition, in dry form, for supporting the growth of thiobacillus ferrooxidans in a process for the leaching of metal values, for example gold values, from an ore or the like, for example mineral tailings, containing the metal values. The composition must include:
a source of nitrogen providing 37 to 71 parts inclusive by mass of nitrogen per 100 parts by mass of the combination of nitrogen, phosphorus and potassium; a source of phosphorus providing 9 to 21 parts inclusive by mass of phosphorus per 100 parts by mass of the combination of nitrogen, phosphorus and potassium; and a source of potassium providing 20 to 54 parts inclusive by mass of potassium per 100 parts by mass of the combination of nitrogen, phosphorus and potassium;
AP/P/ 9 4/ 0 0 6 68
Preferably, the composition comprises:
AP. 00500 a source of nitrogen providing 41 to 67 parts inclusive by mass, more preferably 49 to 59 parts inclusive by mass, most preferably about 54 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 11 to 19 parts inclusive by mass, more preferably 13 to 17 parts inclusive by mass, most preferably about 15 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing 20 to 45 parts inclusive by mass, preferably 22 to 40 parts inclusive by mass, more preferably 28 to 34 parts inclusive by mass, most preferably about 31 parts by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
Another preferred composition of the invention comprises a source of nitrogen providing about 43 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing about 12 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing about 45 parts by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
The composition must also contain less than 2500 ppm by mass of chlorine and no other constituents which are toxic to the growth of thiobacillus ferrooxidans.
The composition is preferably provided as a dry granular mix.
The composition preferably comprises:
Constituent (a) selected from the group consisting of monoammonium phosphate (NH4H2PO4), diammonium phosphate (NH4)2HPO4) and superphosphate (a mixture of gypsum and calcium phosphate, monobasic);
Constituent (b) which is potassium sulphate; and
Constituent (c) selected from the group consisting of ammonium sulphate (NH4)2 SO4) and urea (CO/NH^.
AP/P/ 9 4 / 0 06 68
The composition preferably comprises a combination of monoammonium
Ar’ Γ n j θ q phosphate, potassium sulphate and ammonium sulphate.
An example of a specific composition of the invention will now be given.
Potassium sulphate 5,71 kg
Ammonium Sulphate 14,75 kg
Monoammonium phosphate 4,54 kg
25,00 kg
The above composition was used at the Fairview Mine in Barberton, South Africa as follows.
150 kg of the composition was mixed with 5m3 of water in a mixing tank. This solution was then bled continuously into the Biox process (which comprises leaching of gold values from an ore using thiobacillus ferrooxidans) to support the growth of the thiobacillus ferrooxidans. The solution as described above was made up for each 8 hour shift. Thus in one day’s operation (24 hours) 450 kg of the composition was used to treat 40 tons of continuously fed slurry concentrate through the Biox process.
Another specific example of the composition of the invention containing N:P:K in the weight ratio of 43:12:45 has found application in a similar process in Ghana.
The composition of the invention has the advantage that it provides thiobacillus ferrooxidans with the correct balance of nutrients to sustain growth optimally. Further, the composition of the invention is easy to manufacture, transport, store and use.
Claims (18)
- A nutrient composition in dry form for supporting the growth of thiobacillus ferrooxidans in a process for the leaching of metal values from an ore or the like containing the metal values comprises:a source of nitrogen providing 37 to 71 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 9 to 21 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; a source of potassium providing 20 to 54 parts inclusive by mass of potassium per <o100 parts by mass of nitrogen, phosphorus and potassium;less than 2 500ppm by mass of chlorine and no other constituents which are toxic O to thiobacillus ferrooxidans. _
- 2.A composition according to claim 1 which comprises a source of potassium providing 20 to 45 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium
- 3.A composition according to claim 2 which comprises a source of nitrogen providing 41 to 67 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 11 to 19 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing 22 to 40 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.η 50 0ΑΡ η
- 4.A composition according to claim 3 which comprises a source of nitrogen providing 49 to 59 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 13 to 17 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing 28 to 34 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
- 5.A composition according to claim 4 which comprises a source of nitrogen providing about 54 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing about 15 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing about 31 parts by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
- 6.A composition according to claim 1 which comprises a source of nitrogen providing about 43 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phospherus providing about 12 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing about 45 parts by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.8 9 9 0 0 / V 6 /d/dV
- 7.A composition according to any one of claims 1 to 6 which is a dry granular mix.
- 8.A composition according to any one of claims 1 to 7 wherein the composition comprises constituent (a) selected from the group consisting of monoammonium phosphate, diammonium phosphate and superphosphate; constituent (b) which is potassium sulphate; and constituent (c) selected from the group consisting ofAP fin 5 o q ammonium sulphate and urea.
- 9.A composition according to any one of claims 1 to 7 which comprises a combination of monoammonium phosphate, potassium sulphate and ammonium sulphate.
- 10.A process for the leaching of metal values from an ore or the like containing the metal values in the presence of thiobacillus ferrooxidans, using a nutrient composition in dry form for supporting the growth of thiobacillus ferrooxidans, which composition comprises:a source of nitrogen providing 37 to 71 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 9 to 21 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; a source of potassium providing 20 to 54 parts inclusive inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium; less than 2 500ppm by mass of chlorine and no other constituents which are toxic to thiobacillus ferrooxidans.c
- 11·A process according to claim 10 wherein the composition comprises a source of potassium providing 20 to 45 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
- 12.A process according to claim 11 wherein the composition comprises a source of nitrogen providing 41 to 67 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 11 to 19 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing 22 to 40 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus andAP/P/ 9 4 / 0 0 6 68ΑΡ Π η 5ο Ο potassium.'Λ
- 13.A process according to claim 12 wherein the composition comprises a source of nitrogen providing 49 to 59 parts inclusive by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing 13 to 17 parts inclusive by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing 28 to 34 parts inclusive by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.
- 14.A process according to claim 13 wherein the composition comprises a source of nitrogen providing about 54 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing about 15 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing about 31 parts by mass of potassium by 100 parts by mass of nitrogen, phosphorus and potassium.
- 15.A process according to claim 10 wherein the composition comprises a source of nitrogen providing about 43 parts by mass of nitrogen per 100 parts by mass of nitrogen, phosphorus and potassium; a source of phosphorus providing about 12 parts by mass of phosphorus per 100 parts by mass of nitrogen, phosphorus and potassium; and a source of potassium providing about 45 parts by mass of potassium per 100 parts by mass of nitrogen, phosphorus and potassium.AP/P/ 9 4/ 0 0 6 68
- 16.A process according to any one of claims 10 to 15 wherein the composition is a dry granular mix.
- 17.A process according to any one of claims 10 to 16 wherein the composition comprises constituent (a) selected from the group consisting of monoammonium phosphate, diammonium phosphate and superphosphate; constituent (b) which is potassium sulphate; and constituent (c) which is selected from the group consisting of ammonium sulphate and urea.
- 18.A process according to claim 17 wherein the composition comprises a combination of monoammonium phosphate, potassium sulphate and ammonium sulphate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA936123 | 1993-08-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AP9400668A0 AP9400668A0 (en) | 1994-10-31 |
| AP500A true AP500A (en) | 1996-06-05 |
Family
ID=25583150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| APAP/P/1994/000668A AP500A (en) | 1993-08-20 | 1994-08-17 | A nutrient for the leaching of metal values from an ore |
Country Status (4)
| Country | Link |
|---|---|
| AP (1) | AP500A (en) |
| AU (1) | AU680007B2 (en) |
| BR (1) | BR9403280A (en) |
| ZA (1) | ZA946041B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004431A1 (en) * | 1978-03-23 | 1979-10-03 | Interox Chemicals Limited | Bacterial leaching of minerals |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1214043A (en) * | 1983-01-26 | 1986-11-18 | Albert Bruynesteyn | Biological-acid leach process |
| AU618177B2 (en) * | 1990-03-27 | 1991-12-12 | Biomin Technologies Sa | Biological oxidation of sulfide ore |
-
1994
- 1994-08-11 ZA ZA946041A patent/ZA946041B/en unknown
- 1994-08-16 AU AU70279/94A patent/AU680007B2/en not_active Ceased
- 1994-08-17 AP APAP/P/1994/000668A patent/AP500A/en active
- 1994-08-19 BR BR9403280A patent/BR9403280A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0004431A1 (en) * | 1978-03-23 | 1979-10-03 | Interox Chemicals Limited | Bacterial leaching of minerals |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9403280A (en) | 1995-04-11 |
| ZA946041B (en) | 1995-03-16 |
| AP9400668A0 (en) | 1994-10-31 |
| AU680007B2 (en) | 1997-07-17 |
| AU7027994A (en) | 1995-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11254622B2 (en) | NPK-Si-humate fertilizer, method for production and use thereof | |
| US5112379A (en) | Multicomponent soil supplement | |
| Kudoyarova et al. | Comparison of the effects of nitrate and ammonium forms of nitrogen on auxin content in roots and the growth of plants under different temperature conditions | |
| EP2674411B1 (en) | Method for obtaining a biological fertilizer from apatite minerals by means of microorganisms and biological fertilizer thus obtainded | |
| CA1208028A (en) | Delivery of plant nutrients | |
| AP500A (en) | A nutrient for the leaching of metal values from an ore | |
| CN105085004A (en) | Compound fertilizer for mercury contaminated soil and preparation method therefor and application thereof | |
| Zoysa et al. | Effect of forms of nitrogen supply on mobilisation of phosphorus from a phosphate rock and acidification in the rhizosphere of tea | |
| US5597399A (en) | Soil enhancing compound and method for producing same | |
| US4547213A (en) | Rock phosphate/sulfur fertilizer composition | |
| Line | Compost recycling of wood fiber waste produced by paper manufacture | |
| US3525602A (en) | Process for producing salt suspension fertilizers | |
| GB2176177A (en) | Plant fertilizer | |
| SU1087503A1 (en) | Method for producing suspended mineral fertilizers | |
| US3206298A (en) | Fertilizer suspension comprising phosphate rock and nitrogen-containing liquid | |
| RU2216528C1 (en) | Method for preparing fertilizer | |
| SU682488A1 (en) | Method of the preparation of suspended fertilizers | |
| Gjoka et al. | Effect of inorganic amendments on growth of ryegrass and properties of a sandy soil | |
| SU954376A1 (en) | Method of producing liquid complex fertilizerz | |
| SU1680682A1 (en) | Process for preparing chalkstone meliorant suspension | |
| Gruener et al. | Zeoponic plant growth substrate development at the Johnson space center and possible use at a Martian outpost | |
| Keefer et al. | Amelioration of acid soils with fly ash | |
| CS257774B2 (en) | Method of organomineral limy fertilizers production | |
| ES8102072A1 (en) | Plant fertilizing and growth activating structures and applications thereof | |
| US1274343A (en) | Fertilizing method and material. |