Global programs / NIFTAL
Although previous studies confirm that low levels of phosphorus (P) and high levels of aluminum (Al) are important soil acidity factors for the growth of higher plants, little is known about their effect on rhizobia. This report details an investigation to determine the effects of low P, low pH, and high Al on the survival and growth rate of selected rhizobia strains and to rate the probable importance of the three stresses in inhibiting rhizobial growth. Tolerance of each stress was assessed for 75 strains of cowpea rhizobia and soybean rhizobia (Rhizobium japonicum) by both detailed growth studies in defined liquid media (10 strains) and a rapid method based on attainment of turbidity from a small inoculum (65 strains). Rhizobia strains were found to vary widely in response to stress. Aluminum was found to be particularly potent; it increased the lag time or slowed growth of almost all strains and virtually stopped growth of 40%. These data verify recent evidence that some strains of slow-growing rhizobia can survive high concentrations of Al, but the large reduction in growth rate shown here could be critical for colonization of soil and rhizosphere and for induction of nodulat
Source: DEC abstract, PN-AAJ-948 (1979). The source's own text.
Operated in: Hawaii, Uganda, Southern Africa, Africa, Latin America, Oceania, Philippines, Asia, India, Kenya, Democratic Republic of the Congo.
When the program ran, from its start year to the latest document year. A hatched bar means the start is our estimate.
Axis: years in documents. The start year comes from first seen; the end is the latest document year, so the program may have run longer.
A few documents to read first. Each opens in the side panel, with the PDF to download.
Showing 10 of 25 documents.
| Name | Role | Years | Basis | Evidence |
|---|---|---|---|---|
| University of Hawaii at Manoa. College of Tropical Agriculture and Human Resources | implementer | 1977 to 1981 | Stated in a document | 11 sources |
| University of Hawaii at Manoa. College of Tropical Agriculture and Human Resources. Dept. of Agronomy and Soil Science | implementer | 1978 to 1989 | Stated in a document | 8 sources |
Awards, topics, similar programs and how to read this page.
Scope: global. How the scope was set is not described yet. High confidence.
How sure we are: 0.95.
| Name | Years | Basis | Evidence |
|---|---|---|---|
| AID/TA-C-1207 (contract, fiscal year not recorded) | 1977 to 1984 | Stated in a document | 21 sources |
| University of California, Davis. Dept. of Land, Air, and Water Resources | implementer | 1979 to 1982 | Stated in a document | 6 sources |
| University of Hawaii at Manoa. College of Tropical Agriculture and Human Resources. Hawaii Institute of Tropical Agriculture and Human Resources | implementer | 1985 | Stated in a document | 1 source |
| University of Hawaii at Manoa | implementer | 1983 | Stated in a document | 1 source |
| Name | Years | Basis | Evidence |
|---|---|---|---|
| Hawaii | 1977 to 1984 | Stated in a document | 4 sources |
| Uganda | 1977 to 1984 | Stated in a document | 3 sources |
| Southern Africa | 1984 | Stated in a document | 1 source |
| Africa | 1986 | Stated in a document | 1 source |
| Latin America | 1986 | Stated in a document | 1 source |
| Oceania | 1984 | Stated in a document | 1 source |
| Philippines | 1984 | Stated in a document | 1 source |
| Asia | 1986 | Stated in a document | 1 source |
| DAN-0613-C-2064 (contract, fiscal year not recorded) | 1984 to 1989 | Stated in a document | 5 sources |
| AID/DSAN-G-0100 (grant, fiscal year not recorded) | 1983 to 1984 | Stated in a document | 2 sources |
| Name | Years | Basis | Evidence |
|---|---|---|---|
| Technical Assistance | 1977 to 1989 | Stated in a document | 28 sources |
Sector profile (computed): Agriculture: research, extension, training, technology 50%; Agriculture: crop production, inputs, pests, irrigation 36%; Program management, planning and administration 4%
DEC topic and subject tags. They describe the documents, not what the program was. Each tag opens its evidence in the drawer.
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35 facts shown; 0 unconfirmed links; 0 support mechanisms (not programs); 28 documents cite this program.
Program key prj:9310613
No quote: this fact comes from a metadata field, shown as stored.
No quote: this fact comes from a metadata field, shown as stored.
No quote: this fact comes from a metadata field, shown as stored.