Global programs / International agricultural research centers (IARCs)
Reviews the present status of weed control in the major tropical root and tuber crops: yams, cassava, sweet potatoes and aroids. The production of tropical root and tuber crops as a whole is hindered by a lack of research in weed control. Crop losses are two to three times greater than in the temperate zones. More than two-thirds of the world's yam crop is produced in the eastern part of West Africa; Nigeria produces almost half the global figures. Yams are generally interplanted with crops such as maize, cowpeas, upland rice, and vegetables on newly cleared land. About 30% of the total labor expended in farm operation, including land clearing, was devoted to weeding on well-run farms in Ghana and West Nigeria. Frequent and effective weeding is one of the first essentials of successful yam cultivation. Herbicides found effective for yams include atrazine, diuron, simazine, nomuron, and ametryne. Cassava, which is replacing yams and cocoyams, is usually the last crop to be planted in a rotation before the land is left to fallow. Labor requirements are less because it is not clean cultivated. Cassava which is kept free of weeds by mechanical means yielded about 10% less than a crop k
Source: DEC abstract, PN-AAE-622 (1974). The source's own text.
Operated in: Nigeria, Africa, West Africa, Africa South of Sahara, Philippines, Ghana, Central Africa, East Africa, Cameroon, Benin, Latin America, Democratic Republic of the Congo, Georgia, Rwanda, Brazil, Ecuador, Southern Hemisphere, Puerto Rico, Asia, India, Thailand, Ivory Coast, Tanzania, Zimbabwe, Malawi, Colombia, Chile.
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.
Evaluation studies and evaluation-type documents linked to this program.
| Title | Year | Type |
|---|---|---|
| Evaluation of cation exchange capacity measurements for soils in the tropics | 1976 | Evaluation-type document |
| Name | Role | Years | Basis | Evidence |
|---|---|---|---|---|
| International Institute of Tropical Agriculture (IITA) | implementer | 1974 to 2001 | Stated in a document | 87 sources |
| International Rice Research Institute (IRRI) | implementer | 1987 to 1989 | Stated in a document | 5 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-G-1185 (grant, fiscal year not recorded) | 1974 to 1977 | Stated in a document |
Showing 10 of 65 documents.
Showing 10 of 16 documents.
| International Development Research Centre (IDRC) |
| implementer |
| 1987 to 1993 |
| Stated in a document |
| 2 sources |
| International Livestock Centre for Africa | implementer | 1986 to 1992 | Stated in a document | 2 sources |
| North Carolina State University. Dept. of Plant Pathology | implementer | 1978 to 1982 | Stated in a document | 2 sources |
| International Center for Tropical Agriculture (CIAT) | implementer | 1986 to 1987 | Stated in a document | 2 sources |
| Consultative Group on International Agricultural Research (CGIAR) | implementer | 1987 | Stated in a document | 1 source |
| U.N. Food and Agriculture Organization (FAO) | implementer | 1995 | Stated in a document | 1 source |
| Name | Role | Years | Basis | Evidence |
|---|---|---|---|---|
| International Institute of Tropical Agriculture. Library and Documentation Center | implementer | 1979 | Stated in a document | 1 source |
| International Service for National Agricultural Research (ISNAR) | implementer | 1989 | Stated in a document | 1 source |
| International Institute of Tropical Agriculture. International Grain Legume Information Centre | implementer | 1987 | Stated in a document | 1 source |
| National Cereals Research Institute | implementer | 1986 | Stated in a document | 1 source |
| CAB International (CABI) | implementer | 1991 | Stated in a document | 1 source |
| International Potato Center (CIP) | implementer | 1986 | Stated in a document | 1 source |
| United Nations Development Programme (UNDP) | implementer | 1986 | Stated in a document | 1 source |
| Name | Role | Years | Basis | Evidence |
|---|---|---|---|---|
| Cameroon. Ministry of Higher Education and Scientific Research. Institute of Agronomic Research | lead ministry | 1987 | Likely, not confirmed | 1 source |
| Name | Years | Basis | Evidence |
|---|---|---|---|
| Nigeria | 1974 to 1999 | Stated in a document | 24 sources |
| Africa | 1975 to 1995 | Stated in a document | 16 sources |
| West Africa | 1975 to 2000 | Stated in a document | 8 sources |
| Africa South of Sahara | 1979 to 1997 | Stated in a document | 7 sources |
| Philippines | 1987 to 1989 | Stated in a document | 6 sources |
| Ghana | 1982 to 2000 | Stated in a document | 5 sources |
| Central Africa | 1980 to 2001 | Stated in a document | 4 sources |
| East Africa | 1993 to 2001 | Stated in a document | 3 sources |
| 28 sources |
| AID/TA-G-1491 (grant, fiscal year not recorded) | 1975 to 1978 | Stated in a document | 4 sources |
| AID/TA-C-1234 (contract, fiscal year not recorded) | 1978 to 1982 | Stated in a document | 2 sources |
| AID/DSAN-G-0078 (grant, fiscal year not recorded) | 1979 | Stated in a document | 1 source |
| AID/TA-G-1251 (grant, fiscal year not recorded) | 1976 | Stated in a document | 1 source |
| LAG-4111-G-2027 (grant, fiscal year not recorded) | 1993 | Stated in a document | 1 source |
| LAG-4111-G-3042 (grant, fiscal year not recorded) | 2001 | Stated in a document | 1 source |
| WA80-200 (award, fiscal year not recorded) | 1980 | Stated in a document | 1 source |
| Name | Years | Basis | Evidence |
|---|---|---|---|
| USAID. Bur. for Global Programs, Field Support and Research. Center for Economic Growth and Agricultural Development. Ofc. of Agriculture and Food Security | 1997 to 2001 | Stated in a document | 14 sources |
| Name | Years | Basis | Evidence |
|---|---|---|---|
| Development Support | 1974 to 1995 | Stated in a document | 47 sources |
| Nigeria | 1975 to 1999 | Stated in a document | 16 sources |
| Philippines | 1987 to 1989 | Stated in a document | 5 sources |
| WEST AFRICA REGIONAL | 1999 to 2000 | Stated in a document | 2 sources |
| Congo DR | 1978 to 1980 | Stated in a document | 2 sources |
| Africa Regional | 1991 to 1992 | Stated in a document | 2 sources |
| Benin | 1999 | Stated in a document | 1 source |
| Ecuador | 1989 | Stated in a document | 1 source |
| REDSO/ESA | 2001 | Stated in a document | 1 source |
| Cameroon | 1987 | Stated in a document | 1 source |
| Ghana | 1982 | Stated in a document | 1 source |
Sector profile (computed): Agriculture: crop production, inputs, pests, irrigation 42%; Agriculture: research, extension, training, technology 27%; Health systems, policy and finance (general health) 7%
DEC topic and subject tags. They describe the documents, not what the program was. Each tag opens its evidence in the drawer.
Programs worth reading next, by topic, implementer, country and years. Similar by facets (topic, implementer, country, years) and, when available, description. It says the programs look alike, not how they are related in time. Source: catalog facets
Looking for similar programs.
78 facts shown; 1 unconfirmed link; 0 support mechanisms (not programs); 90 documents cite this program.
Program key prj:936411103
No quote: this fact comes from a metadata field, shown as stored.
No quote: this fact comes from a metadata field, shown as stored.
| 1978 to 1980 |
| Stated in a document |
| 2 sources |
| Georgia | 1979 | Stated in a document | 1 source |
| Rwanda | 1992 | Stated in a document | 1 source |
| Brazil | 1979 | Stated in a document | 1 source |
| Ecuador | 1989 | Stated in a document | 1 source |
| Southern Hemisphere | 1993 | Stated in a document | 1 source |
| Puerto Rico | 1979 | Stated in a document | 1 source |
| Asia | 1986 | Stated in a document | 1 source |
| India | 1987 | Stated in a document | 1 source |
| Thailand | 1987 | Stated in a document | 1 source |
| Ivory Coast | 1982 | Stated in a document | 1 source |
| Tanzania | 1982 | Stated in a document | 1 source |
| Zimbabwe | 1982 | Stated in a document | 1 source |
| Malawi | 1982 | Stated in a document | 1 source |
| Colombia | 1986 | Stated in a document | 1 source |
| Chile | 1986 | Stated in a document | 1 source |