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Full-Text Articles in Physical Sciences and Mathematics
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
IGC Proceedings (1993-2023)
Africa continues to face a food and agricultural crisis, the effects of which are sometimes exacerbated by drought and civil strife. The food crisis is the result of the inability of African countries in the humid tropical areas and other zones to produce enough food to satisfy escalating demand, owing largely to rapid population growth and pressures of modernisation. Furthermore, the inability of these countries to earn adequate incomes and the lack of food security, especially in some countries suffering from drought, civil strife or war, has resulted in increasing reliance on food aid to fulfil their food import requirements. …
Herbage Characteristics As Affected By The Canopies Of Dominant Trees In A Savanna Of Southern Mozambique, James P. Muir, A. Alage, Inacio C. Maposse
Herbage Characteristics As Affected By The Canopies Of Dominant Trees In A Savanna Of Southern Mozambique, James P. Muir, A. Alage, Inacio C. Maposse
IGC Proceedings (1993-2023)
This study surveyed the species composition, forage yield and forage nitrogen concentration of the herbaceous layer 50, 100 and 200% of the canopy radius from the trunks of many-stemmed false thorn, knob thorn, scented thorn and marula trees in a southern Mozambican savanna. Tree species did not affect herbaceous DM yield or species diversity. Neither direction nor distance from the tree trunk affected DM or specific diversity. Crude protein percentages were 15% higher for legumes and 9% higher for grasses at 50% canopy than at 200% canopy. Grasses under the marulas, the only non-legume tree in the study, had 18% …
Social-Ecological Innovations And Outcomes Of Community-Based Conservation In Africa: Implications For The Future, K. A. Galvin
Social-Ecological Innovations And Outcomes Of Community-Based Conservation In Africa: Implications For The Future, K. A. Galvin
IGC Proceedings (1993-2023)
Community-based conservancies (CBCs) are growing in numbers throughout Africa, particularly in the arid and semi-arid (ASAL) regions where pastoralists raise livestock and live among much of Africa’s remaining wildlife. CBCs emerge around national parks and other protected areas of wildlife spaces apart from people. Community conservancies, in contrast to national parks, are land tenure and land use governance arrangements to conserve wildlife while providing for the livelihoods of African pastoralists. Some conservancies develop by communities in partnership with public agencies, while others are associated with non-government organizations and/or the private sector. Others are more top-down in origin, supported by large …
Taming A 'Wicked' Policy Problem: A Policy Overview Of Property Rights And Governance Of Africa's Rangelands, Esther Mwangi
Taming A 'Wicked' Policy Problem: A Policy Overview Of Property Rights And Governance Of Africa's Rangelands, Esther Mwangi
IGC Proceedings (1993-2023)
No abstract provided.
Prescribed Burning Based On Range Condition In The Okavango Delta Ramsar Site In Botswana, Africa, W. S. W. Trollope, L. A. Trollope, C. De B. Austin, A. C. Held
Prescribed Burning Based On Range Condition In The Okavango Delta Ramsar Site In Botswana, Africa, W. S. W. Trollope, L. A. Trollope, C. De B. Austin, A. C. Held
IGC Proceedings (1993-2023)
No abstract provided.
Adaptation Of Regional Representative Soil Project And Soil Judging For Cameroon, Celestine Che
Adaptation Of Regional Representative Soil Project And Soil Judging For Cameroon, Celestine Che
All Dissertations
Representative regional soils have agricultural, cultural, economic, environmental, and historical importance to Cameroon. Twenty seven regional representative soils have been identified in Cameroon. A set of laboratory exercises, assignments and exam questions have been developed utilizing the Regional Representative Soil Project (RRSP) that gives students an opportunity to practice interpretation of soil series descriptions, taxonomic classes, soil forming factors, and soil physical and chemical properties. The RRSP can be further enhanced and complemented with Soil Judging. Conventional soil judging as practiced in the United States has been adapted for Cameroon by a graduate student from that country using an undergraduate-level …
Microbial Nitrogen Limitation Increases Decomposition, Joseph M. Craine, Carl Morrow, Noah Fierer
Microbial Nitrogen Limitation Increases Decomposition, Joseph M. Craine, Carl Morrow, Noah Fierer
Dartmouth Scholarship
With anthropogenic nutrient inputs to ecosystems increasing globally, there are long-standing, fundamental questions about the role of nutrients in the decomposition of organic matter. We tested the effects of exogenous nitrogen and phosphorus inputs on litter decomposition across a broad suite of litter and soil types. In one experiment, C mineralization was compared across a wide array of plants individually added to a single soil, while in the second, C mineralization from a single substrate was compared across 50 soils. Counter to basic stoichiometric decomposition theory, low N availability can increase litter decomposition as microbes use labile substrates to acquire …