Now showing items 1-20 of 5374

    • A Useful Chart for Teaching the Relation of Soil Reaction to the Availability of Plant Nutrients to Crops 

      Pettinger, N. A. (Virginia Agricultural Experiment Station, 1935-03)
      This publication features a color chart showing nutrient availability at a range of soil pH levels, and includes a table showing suitable pH levels for various crops.
    • The anatomy of market failure 

      Bator, F.M. (The MIT Press, 1958)
      The paretian maximization-of-welfare problem has embedded within it a set of constants, 'duals' or shadow prices, which have all the analytical characteristics of prices, wages, rents, and interest rates. Implied in this ...
    • Records and Distribution Problems of Fishes of the North, Middle, and South Forks of the Holston River, Virginia 

      Ross, Robert D.; Carico, James E. (Virginia Agricultural Experiment Station, 1963-06)
      Since 1953 a survey has been made of fishes of the North, Middle, and South Forks of Holston River, Tennessee River system, Virginia. This paper gives records of fishes obtained, notes on drainage history, and distribution ...
    • Myodegeneration in cattle grazing Cassia species 

      Henson, J.B.; Dollahite, J.W.; Bridges, C.; Rao, R.R. (American Veterinary Medical Association, 1965)
      Widespread skeletal myodegeneration in cattle was associated with a disease syndrome characterized by an afebrile course, abnormally dark red urine, incoordination, recumbency, and death. The plants Cassia occidentalis or ...
    • Cassia occidentalis Toxicosis in Cattle 

      Mercer, H.D.; Neal, F.C.; Himes, J.A.; Edds, G.T. (United States: American Veterinary Medical Association, 1967)
      Results of this experiment indicate that Cassia occidentalis is a toxic plant capable of producing significant losses in cattle. The toxicologic syndrome in the acute form was characterized by sudden onset, recumbency, ...
    • Agricultural Systems and Pastoralism in Tropical Africa 

      Gleave, M.B.; White, H.P. (New Zealand: Hicks Smith, 1972)
      This article explores farming as it relates to effects of the physical environment, the main types of farming practices in tropical Africa, agricultural systems, crops, seasonal rhythms, other activities (such as herding, ...
    • The strength of weak ties 

      Granovetter, M.S. (Chicago, IL: The University of Chicago Press, 1973)
      This paper stresses the importance of the relationship between organizations or groups that have weak ties. While most research is done on models of strong ties, this paper claims that weak ties are often overlooked. This ...
    • The drought in Niger: Part I - The physical and economic consequences 

      Du Bois, V. (Hanover, N.H.: American Universities Field Staff, 1974)
      This field staff report is one of a continuing series on international affairs and major global issues of our time. All reports in the series are prepared by writes who are full-time Associates of the Field Staff, spending ...
    • No-Tillage Research Conference 

      Phillips, R. E. (ed.) (Lexington, Kentucky: University of Kentucky, College of Agriculture, Agricultural Experiment Station, 1974)
    • The Enterprising Peasant: Economic Development in Gombe Emirate, North Eastern State, Nigeria, 1900-1968 

      Tiffen, M. (London, UK: HMSO, 1976)
      The book examines the level of economic growth in Gombe Emirate, north eastern Nigeria over the two generations from the beginning of the century; the time from the first decade to the 1960s saw a fourfold population ...
    • Annex H: Niger range and livestock project social soundness analysis 

      Aronson, D.R. (1976)
      The Niger Range and Livestock Project has the twin aims of increasing the incomes of pastoralists in central Niger, and finding a long-term ecological balance in the zone. Sheep epidemic and the risk of cattle or camel ...
    • Postemergence growth of the ovarian follicles of Aedes aegypti 

      Hagedorn, H. H.; Turner, S.; Hagedorn, E. A.; Pontecorvo, D.; Greenbaum, P.; Pfeiffer, D.; Wheelock, G.; Flanagan, T. R. (1977)
    • Environmental quality and issues of adoption research 

      Pampel, F.; van Es, J. (Columbia, MO: The Rural Sociological Society, 1977)
      The authors find that existing knowledge of adoption behavior is most applicable to commercial agricultural practices, and that adoption of environmental practices does not relate to adoption of commercial practices. ...
    • High bridewealth, migrant labour and the position of women in Lesotho 

      Murray, C. (Cambridge University Press on behalf of the School of Oriental and African Studies, 1977)
      This essay discusses the high bride wealth in Lesotho, as well as discussing the role of women and migrant labor. It strives to explain the high bridewealth that is persistent in Lesotho and the article discusses the ...
    • The role of seasonality in a West African pastoral economy 

      Swift, J. (Sussex, UK: Institute of Development Studies, University of Sussex, 1978)
      The paper focuses on the nomadic pastoralist Kel Adrar Twareg of north Mali, who divide their year into three approximately equal seasons: a hot rainy season, a cold dry season, and a hot dry season. The rainfall, which ...
    • Cattle, rainfall, and tsetse in Africa 

      Bourn, D. (Elsevier B.V., 1978)
      Increased population pressure has led to attempts to reclaim some to the ten million square miles of Africa in which tsetse fly occur. The paper traces the occurrence of tsetse fly, and its impact on cattle. In tsetse free ...
    • Drought and dependence in the Sahel 

      Ball, N. (1978)
      The relationship between human activity and environmental degradation has been documented in numerous studies. With regard to West Africa, E.P. Stebbing was already warning of ecological degradation due to overcultivation ...
    • The Economics of Pastoralism: A Case Study of Sub-Saharan Africa 

      Konczacki, Z. A. (ed.) (UK: Frank Cass and Company, Ltd., 1978)
      Livestock is regarded as a capital good on the basis of its ability to reproduce itself and thus create an income for its owner, this being in the form of animals and consumption goods. The system of herding practiced ...