Second-crop cowpea under residual phosphorus doses in the Brazilian Amazon
نویسندگان
چکیده
منابع مشابه
[Evaluation of the residual effect of pyrethroids on Anopheles in the Brazilian Amazon].
OBJECTIVE To evaluate the residual effect of pyrethroids on the mortality rates of Anopheles in order to check their efficacy in indoor residual spraying in the Amazon Region, Brazil. METHODS The study was conducted in public housing units in the city of Belem, Northern Brazil, in 2003. Twelve houses were randomly chosen, three in each of the four established areas. Pyrethroids cypermethrin w...
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While previous empirical analysis of deforestation focused on population, this paper builds from a model of land use which suggests many determinants of deforestation in the Brazilian Amazon. I derive a deforestation equation from this model and test a number of those factors using county-level data for the period 1978]1988. The data include a satellite deforestation measure which allows improv...
متن کاملLand Use Dynamics in the Brazilian Amazon
The articles presented in this special issue of Ecological Economics address the important theme of land use dynamics as it pertains to the Brazilian Amazon. Much environmental change is an ecological artifact of human agency, and such agency is often manifested in land use impacts, particularly in tropical areas. The critical problem of tropical deforestation is but one example of a land use d...
متن کاملSuspected Brazilian Purpuric Fever, Brazilian Amazon Region
To the Editor: Brazilian purpuric fever (BPF), a Haemophilus aegyptius–caused febrile hemorrhagic illness of children that begins with conjunctivitis and has a case-fatality rate of 40%–90% (1,2), was fi rst recognized during a 1984 outbreak. Before June 2007, 69 cases were reported worldwide; 65 were from Brazil (1–3). To our knowledge, the disease had not been reported in the Amazon region un...
متن کاملManaging Phosphorus for Crop Production
Phosphorus is a macronutrient that plays a number of important roles in plants. It is a component of nucleic acids, so it plays a vital role in plant reproduction, of which grain production is an important result. It is also critical in biological energy transfer processes that are vital for life and growth. Adequate phosphorus results in higher grain production, improved crop quality, greater ...
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ژورنال
عنوان ژورنال: Pesquisa Agropecuária Tropical
سال: 2020
ISSN: 1983-4063,1517-6398
DOI: 10.1590/1983-40632020v5066078