Consulta: subjectFacets:"Low-input agriculture"
Registros recuperados: 3
Data/hora: 11/06/2024 10:06:24

Tradeoffs Between Water Quality and the Economic Impacts of Low-Input Agriculture in the Coastal Plain of Virginia
Provedor de dados: 31
Autores: Diebel,   Penelope L.; Taylor,   Daniel B.; Batie,   Sandra S.; Heatwole,   Conrad D.
Agricultural activities have been identified as major contributors to the non-point pollution of the Chesapeake Bay. Low-input agricultural practices are being considered to reduce pollution in areas adjoining the Chesapeake Bay. A multiperiod mathematical programming model was used to examine the potential adoption of low-input practices and to assess the environmental consequences of these activities under different policies. The results of these analyses indicate that tradeoffs exist among the types of non-point pollution produced under each policy. Only policies that retired productive agricultural land reduced all pollutant types.
Tipo: Working or Discussion Paper
Palavras-chave: Environmental tradeoffs; Low-input agriculture; Nitrogen; Pesticides; Farm Management; Resource /Energy Economics and Policy.
Ano: 1992
URL: http://purl.umn.edu/118176

Phosphorus Fertilization Increases Biomass and Nutrient Accumulation Under Improved Fallow Management in a Slash-and-Mulch System in Eastern Amazonia, Brazil
Provedor de dados: 90
Autores: Rangel-Vasconcelos,Lívia Gabrig Turbay; Kato,Osvaldo Ryohei; Vasconcelos,Steel Silva; Oliveira,Francisco de Assis.
ABSTRACT Improvement of fallow vegetation can have a positive impact on the productivity of slash-and-mulch systems in eastern Amazonia. Phosphorus fertilization can increase biomass and nutrient stocks in the fallow phase, thereby improving nutrient cycling and crop productivity. Here, we compared biomass and nutrient stocks under three fallow management strategies: (1) natural fallow (regrowth vegetation) - NF; (2) NF vegetation improved with leguminous trees (Sclerolobium paniculatum Vogel and Inga edulis Mart.) - IF; and (3) NF vegetation improved with leguminous trees plus phosphorus fertilization - IF+P. We quantified above- and belowground biomass and N, P, K, Ca, and Mg stocks after 23 months of fallow. The IF+P increased aboveground (leaf + branch...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aboveground biomass; Fine roots; Inga edulis; Low-input agriculture; Sclerolobium paniculatum.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100537

Organic matter decomposition and microarthropod community structure in corn fields under low input and intensive management in Guaíra (SP)
Provedor de dados: 63
Autores: Rodrigues,G.S; Ligo,M.A.V; Mineiro,J.L. de C.
The rate of organic matter decomposition and the structure of the communities of microarthropods were compared between two corn fields receiving contrasting agricultural management practices (low input and intensive farming). The rate of decomposition tended to be higher in the intensively managed field in the beginning of the growing season, but decreased to a level significantly lower than the observed in the low input field by the end of the growing season. This suggested that the biological community associated with the decomposition process could be negatively influenced in the intensively managed field. Analyses of the structure of microarthropod communities indicated differences between the two areas. The microarthropod populations present in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil fauna; Organic matter; Decomposition; Agroecosystems; Farming systems; Low-input agriculture.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000100010