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Cattle Manure Bioconversion Effect on the Availability of Nitrogen, Phosphorus, and Potassium in Soil Rev. Bras. Ciênc. Solo
Eckhardt,Daniel Pazzini; Redin,Marciel; Santana,Natielo Almeida; Conti,Lessandro De; Dominguez,Jorge; Jacques,Rodrigo Josemar Seminoti; Antoniolli,Zaida Inês.
ABSTRACT The efficiency index (EI) refers to the ratio of nutrients mineralized/made available in the soil to the total amount of nutrients added by organic fertilizer. Therefore, understanding the EI is essential for recommendation of organic fertilization. The aim of this study was to evaluate the availability through mineralization and the efficiency index of nitrogen (N), phosphorus (P), and potassium (K) in organic fertilizers produced from cattle manure. The following treatments were evaluated in an incubation experiment under controlled conditions: soil without fertilizer (control); soil + beef cattle manure vermicompost; soil + beef cattle manure/straw compost; soil + beef cattle manure; soil + dairy cattle manure; and soil + vermicompost produced...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Organic fertilizers; Vermicompost; Efficiency index.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100527
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Super Efficiency Evaluations Based on Potential Slack AgEcon
Bogetoft, Peter; Hougaard, Jens Leth.
Super efficiency evaluations are introduced along the lines of the potential improvements approach in Bogetoft and Hougaard (1999). Both a reference selection and a related super efficiency index is defined. The new (potential slack) super efficiency index is compared to a Farrell-based super efficiency index (as in Andersen and Petersen 1993) with respect to convex envelopment technologies.
Tipo: Working or Discussion Paper Palavras-chave: Super efficiency; Potential slack; Reference selection; Efficiency index; DEA; Research Methods/ Statistical Methods.
Ano: 2000 URL: http://purl.umn.edu/24194
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