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| Ghasemi Mobtaker, Hassan; Taki, Morteza; Salehi, Marzie; Zarei Shahamat, Ebrahim. |
| The nonparametric method of data envelopment analysis (DEA) was used to investigate the energy efficiency and CO2 emission of barley farm in Hamedan province of Iran. The method was used based on eight energy inputs including human labor, machinery, diesel fuel, fertilizers, farmyard manure, biocide, electricity and seed energy and single output of barley yield and technical, pure technical, scale and cross efficiencies were calculated using CCR and BCC models. The results showed that the average values of technical, pure technical and scale efficiency scores of farmers were 0.788, 0.941 and 0.833, respectively. Also, energy saving target ratio for barley production was calculated as 11.45%, indicating that by following the recommendations of this... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data envelopment analysis; Energy saving; Barley; Chemical fertilizers. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2618 |
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| Figueroa-Brito,Rodolfo; Villa-Ayala,Patricia; López-Olguín,Jesús F; Huerta-de la Peña,Arturo; Pacheco-Aguilar,Juan R; Ramos-López,Miguel A. |
| R. Figueroa-Brito, P. Villa-Ayala, J.F. López-Olguín, A. Huerta-de la Pena, J.R. Pacheco-Aguilar, and M.A. Ramos-López. 2013. Nitrogen fertilization sources and insecticidal activity of aqueous seeds extract of Carica papaya against Spodoptera frugiperda in maize. Cien. Inv. Agr. 40(3): 567-577. The damage caused by the fall armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) to vegetative-stage maize cultivated with chemical nitrogen fertilizers, vermicompost, and Carica papaya L. (Caricaceae) seed extract was estimated. Each shoot was infested with one first instar larva of S. frugiperda. The variables measured included the percentage of germination, length of the second and fifth leaves, stem diameter and plant height, and the estimation of... |
| Tipo: Journal article |
Palavras-chave: Aqueous extract; Caricaceae; Chemical fertilizers; Damage; Fall armyworm; Spodoptera frugiperda. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300009 |
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