Search results for "Semi"
showing 10 items of 3894 documents
Determination of Evapotranspiration and Crop Coefficient of Cactus Pear (Opuntia ficus-indica Mill.) with an Energy Balance Technique
2013
A micrometeorological approach based on surface renewal technique was adopted to estimate evapotranspiration fluxes and crop coefficient data from an irrigated cactus pear (Opuntia ficus-indica Mill.) orchard under Mediterranean climatic conditions. High-frequency temperature readings were taken above the canopy top in order to get surface renewal sensible heat flux values (HSR). These values were compared against eddy covariance sensible heat fluxes (HEC) for calibration. Latent heat flux (or evapotranspiration, ET) was obtained as the residual of the energy balance equation using HSR. In field measurements of biophysical crop features, physiological characteristic and soil hydraulic compo…
No-till durum wheat yield success probability in semi arid climate: A methodological framework
2018
Abstract The aim of this study is to develop a framework for the evaluation of no-till (NT) yield success probability as a decision tool for farmers or decision makers. The effect of soil management on durum wheat yield has been tested on many long-term field experiments. Results of these researches were collected in a unique dataset to evaluate the success of NT management in comparison to conventional tillage (CT) as influenced by the aridity index, crop residue management and cropping system. A total of 519 observations of long-term experiments (>3years) regarding durum wheat in a number of areas with semi arid climate were included in the present study. The relative ratio of yield under…
Direct seeding mulch-based cropping increases both the activity and the abundance of denitrifier communities in a tropical soil
2009
International audience; This study evaluated the impact of direct seeding mulch-based cropping (DMC), as an alternative to conventional tilling (CT), on a functional community involved in N cycling and emission of greenhouse gas nitrous oxide (N2O). The study was carried out for annual soybean/rice crop rotation in the Highlands of Madagascar. The differences between the two soil management strategies (direct seeding with mulched crop residues versus tillage without incorporation of crop residues) were studied along a fertilization gradient (no fertilizer, organic fertilizer, organic plus mineral fertilizers). The activity and size of the denitrifier community were determined by denitrifica…
Applied Chemical Ecology to Enhance Insect Parasitoid Efficacy in the Biological Control of Crop Pests
2018
The field application of semiochemicals, used by parasitoids to find mates and to locate their hosts, is a promising environmentally sustainable and highly specific pest control strategy and an attractive alternative to the use of pesticides. In this chapter, we first examine research progress dealing with the effect of semiochemical cues on parasitoid foraging strategy. In the second part, we review the possible field applications of these chemical cues to enhance pest control strategies, either through direct pest control or by manipulating parasitoid behaviour. We then consider novel approaches, such as the “attract and reward” strategy, combining semiochemical application and habitat ma…
High prevalence of oral potentially malignant disorders and risk factors in a semi-urban brazilian city: a population-based cross-sectional study
2021
Background Oral Potentially Malignant Disorders (OPMDs) are defined as lesions with a greater likelihood of progressing to cancer. Population-based studies that evaluate the prevalence of OPMDs are scarce in Brazil. The aim of the present study was to determine the prevalence of OPMDs and associated risk factors in a semi-urban Brazilian population. Material and Methods This is a cross-sectional study, whose universe included individuals aged 40 years or older residing in a medium-sized city of northeastern Brazil. Data collection was divided into two steps: interview and oral examination. The outcome variable was the presence of OPMDs. The predictor variables were sociodemographic characte…
The love boat. La crociera come eterotopia
2023
On a cruise, spatial coordinates are suspended (orientation with respect to the land and to the labyrinthine plan of the ship is lost), the temporal dimension (time is marked by the palimpsest of daily activities rather than by clocks), and the actor's characteristics (with the alteration of some of the identity traits of the subjects involved). The passenger experiences on the voyage an 'other' self, one that in some ways cannot be revealed within everyday life. And the boat becomes the place in which a series of paradoxes are realised: the realm of the freedom, but also a form of holiday slavery in which everything is capillarily foreseen beforehand; a space in which apparent luxury is ma…
Theoretical study of Zn and Cd interstitials and substitutional interstitials in CuInSe2 via hybrid functional calculations
2013
We have investigated the formation of Zn and Cd interstitials in the CuInSe2 solar cell material via density-functional-theory (DFT) calculations by employing the HSE06 hybrid functional. The computed formation energies for Zn interstitials were in the range of 2.09-2.68 e V, and in the range of 2.04-2.25 eV for substitutional interstitials. In constrast, the formation energies of Cd interstitials and substitutional interstitials were between 1.85-2.75 eV and 2.41-2.64 eV, respectively. Thus, these results indicate, that Cd interstitials are more likely to be formed than Zn interstitials, and that in case of Zn inclusion into CuInSe2 Zn atoms will prefer to adopt substitutional interstitial…
Cuccioli : Critica dei cartoni animati
2020
Con il termine generico di cuccioli, ci si riferisce ai piccoli di ogni specie animale, inclusa, quella umana. Succede, così, che questa grande classe semantica, se opportunamente esplorata, possa portare a inaspettate convergenze: le pubblicità dei mangimi animali somigliano, solo per fare un esempio, a quelle rivolte al mondo della prima infanzia, nonostante esse possano essere ricondotte a settori merceologici e commerciali davvero distanti. Esplorare i contorni di una tale affinità può essere l’occasione per riflettere su un fenomeno più ampio di ri-articolazione del rapporto fra uomo e animali in corso in questi anni. I cuccioli, umani o non umani, vivono con noi, sono nostri compagni …
Cuccioli, pets e altre carinerie: un’introduzione
2018
“Nel cuore umano c’è posto solo per una data quantità d’amore e d’affetto: quando ci si piazza un pupo, il cane deve andarsene”. Questa frase, pronunciata dal cane vagabondo Biagio, protagonista insieme alla cagnolina Lilli di un vecchio film1 (siamo nel 1955) della Disney, vuole essere un ammonimento. Egli, memore di chissà quale delusione, si rivolge al suo uditorio di cani di quartiere, invitandoli a non farsi troppe illusioni sull’affidabilità degli umani: meglio non concedere il privilegio della fedeltà, virtù cardinale canina, a dei soggetti che finirebbero per non meritarsela. Meglio, insomma, restare randagi e liberi. Ma la sua esortazione non può che suonare, agli spettatori…
Minestre siciliane e un osservato speciale: la minestra di tenerumi
2020
Questo capitolo prende in esame una famiglia di pietanze che ha ampia diffusione in Italia e in Sicilia, quella delle minestre. Il termine minestra, di difficilissima traduzione, raccoglie piatti talvolta molto diversi tra loro fino ad accomunare, nei ricettari meno recenti, tutti i primi piatti italiani. Nel capitolo sarà approfondito il problema della vaghezza semantica del termine e prenderemo in esame una delle minestre siciliane più note: la "minestra di tenerumi", caratterizzata dalla presenza di un ingrediente autoctona, la cucuzza lunga con le sue foglie. La presenza di quest'ingrediente contribuisce a stabilizzare l'identità del piatto, da un lato, e a sancirne la tipicità e, dunqu…