Search results for "SOI"
showing 10 items of 4823 documents
Carbon sequestration in French agricultural soils: A spatial economic evaluation
2021
International audience; Soil organic carbon sequestration measures entail costs to farmers with different individual characteristics and located in different areas. A cost‐effective analysis taking into account these heterogeneities is crucial for developing effective public policy aimed at increasing carbon sequestration. We undertake such an analysis focusing on three soil organic carbon sequestration measures: no‐till, extension of temporary grasslands, and hedgerows. Through an optimization model applied to France, our results show that only extension of temporary grasslands can store carbon at low cost, though their potential for carbon sequestration is also low. For an ambitious carbo…
Do commodity assets hedge uncertainties? What we learn from the recent turbulence period?
2022
AbstractThis study analyses the impact of different uncertainties on commodity markets to assess commodity markets' hedging or safe-haven properties. Using time-varying dynamic conditional correlation and wavelet-based Quantile-on-Quantile regression models, our findings show that, both before and during the COVID-19 crisis, soybeans and clean energy stocks offer strong safe-haven opportunities against cryptocurrency price uncertainty and geopolitical risks (GPR). Soybean markets weakly hedge cryptocurrency policy uncertainty, US economic policy uncertainty, and crude oil volatility. In addition, GSCI commodity and crude oil also offer a weak safe-haven property against cryptocurrency uncer…
Does plant growth phase determine the response of plants and soil organisms to defoliation?
2005
Abstract To test a hypothesis that the effects of defoliation on plant ecophysiology and soil organisms depend on the timing of defoliation within a growing season, we established a greenhouse experiment using replicated grassland microcosms. Each microcosms was composed of three plant species, Trifolium repens , Plantago lanceolata and Phleum pratense , growing in grassland soil with a diverse soil community. The experiment consisted of two treatment factors—defoliation and plant growth phase (PGP)—in a fully factorial design. Defoliation had two categories, i.e. no trimming or trimming a total of four times at 2 week intervals. The PGP treatment had four categories, i.e. 1, 3, 7 or 13 wee…
Vineyard irrigation and assessment of ecosystem service: Experimental trials on “Catarratto” cultivar for the production of “Bianco di Alcamo” DOC wi…
2022
Water is an important resource for humans both for drinking and for irrigation. In the case of irrigation, the use of water resources leads to many direct benefits for farmers. The use of irrigation water, in addition to having consequences for those directly involved, determines positive externalities on the ecosystem in general. In this research the value of the ecosystem service that determines water for irrigation was estimated. The method used was that of the gross margin method which determined a value of 200.10 (sic)/ha. The research results are very important in relation to climate change which makes water increasingly important as an element of production in Mediterranean environme…
Tekijänoikeuslaki eduskunnan käsittelyssä : digitaalisten oikeuksien hallinnan teknologiat päätöksenteon kohteena
2007
Tässä tutkielmassa tarkastellaan digitaalisten oikeuksien hallinnan teknologioita eduskunnan päätöksenteon kohteena. Tutkimusongelmina selvitän ensiksi kuluttajan ja tuottajan intressejä digitaalisten oikeuksien hallinnan teknologioilla (engl. digital rights management, DRM) suojattuun aineistoon. Toisena tutkimusongelmana selvitän miten ja mitkä kuluttajien ja tuottajien intressit politisoituvat kansanedustajien argumentaatiossa, sekä kolmanneksi tarkastelen miten kansanedustajat politikoivat, toimivat poliittisesti säätäessään tekijänoikeuslain. Ensimmäisen tutkimuskysymyksen aineistona ovat tieteelliset artikkelit, toisen ja kolmannen tutkimuskysymyksen aineistona ovat tekijänoikeuslakik…
De la contradiction non manifeste résultant de la présence dans un même contrat d'une clause compromissoire et d'une clause attributive de compétence…
2004
International audience; (Cass. 2e civ., 18 déc. 2003, SCI La Chartreuse et autres c/ Th. Cavagna et autres, D. 2004, IR p. 321)
Clause compromissoire. Référé provision. Obligation non sérieusement contestable. Urgence. Absence de constat. Absence de base légale. Cassation
2001
International audience; (Cass. 1re civ., 29 juin 1999, Firma Waibel c/ A. Kaeuffer, D. 1999.649, note I. Najjar)
Acute toxicity tests using earthworms to estimate ecological quality of compost and digestate
2017
Ecological quality of compost and digestate, used as fertilizers for agricultural use, was assessed through an acute ecotoxicological bioassay testing the earthworm Eisenia fetida (Annelida). The test evaluates the earthworm’s attitude to dig within 15 min into a soil medium constituted by a mixture of a standardized soil and different concentrations of compost/digestate. According to different classes of behavior responses, the sample is classified as good or bad quality (ON/OFF). The validity of this test was confirmed comparing the observations with the results from a standard chronic test developed by OECD (Organisation for Economic Co-operation and Development). Considering samples fro…
Capacity of various organic residues to support adequate earthworm biomass for vermicomposting
1986
We tested the potential of different kinds and combinations of wastes to support the biomass ofEisenia fetida (Sav.) capable of processing a given amount of waste in a period of ca. 1 month. Mixed miscellaneous wastes and activated sewage sludge mixed with or embedded in sieved pine bark showed capacity to maintain the required biomass for a long period. Wastes were converted into odourless castings of good physical structure, provided that a sufficient population was present from the beginning and fresh waste was added regularly. A horizontally working “worm bed compost” was designed instead of the “load-on-top” principle.
Toxicity of copper and zinc assessed with three different earthworm tests
2005
Abstract At present, standardised earthworm acute toxicity and reproduction tests are used to assess the toxicity of heavy metal contaminated soils. These tests are, however, time-consuming, laborious and costly, and in addition, some sublethal responses may remain overlooked. Avoidance of metal contaminated soils by earthworms may be a useful parameter when assessing ecological risks with a low test effort. The objective of the present study was to find out whether the earthworm Aporrectodea tuberculata avoids soils simultaneously contaminated with Cu and Zn, and whether earlier exposure to metal-polluted soil affects its avoidance response. The aim was also to compare the sensitivity of t…