Search results for "EROD"

Effect of plot size on measured soil loss for two Italian experimental sites

2011

The objective of this investigation was to determine empirically the plot width and length effects on runoff volume, Ve, soil loss, Ae, and sediment concentration, Ce, by using data collected, at the temporal scale of the erosive event, on bare plots differing in width (2 to 8 m) and length (11 to 22 m) for two Italian stations (Masse, Umbria; Sparacia, Sicily). Mean results differed by a maximum factor of 1.6 for Ve, 1.8 for Ae and 1.2 for Ce when plots differing in width were compared and by a maximum factor of 1.4 for Ve, 1.2 for Ae and 1.3 for Ce when comparison between plot lengths was conducted. Differences between two plot widths or two plot lengths were not statistically significant…

Estimating the USLE soil erodibility factor in Sicily, South Italy

2012

The Universal Soil Loss Equation (USLE) is used by professionals and technicians to predict soil loss by water erosion and to establish soil conservation measures. One of the key elements of the USLE is the K factor, which is a measure of the soil erodibility. Given the difficulty in collecting sufficient data to adequately measure K, early in the USLE's history the soil erodibility nomograph method was developed to allow estimation of K based on standard soil properties. Since the nomograph approach was developed based on a small number of soils in the United States, it is necessary for other contexts to check the nomograph's ability to predict the soil's true erodibility. Considering that…

Modeling Rill Erosion at the Sparacia Experimental Area

2015

In this paper the contributions of rill and interrill components to total soil erosion monitored at event scale at the Sparacia experimental area, Southern Italy, were firstly compared and the dominance of the rill component was detected. Then, the reliability of two empirical relationships between the rill length and its eroded volume and among the morphological variables (length, width, depth and volume) describing the channelized process was tested using both direct measurements of rills, carried out for the October 3, 2011 event, and those of ephemeral gullies surveyed on February 2010 at Sparacia. The measurements of rills detected by the direct field relief were compared with those ob…

Extremely potent antifeedant neo-clerodane derivatives of scutecyprol A

2004

Two known neo-clerodane diterpenoids, scutecyprol A (1) and scutalbin C (2), have been isolated from the acetone extract of the aerial parts of Scutellaria sieberi. The antifeedant activity of scutecyprol A (1), of its 15-oxo derivative (3), and of several halohydrins (4-9), synthesized starting from compounds 1 and 3, against Spodoptera littoralis have been determined and structure-antifeedant relationships are discussed.

La méthodologie de l'Economie Théorique et Appliquée aujourd'hui, ouvrage édité sous la direction de J. WOLFF avec P. SALMON, B. WALLISER, A. WOLFELS…

1990

International audience

La monnaie et le crédit dans le développement pré-industriel: le cas de Marseille

2019

International audience

Le mouvement des idées monétaires dans l'Europe moderne

2014

Ce chapitre vise à fournir une vue de l'évolution des idées monétaires dans l'Europe moderne. Il s'alimente notamment des textes des auteurs du présent livre pour en dégager quelques leçons. Dans un premier temps, il discutera du sens du substantif " mercantilisme " tel qu'il a été construit depuis le milieu du dix-huitième siècle : examiner les fondements historiques de cette notion permettra d'en montrer les impasses. Il présentera, dans un second temps, une catégorisation des auteurs construite à partir de leur rapport au pouvoir.

Introduction. Les pensées monétaires dans l'Europe moderne : contexte et intentions

2014

Ce texte introduit le livre et présente ses objectifs et sa structure. Ce livre traite du déploiement des idées monétaires dans le monde européen de l'époque moderne, depuis les écrits de Nicolas Copernic (1517) jusqu'à la veille de la publication de l'ouvrage économique majeur écrit par Adam Smith (1776) . Il met l'accent sur le contexte historique dans le cadre duquel ces idées monétaires ont vu le jour. Il montre la grande variété des contextes et des idées bien au-delà des espaces, des auteurs et des thèmes généralement étudiés, en intégrant des territoires peu étudiés par les économistes, en mettant au jour des approches et des auteurs oubliés, en tentant, enfin, de restituer la riches…

Dissertatio de Tyranno, aut rege Herode, qui Iacobum occidit

1701

Proemium ad dissertationem de Tyranno, qui Iacobum occidit Caplletra ornada, fris Sign.: [ ]1, B-F2, G4 Text a dues col. i, el Proemium, que precedeix a la dissertatio, a línia tirada Reclams

Dissertatio de Tyranno, aut rege Herode, qui Iacobum occidit.

Proemium ad dissertationem de Tyranno, qui Iacobum occidit Caplletra ornada, fris Sign.: [ ]1, B-F2, G4 Text a dues col. i, el Proemium, que precedeix a la dissertatio, a línia tirada Reclams