Search results for "irrigation"
showing 10 items of 342 documents
The effect of different vigour olive clones on growth, dry matter partitioning and gas exchange under water deficit
2012
Abstract In the last decade, high-density olive planting systems have been developed to facilitate less costly mechanical harvesting and pruning by using straddle harvesters. High-density orchards allow faster production since the first crop of fruit starts a few years after planting. In high-density orchards the control of tree size is essential. It is possible to control the vigour and size of the tree by selecting suitable cultivars, by choosing rootstocks capable of controlling scion vigour and, finally, by applying deficit irrigation to reduce plant vegetative growth. Knowledge of tree water requirements is needed for precise irrigation scheduling. In this study, the dwarfing capacity …
Research focusing on plant performance in constructed wetlands and agronomic application of treated wastewater – A set of experimental studies in Sic…
2019
Constructed wetlands are sustainable technologies for the treatment of wastewater. These biological systems have been widely studied throughout the world for more than 30 years; however, most studies have focused on the effects of design and engineering on pollutant removal from wastewater. Undoubtedly, agro-technical aspects have been given too little consideration by research. This paper reports the main results of a set of experiments carried out on two pilot horizontal subsurface flow systems in Sicily (Italy). Festuca, Lolium and Pennisetum spp. in combination and three emergent macrophytes-Arundo donax L., Cyperus alternifolius L. and Typha latifolia L.-alone, were assessed. The aim o…
La crisis del modelo tradicional de regadíos del interior valenciano. El caso de Cortes de Pallás: paisajes del agua y patrimonio cultural
2020
Los sistemas tradicionales de regadío forman un legado que se manifiesta mediante lo que conocemos como paisaje y patrimonio del agua. En las áreas del interior valenciano se experimentan disfunciones socioeconómicas que se evidencian paisajísticamente. A partir del análisis en profundidad de un caso de estudio como es la huerta de Cortes de Pallás, en el sector septentrional del macizo del Caroig, se valora si los procesos en ella identificados explican las dinámicas de crisis de los regadíos históricos del interior. El abandono de una parte destacada de las parcelas ha sido una práctica común, aun manteniéndose su morfología y una red de acequias que sigue en funcionamiento. Els sistemes …
La ciudad y la huerta.
2005
The disappearance of the agrarian landscape ln the huerta of Valencia has been accelerated in the last years as a consequence of the advance on the disordered urbanization. This has given place to both a civic movement and a growing attention from investigators of diverse areas. The present article is a review of the recent publications about this topic. The text stands out the peculiar features of this agrarian space as well as the process of its historical formation. The arguments for the preservation of the huerta are mainly based in their ecological and cultural values. Also in the rich material patrimony that the irrigation and agricultural practices have left on the land. One of the m…
Effect of three different irrigation solutions applied by passive ultrasonic irrigation
2015
Objectives This study evaluated the maximum depth and percentage of irrigant penetration into dentinal tubules by passive ultrasonic irrigation (PUI). Materials and Methods Thirty extracted human teeth were instrumented and divided into three groups. According to final irrigation regimen, 5.25% sodium hypochlorite (Group A, NaOCl), 2% chlorhexidine (Group B, CHX) and saline solution (Group C, control group) were applied with Irrisafe 20 tips (Acteon) and PUI. Irrigant was mixed with 0.1% rhodamine B. Sections at 2 mm, 5 mm, and 8 mm from the apex were examined with confocal laser scanning microscopy (CLSM). The percentage and maximum depth of irrigant penetration were measured. Kruskal-Wall…
Effectiveness of passive ultrasonic irrigation in improving elimination of smear layer and opening dentinal tubules
2014
Objective: To compare the ability to eliminate debris and open dentinal tubules of different ultrasound irrigation procedures. Study Design: Forty extracted single-rooted human teeth were instrumented with mechanical rotatory instrumentation, and divided into four groups: (n=10) according to the final irrigation technique: group A (control), 2.5% NaOCl irrigation with the Miraject needle and no ultrasonic agitation; group B, passive ultrasonic irrigation (PUI) with 2.5% NaOCl and Irrisafe 20 tips; group C, PUI with 2.5% NaOCl and Irrisafe 25 tips; group D, PUI with 2.5% NaOCl and K 25 tips. The amount of debris and the number of opened dentinal tubules was established by scanning electronic…
Agrarian development and state building in Spain: the contest for irrigation in the Valencian Region, 1770–1860
2022
AbstractA determined expansion in the productive capacity of Spanish agriculture was a fundamental and contentious objective during the crisis of the country’s ancien régime and the formation of the liberal state, in the years of transition from the eighteenth to the nineteenth centuries. In this study we examine a fundamental reorientation that occurred in an ambitious project for the expansion of irrigation in the region of Valencia. In this region, characterised by a well-rooted commercial agriculture, the original scheme, initiated by an enlightened aristocrat well connected with the royal court, would be profoundly altered in the transition from one political regime to another. The irr…
Detección de estrés hídrico en olivar mediante datos hiperespectrales y térmicos del sensor AHS
2005
En: XI Congreso Nacional de Teledetección, Teledetección, Avances en la Observación de la Tierra, M. Arbelo, A. González, J.C. Pérez (Eds.), pág.: 53-56, Tenerife, 21-23/9/2005.
Cover crops and pruning in Bobal and Tempranillo vineyards have little influence on grapevine nutrition
2016
ABSTRACT Cover crops may improve vineyard soil properties, grapevine nutrient status and berry composition, however, factors such as cover crop type, annual rainfall, climate and irrigation may change their effects on vineyards. From 2008 to 2011, the effects of a non-permanent cover crop and two pruning techniques on soil as well as vine nutrients and grapevine performance of two vineyards (cv. Tempranillo and cv. Bobal) were evaluated. For that purpose, two legumes were sown in inter-rows of hand-pruned vines in February and were tilled at flowering. Soil tillage, or cover cropping, was combined with either light pruning or severe pruning to study foliar nutrient variations. Soil N, P, K …