Search results for " SOIL"

Interazione tra processi geomorfologici che coinvolgono il suolo e condizioni di rischio geoambientale

2010

Lo studio dei fenomeni di instabilità superficiale risulta di particolare interesse in quanto molto spesso tale tipologia di dissesto produce gravi danni alle strutture antropiche e, talvolta, anche perdite di vite umane. Nonostante la modesta massa di terreno mobilizzata, queste frane possiedono una elevata pericolosità dovuta principalmente alla loro forza d’urto; i danni più frequenti riguardano le strade ed i relativi muri in calcestruzzo o in pietra che subiscono forti spinte laterali che ne provocano il ribaltamento. In alcuni casi possono causare anche gravi lesioni agli edifici, sfondando i muri posti sulla traiettoria della massa in movimento, provocando anche delle vittime; esempi…

When the growth of the town produces gardens

2019

The metropolis is a mother of gardens (Migge, 1919): in the beginning of the twenty 113 century, Leberecht Migge understood that the housing reform of the Modern Movement was also the reform of the urban orchards that could expand in wide common spaces between the buildings. The parks, in which the towns finally could stay in, included a humanized nature, organized in productive and leisure areas. Migge’s envisagement of “Stadtland” had many affinities with the “Extending town” by Giuseppe Samonà based on the shape as single matrix of built and cultivated spaces (Samonà, 1976). Both architects, forty years from each other and in different places of work - Germany and Italy - considered ur…

APPLICAZIONE DI UN PROTOTIPO DI MOTOVANGATRICE PER PRESERVARE LA FERTILITÀ DEL SUOLO

Negli ambienti caratterizzati da forti pendenze o sistemati a terrazze, nell’ambito delle lavorazioni superficiali, viene impiegato diffusamente il motocoltivatore provvisto di zappatrice rotativa. Tuttavia, l’effetto dell’uso ripetuto della zappatrice per lavorazione del terreno ha una notevole influenza sulle caratteristiche del terreno, che si presenta finemente polverizzato, soffice e astrutturato. Al fine di limitare tali inconvenienti, è stata progettata dalla sezione Meccanica del Dipartimento Scienze Agrarie e Forestali dell’Università di Palermo, in collaborazione con la ditta costruttrice Agrotec di Padova, una macchina innovativa semovente provvista di organi di lavoro del tipo a…

Have tractor manufacturers bore in mind soil compaction over the last 40 years?

2019

Soil compaction is the compression of soil particles in a lower volume as a consequence of the reduction of the spaces existing among the particles themselves. This phenomenon is caused by natural forces and, above all, human ones. In order to estimate the field damages that can be caused by the traffic of agricultural machines, the load and the mean pressure applied by the tyres onto the soil can be measured. The research aim is to determine the pressure applied by each considered tractor onto the soil, in order to evaluate the effect of the traffic of tractors onto the soil itself. A total of 783 wheeled tractors manufactured and marketed in the last 35 years (1979-2014) was investigated.…

Partitioning ET measurements for sparse vegetation: application to an olive orchard.

2011

An inhabited bridge between city and countryside

2015

With its propagation beyond the ancient walls in the countryside, the contemporary urban pattern of Piacenza flakes off, is frayed, making feeble the limit between rus and urbs; the continuous and porous old town gives way to the sprawl. In this project, the main idea is that, through moderate and small signs, defined by thematic pavilions (which are the general goal to achieve according to the Summer School), the effects can affect the urban scale, in a much wider field than the real area of intervention. So in this case the pavilion itself is thought as a bridge on the threshold between city and countryside. Moreover, the soil design, starting from the edges of the city, allows to fix the…

MANAGING SUBTERRANEAN CLOVER, ANNUAL MEDIC AND VETCH FOR SICILIAN VINEYARD SUSTAINABILITY

2004

During 2005/2006 a vineyards, located in south-west of Sicily (37° 60’ N – 12° 30 E), were subjected to five different soil managements: “conventional” ( T ) soil management using up to eight soil plowing with a five furrow plow; natural cover cropping ( N ), vetch cover cropping ( V ) (Vicia sativa L.); subclover cover cropping ( S ) (trifolium subterraneum var. Clare); medic cover cropping ( M ) (medicago polymorpha var. Santiago). In the layer 0-25 cm, soil moisture, total N, NO3, NH4, and soil organic matter were determined. Fresh and dry biomass weight, and total nitrogen percentage were determined on nine one square meter subplots for each thesis. Soil erosion was measured, using a Ge…

Interactive Effects of Genotype and Molybdenum Supply on Yield and Overall Fruit Quality of Tomato

2019

Molybdenum (Mo) is an essential trace element for plant growth, development, and production. However, there is little known about the function and effects of molybdenum in tomato plants. The present study assessed the influences of different Mo concentrations on four tomato F1 hybrids (“Bybal” F1, “Tyty” F1, “Paride” F1, and “Ornela” F1) grown using a soilless system with different Mo levels [0.0, 0.5 (standard NS), 2.0, and 4.0 μmol L−1, respectively]. The crop yield, plant vigor, fruit skin color, TA, fruit water content as well as the accumulation of SSC, and some antioxidant compounds such as lycopene, polyphenols and ascorbic acid were evaluated. The minerals concentration, including n…

Monitoring Water and Energy Cycles at Climate Scale in the Third Pole Environment (CLIMATE-TPE)

2021

A better understanding of the water and energy cycles at climate scale in the Third Pole Environment is essential for assessing and understanding the causes of changes in the cryosphere and hydrosphere in relation to changes of plateau atmosphere in the Asian monsoon system and for predicting the possible changes in water resources in South and East Asia. This paper reports the following results: (1) A platform of in situ observation stations is briefly described for quantifying the interactions in hydrosphere-pedosphere-atmosphere-cryosphere-biosphere over the Tibetan Plateau. (2) A multiyear in situ L-Band microwave radiometry of land surface processes is used to develop a new microwave r…

The use of mineral materials for salinity control in roadside soils

2023

This paper presents the results of a fi eld study on using mineral materials (fi ne-grained sand and medium- -grained gravel) to reduce the concentration of readily soluble salts in a roadside environment. The investigated soils were Rendzic Sceletic Leptosols from an urban area characterized by a shallow humus horizon with a high content of skeletal parts, as well as a lack of homogeneity of the material in the soil profi le. All soil samples were taken from fi ve plots located along the main streets in the city of Opole (Southern Poland). It was revealed that the use of fi ne-grained sand and medium-grained gravel improved the structure of the surface soil layer, and thusfavoured the migr…