Search results for " compaction"

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.…

Neuromuscular disorders and non compaction: How much is the strength of the association and how can it be suspected?

2009

In many reports Finsterer and Stöllberger reported a strong association between non compaction of the left ventricle and neuromuscular disorders. In the same report the authors described a neurological involvement in more than 50%. Recently we published our personal experience, about 21 paediatric patients: only 4 patients (19%) showed a neuromuscular disorder, and only 1 of them showed an increased plasmatic level of CK, and in particular of MM isoform, with a normal level of CK-MB. None presented high levels of troponine. Through the experience of 3 centres we collected 61 patients affected by non compaction that performed a neurological control, and only 14 (21%) were affected by neuromu…

Neuromuscolar disorders and non compaction reply

2009

LOW EF: THE BEST MARKER OF POOR PROGNOSIS IN PATIENTS AFFECTED BY NON COMPACTION.

2007

N.A.

Sistemi per la valutazione del compattamento dei terreni agrari

2005

The traffic of agricultural machines can cause soil compaction, reducing, above all, its porosity. The measurement of soil cone penetrometer resistance is the easiest and quickest method for monitoring and assessing soil compaction. The aim of this research is to test two mechanised systems for the geo-referenced measurement and, therefore, producing maps of soil cone penetrometer resistance. The first system was developed mounting an electronic penetrometer and a DGPS mobile receiver on a tracked minitransporter. The second system was built mounting, on a frame fixed to the front part of a tractor: four load cells; a system for signal conditioning and data acquisition; four rods and penetr…