Search results for "soil sample"

showing 3 items of 3 documents

Differenziazione e quantificazione dei carbonati litogenici e pedogenici di Gypsisuoli forestali attraverso l'analisi isotopica

2004

Gli autori riferiscono sui tipi e sui modelli di genesi dei carbonati dei suoli, attraverso l’uso degli isotopi del 13C. Lo studio è stato condotto in un’area dell’interno collinare argilloso siciliano, su suoli che evolvono sui depositi evaporitici della Serie Gessoso-Solfifera. Sono stati scelti cinque pedon su litotipi calcarei e non. I pedon sono stati descritti in campo e campionati secondo la sequenza degli orizzonti genetici; sui campioni di suolo sono state eseguite le seguenti analisi: tessitura, reazione, conducibilità elettrica, gesso, carbonio organico ed inorganico. Inoltre, parallelamente sono state eseguite le analisi isotopiche del carbonio organico ed inorganico. I risultat…

Authors report on forms and soil carbonate formation models as detected by 13C isotopes. This study was carried out in a clayey hilly area of central Sicily where soils have developed on evaporitic deposits of “Gessoso-Solfifera” Formation. Four pedons were selected both on calcareous and no calcareous lithotypes. Pedons were described in field and sampled according to sequence of genetic horizons. Soil samples were analyzed to investigate the following properties: particle size distribution reaction electrical conductivity gypsum organic and inorganic carbon. Moreover isotopic analyses were performed on organic and inorganic carbon. Results allow us to describe the complex relationships between biotic and abiotic soil components. In addition models of calcic horizon formation and their implication in soil classification were defined.Settore AGR/13 - Chimica Agraria
researchProduct

Manual packing and soil reuse effects on determination of saturated hydraulic conductivity of a loam soil

2022

Abstract Performing laboratory measurement of saturated hydraulic conductivity, Ks, of sieved soil is important for many scientific purposes such as testing theories and methods to determine Ks. A given soil mass can be used only once or it can be reused after a previous use. Little is known on the dependence of the Ks measurements on both the applied packing method and the reuse of the same soil mass. This lack of knowledge makes comparisons among different investigations more or less uncertain. Four packing methods were tested on an initially dry loam soil by measuring Ks with the simplified falling head (SFH) technique. The four methods differed by the used compacting procedure (dropping…

Soil ScienceMeasurement repeatabilitySoil scienceRepacked soil sample preparationReuseHomogenization (chemistry)Laboratory experimentHydraulic conductivitySample size determinationSimplified falling head techniqueLoamSoil waterEnvironmental scienceSoil horizonSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliSample preparationSoil water transmission properties
researchProduct

Soil quality - Method to directly extract DNA from Soil Samples. ISO/ DIS 11063

2010

DNA (deoxy ribonucleic acids) is an essential component of any living organisms coding for enzymes responsible for any biological activities. The study of DNA sequences from DNA sources extracted from different matrixes, by means of numerous molecular approaches, provides molecular markers that can be used to sharply distinguish and identify different organisms (bacteria, archaea and eucaryotes). Up to now, most of the studies aiming to develop microbial soil quality indicators applicable to complex environment, such as soil, were biased by the unculturability of many microorganisms and the lack of sensitivity of traditional microbiological methods. The recent development of numerous molecu…

norme[SDV] Life Sciences [q-bio][SDE] Environmental SciencesmethodextractionISODNAISO/ DIS 11063soil sample
researchProduct