1,721,063 research outputs found
Le opportunità di impiego dei tannini di castagno a livello agronomico. Interazioni con azoto, fosforo e ferro
No full textSono stati oggetto di comunicazione: gli impieghi dei tannini di castagno a livello agronomico, con particolare riguardo alle interazioni con l’azoto, il fosforo e il ferro ed alla riduzione dell’attività microbica ed enzimatica sulle ureasi, che consente la migliore utilizzazione agronomica dell’azoto. Gli studi sullo stimolo rizogeno e la verifica sperimentale dell’attività di protezione della pianta da attacchi di nematodi galligeni mediante somministrazione nell’acqua irrigua
Aspetti agronomici e tecnici dal dopoguerra fino ad oggi: materiale raccolto dalle relazioni di fine anno
No full textSono esaminate le innovazioni tecniche introdotte nell'Alta Valle del Tevere che hanno comportato ricerche agronomiche specifiche, anche con il contributo diretto dell'Autore e del DAGA. Si ricordano, in particolare: la concimazione mirata gestita con sistemi informatici, la concimazione liquida, la concimazione localizzata con microgranulati starter, l'impiego di sostanze naturali (tannini) con funzione starter, nematostatica ed antiossidante, le bioenergie per la riduzione dei costi di cura del tabacco, la produzione di tappeti erbosi da rizollatura per l'utilizzo prolungato dei semenzai, la microirrigazione e la determinazione del Kc del tabacco nell'area
Advances in float system transplant production: growing media and trays
No full textA patented new growing medium (NGM), made of biodegradable polyurethane agglomerated peat, was developed. On a weight basis, it consists of water (80%), peat (12-15%), and aggregating polymers (5-8%). The use of materials alternative to peat is under study. Among them, a promising one is bark fiber. Several plug shapes (also concerning seed niche) and sizes have been investigated over the time. A TFS-TP system was developed, consisting of plug units of the NGM, floating on a reusable polystyrene foam flat panel. Management in the greenhouse is similar to a standard TFS-TP system. Also more environmental-friendly alternatives to polystyrene foam panels are under study: made both of biodegradable foam polymers (BFP) or BFP-agglomerated paper/wood derivative
Glycerol phase from biodiesel cycle: a potential feedstock for material and energy production
No full textGlycerol phase from biodiesel cycle. A potential feedstock for direct use and process
No full textThe development of Fatty Acid Methyl Esther technology based biodiesel production has increased crude glycerol availability worldwide for the last years. After a period of low prices, which stimulated basic and applied research, in order to use crude glycerol as a platform for “green” materials and energy production, a very recent bullish market has cooled the enthusiasm for these prospects. However, several direct uses and processes have been investigated and, after a careful economical evaluation, can be exploited as downstream activities of F.A.M.E. production
Ve.Pro.L.G. to tune microirrigated tobacco to given water and field conditions
No full textAlthough its positive results, microirrigation diffusion over the years has been frequently slowed down by shortage of affordable plant design and operation. To overcome these problems and aim at maximum water and energy savings, a SW, named Ve.Pro.L.G./s, was released by LNI (Natl. Lab for Irrigation)-DAGA and ARSIA (Tuscany's Agency for Agriculture). This SW helps project dripping tapes, irrigation sectors, and microirrigation plant parts, to cope with actual field conditions and crop requirements. At the operating stage, it verifies the operation of the dripping tapes, and suggests possible plant modifications to improve its efficiency. It calculates also: soil washed out and crop used water volumes, irrigation energy consumption, annual cost of dripping tapes on a field or a broader area basis, and plans water resource use on a given territor
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