Argentina Flashcards
brief history of Argentina
- 15th century spanish settlers, then indipendence, europeans (italy, spain, france) bring viticolture and varietals with them before philoxxera
- political crisis 20th century, high domestic market of inexpensive wines
- fall of domestic market in the 70s, Nicolas Catena looks for export market focusing on quality (also economic push from Rolland, Paul Hobbs, Alberto Antonini), malbec becomes popular
latitude and altitude
latitude LOW (so you need altitude)
altitude HIGH (500mt lowest up 3300mt)
even at highest altitudes where are vineyards planted?
on flat or gently slopes sites
main influences of high altitude
- wide diurnal range (extend growing season = retain aroma and acidity)
- high proportion of ultraviolets radiation (high levels of tannins anto anthocyanins)
5 viticultural problems in argentina
- lack of rain
- strong winds
- hail
- frost
- el nino
lack or rain in argentina; why, how much and remedy
- rain shadow effect of the andes
- less than 200ml a year
- irrigation
also hot dry air reduce fungal
zonda wind: what it is, when, what it does, remedy
- strong hot dry wind, from the mountains gets into the valleys
- late spring, early summer
- reduce fungal; lowers humitidy (water stress); affects flowering, fruit set and damage grapes (reduce yields)
- trees (poplas) as windbreaks
hail: remedies and main problem
- netting (netting is too expensive for larger areas (only best sites are protected)
- multiple sites to minimise risk
where is frost a problem in argentina?
flat areas, bottom slopes both in high and low altitude
what is el nino? when occurs? problems?
- is a phenomenon/current
- every 2 to 10 years
- brings high rainfall and hailstorms - damage crops, increase diseases risk (can reduce up to 50% of the crop)
general soils of argentina
alluvial soils from rivers running down from the andes
specific soils of argentina by altitude
all of alluvial origin, all poor (low yielding) 1. high altitude - stones with calcareous deposits 2. mid altitude - gravel, sand, silt 3. low altitude - loam, clay
terroir studies on soils in argentina
recently studies are starting to emerge to check texture and soil composition especially of deposits of calcareous soils in top areas such as Gualtallary, Paraje Altamira (Uco Valley) and Pedernal Valley (San Juan)
plantings and vines age
200k ha (before it was more, fall of domestic demand) 30% is over 40 years old vines
lack of rain: three main remedies
- natural remedies
- flood irrigation
- drip irrigation
rain natural remedies to improve irrigation
- rivers (like river Mendoza)
- snow from the andes
- dams and irrigation channel (16th century)
- reservoirs
flood irrigation: what is it, why it works, how much water is used?
- water is released into a vineyard
- free draining soils absorbs into the soil, cheap (70% most used system)
- equivalent of a heavy summer rainfall
why drip irrigation is an option in argentina?
- is cheaper on new vineyards on slopes (they will have to lever the terrain instead for flood)
- areas with not sufficient sources of above ground water for flood (canals, river)
- better use of water and maximum control
used in Mendoza, La Rioja and San Juan
timing of irrigation
- high amounts in winter - replicate winter rainfall
- low amounts during growing seasons (from every 2 days to 2 weeks) for root growth
vine training in argentina
- parral (pergola) - traditional, to avoid ground heat and augment shading, used in warmer areas especially for torrontez (aromatics) or high yield (criolla chica/grande, pedro gimenez)
- VPS - better for modern canopy management/drip irrigation
grafting: is it used in argentina?
yes, mainly to avoid nematodes risks and to increase drought tolerance sandy soils/arid climate kills philloxera
is organic/biodynamic used and why?
yes, because of little threats of fungal diseases number is low but growing
harvesting in argentina
traditional is hand harvest (low pay labour) now machine: faster, cheaper, few labourers for low paid jobs
main modernisation in argentina viticolture
- drip irrigation
- canopy management
- clonal selection (nicolas catena on malbec)
- picking dates = wine styles
- different soil types study
- new areas are considered (higher on the mountains, closer to th atlantic ocean, and south areas)