For the first time Anton
and Sergi decided to pick their Chardonnay grapes mechanically. The vines
are trellised (a requisite for machine picking) and the small Chardonnay
grapes are very time consuming to pick by hand.
The machine basically shakes all the grapes off the vine, whilst the
conveyor belt beneath collects them all. The main disadvantage of machine
picking is that it produces more juice than hand picking, which could be
a problem if the grapes are
left in the sun for a couple of hours before being pressed, but in this
case, no sooner were they unloaded from the machine, as they were off to
the cooperative and unloaded straight into the presses
: Elapsed time
was around five minutes! To achieve this, they used two tractors, and as
soon as Sergi returned from unloading one, the other was ready to depart.
On arrival at the cooperative, a sample is taken from each trailer-load
for analysis. After weighing in, the
sugar content
is analysed instantly, and a small test tube sample kept for further analysis
(degree of acidity - whether there is any rotten fruit etc). The combination
of the two analyses will determine the price paid per kilo of grapes.
Usually a price is established per
kilo at 10° sugar content. Every degree above ten raises the price by
10% barring deductions for lower quality determined by the second analysis.
Hence if last year Chardonnay was paid at around 70 Pesetas per kilo,
a tractor load at 11° would be
paid at 77 and so forth. This year's harvest came in at between 11.8 and
12 degrees.
Once weighed and analysed, the grapes are unloaded. Note the difference
(right)
between grapes
harvested by machine (on the left of the photo) with those picked by hand.
The machine harvested grapes are just that - individual grapes, whereas
the hand picked grapes are picked in bunches. Machine picked grapes therefore
have less contact with the "stalks" and is less likely
to pick up taste from this source.
Having unloaded, Sergi has to weigh the empty tractor - and rush back
for more. The cost of the machine is expensive, and nobody wants it hanging
around idle!
To follow what happens to the grapes as their are made into wine check
out our wine making (white) page.