CONTEXT Research has demonstrated that relationships exist between berry compositional changes during ripening and seasonal vine water deficit variations (here). The purpose of this blog is …
Effect of Sap Flow Profile on Berry Sugar Accumulation
Category: Irrigation
Should I Spray Nitrogen Early Season?
CONTEXT During a dry winter, soil nitrogen mineralization rate can be reduced. As a consequence, once the season starts and even if soil moisture is …
Managing vine water deficit with canopy height
CONTEXT Regardless of irrigation regime, canopy size can affect yield and berry quality attributes particularly under semiarid conditions. It may sound counterintuitive at first …
Linking vine water deficit with wine color density
CONTEXT An australian researcher team led by Cooley have compared different levels of water deficit severity to analyze their effect on berry and wine composition …
How well can Pinot Noir sustain drought conditions
The goal of the swiss study presented by Dr Zufferey was to investigate the impact of water stress on vine hydraulics, berry composition and wine …
Harvest under dry climates: High Sugar vs. High Color.
In this blog we discuss why adapting harvest date to a warming environment is challenging …and why you may not have to trade off sugar concentration to …
The berry sugar loading : an indicator of grape quality
What is sugar loading? The sugar loading of grape berries (evolution of the quantity of sugars per berry), widely described by Pr. Deloire during the …
Crop Coefficient (5) : How heat affects maximal vine water needs and water deficit?
Waves of heat = Waves of greater water needs As heat wave comes and goes, vine water use goes up and down as we discussed …
Crop coefficient (4) : how does heat wave effect water use?
How much does vine transpiration increase during a heat wave? To address that question, a team of Australian researchers led by Edwards reported the following observations …
Crop coefficient (3): monitoring transpiration ratio variations during growth
In our previous blogs we discussed how sap flow sensors can be used to characterize vine water needs under site- specific conditions. Various authors have …