Search
Results for “calcium concentrations”
Showing 1–12 of 23 results
23 results — page 1 of 2
Q&A: Tackling calcium crystals in wine
Calcium instability in wine is a complex issue influenced by various factors. Dr Sami Yammine answers the most significant questions related to calcium crystals in wine and provides guidance on how to prevent them.
By Laffort · 7 min read
Impact of grapevine nitrogen fertilisation on YAN levels in the juice
PHOTO: Johannes Richter.
By Doronae · 7 min read
Winetech vine and wine innovation watch: Magnetic nanoparticles for the protein stabilisation of wines
ILLUSTRATION: Shutterstock.
By Karien O'Kennedy · 5 min read
Calcium tartrate instability of wine
Tartrate instability of wine is usually associated with the appearance of cream of tartar or potassium bitartrate crystals, also known as wine diamonds, in chilled white wines.
By Charl Theron · 4 min read
Recompaction of soil in existing vineyards - causes and upliftment methods
Recompaction of the prepared soil before establishment is unavoidable due to normal soil processes, management practices and cultivation practices in the vineyard.
By Johan de Jager & Bennie Diedericks · 12 min read
Treated municipal wastewater for irrigation (Part 1): Irrigation application and water quality
This study’s objectives were to assess the quality of treated municipal wastewater (TMW) used for irrigation of commercial vineyards and to quantify the amount of plant nutrients applied via TMW irrigation.
By Carolyn Howell, Karla Hoogendijk, Philip Myburgh, Vink Lategan & Eduard Hoffman · 15 min read
Calcium tartrate instability
Calcium-induced instability is a most insidious problem in bottled wines mainly due to the unpredictable and slow formation of crystals, which usually do not come out of solution for some time after bottling and often after commercial release.
By Carien Coetzee · 10 min read
Biosand reactors as a feasible solution for the treatment of winery wastewater (Part 1)
A number of laboratory-based and pilot studies have been conducted to determine the effectiveness of biosand reactors for the remediation of winery wastewater.
By Gareth Holtman, Rainer Haldenwang & Pamela Welz · 8 min read
Treated municipal wastewater for irrigation (Part 4): Soil chemical responses
This study’s objective was to assess the effects of long-term irrigation with treated municipal wastewater (TMW) on soil chemical properties in commercial vineyards in the Coastal region of the Western Cape.
By Carolyn Howell, Karla Hoogendijk, Philip Myburgh, Vink Lategan & Eduard Hoffman · 18 min read
In-field fractional use of winery wastewater with raw water (Part 2): Irrigation application, water quality and nutrient load
The primary objective of this project was to assess the fitness for use of winery wastewater for irrigation of different soil types with varying rainfall quantities and leaching levels on vineyard performance in terms of yield and quality under field conditions.
By Carolyn Howell & Reckson Mulidzi · 19 min read
In-field fractional use of winery wastewater with raw water (Part 3): Soil responses
The aim of this study was to determine the effect of in-field fractional use of winery wastewater with raw water for vineyard irrigation on the chemical status of different soils to assess the fitness for use of winery wastewater for irrigation of different soil types with varying rainfall.
By Carolyn Howell & Reckson Mulidzi · 20 min read
Vine and wine innovation watch: The use of carrageenan in calcium tartrate and protein stabilisation of wines
Research is focused on discovering new potential stabilisers that can reduce the likelihood of calcium tartrate precipitation.
By Karien O'Kennedy · 6 min read
