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| WATER TESTING |
WATER QUALITY
Like all quality products the end result is determined by the inputs made during the production process;
eg the root stock - the location - the soil - the water - the nutrients & fertilisers - the management - the harvest date - the transport - the processing - the storage - the packaging - the delivery.
Once the grower has established the vineyard the key factors they control are water, fertilisers & nutrients, and management.
A new product which Sentek has released allows the grower to extract solution (water) samples from the root zone. Analysis of these samples can be used to determine the levels of existing nutrients in the soil.
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SOLU-SAMPLER
 This unit is installed at the desired location in the root zone, then a vacuum is applied to the soluSAMPLER to allow the solution extraction to commence. Depending on soil type and the season a sample could take from an hour up to a couple of days to collect.
This solution can then be tested for pH, EC and dissolved oxygen in the field. The collection process can be integrated in to existing soil moisture collection services, thus reducing the labour cost for collection.
The samples can be further analysed to determine Nitrate, Boron, Phosphate and other nutrients.
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HQ40 D pH,EC & LDO tester
The HACH HQ40d allows the user to do in-field analysis of various types of water quality testing.
pH Levels
Acid Soil - A soil whose soil solution has more hydrogen ions than hydroxyl ions, giving it a pH below 7. Increased soil acidity can cause plant growth to be reduced.
Alkaline Soil - A soil with a pH of greater than about 7.3, or a high sodium content, or both. The growth of crop plants may be reduced in highly alkaline soils.
EC
Soil salinity has the most immediate impact on vine performance, particularly if saline water is used for irrigation.
Source go to....
See EC Table below
DO / LDO
For further information on the HQ40
go to .....
or contact Mick Pepler 1800 723 405
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Salt tolerance in vineyards
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Current Status
Current Status
How the new weather station integrates with IPV.
The key to IPV is not only the collection of data in a accurate, reliable and timely manner, just as important is the timely use of the data collected.
Because our industry is at the mercy of the climate and weather, we live in a very dynamic environment constantly changing. This being the case monitoring these variables in real-time can help greatly in management. Let's look at some examples:
Spraying: "You are a contractor and intend to head up to clients property 6km away to spray, before you leave a quick phone call will provide you with the current wind speed, wind direction and temperature of the area you are heading to.
In addition you have set an alarm on the local station to send you an SMS if the wind speed exceeds 10kmh (excessive drift) or changes to a southerly (Neighbours house).
At the end of the day you can download the weather data that spans your spraying period, and include it with the spray report, this ensures if any complains about spray drift you can prove you took necessary step to minimise any problems.
Diesease Management Weather condition can apply here as well - Example: "Phomopsis viticola: pathogenicity and management"
EXTRACT
Favourable conditions
The development of Phomopsis cane and leaf spot disease is greatly influenced by weather conditions, inoculum density and host growth stage. Environmental conditions must be favourable for development and subsequent spread of the disease.
Prolonged periods of rain and cold weather aid in the development of the disease. Pycnidium production requires cool temperatures. At least 10 hours of rain, combined with relatively low temperatures, are required for spores to be produced and a further 8-10 hours of moist conditions for infection to occur (Emmett et al., 1992). Spores require water to germinate, and infection has been found to occur within a few hours in free water or 100% humidity (Hewitt and Pearson, 1990). The optimum temperature for spore germination and fungal growth is 23°C (Patil et al., 1981). Berry infection is favoured by 20-30-hour wet periods during flowering. High levels of moisture during flowering are unlikely to occur in most viticultural regions in Australia, therefore bunch infection is rarely seen.
Source: GWRDC - "Phomopsis viticola: pathogenicity and management"
Go to Report
From the above examples the ability to access timely weather data is a esential part of vineyard management.
Our trial site weather station should be online by Friday next week
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Created on 2008-01-04 13:35:49 by george
Updated on 2008-07-24 22:50:06 by george
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| Weather - Other Regions |
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SOURCE:Weatherzone |
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