Completely fill out the INFORMATION SHEET, using the following guidelines:

     - Identification of the vineyard area. This will be used in making the fertilizer suggestions. If you do not already have a number system for your vineyard blocks, perhaps this is a good time to start.

     - Vine size. Estimate the pruning weight (in pounds) for these vines when dormant and at a date of sampling. Estimate the percent of trellis which is filled with foliage.

     - Leaves. List abnormalities; scorch, interveinal chlorosis (yellowing), etc.

     - Pruning. Describe the severity (example 30 + 10, or mechanically with hand follow-up, etc).

     - Yields. Tons per acre for these vines.

     - Vineyard site. Evidence of poor drainage; mottling of soil, evidence of erosion, etc.

Time of Collection

Collect samples at least 70 days after full bloom (preferably after veraison) but before harvest. This assumes that the leaf area is still healthy and has not been destroyed by fall freezes or disease infections. Bloom Sampling is occasionally more useful, especially for nitrogen and boron analysis. Collect at the 50% bloom stage.

Selecting the Vines

Select a uniform area to be sampled. Vines sampled should be representative of a problem area or the average of the vineyard (do not include problem areas with normal areas in the sample.) The fertilizer recommendations will apply ONLY to the area represented by the sample. If vine conditions vary considerably within a vineyard, a sample will be needed for each distinctly different area. Where the vineyard is uniform, one can test up to 10 acres of vineyard with each sample. Each variety should be sampled separately, even if conditions appear to be similar to another variety in an adjacent block.

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