For apple download CherryTree 1.0.2.01/14/2024 Sampling was done at full flowering, end of veraison and at a brix level of 21%. 45:0:0) levels of fertilizer each year and each parcel was divided to three sub-plots with marked vines serving as replicates. Each vineyard was divided into two parcels receiving high (90N:40P:100K ha-1) or low (Ca. Leaf blades and petioles of 'Cabernet Sauvignon' vines were sampled for 7 years in the center and north of Israel. A third requirement involves human error-the sensitivity of the result to the exact timing and tissue (leaf position) used. The two basic requirements for reliable analysis are that they 1) are reproducible and not dependent on climatic factors, and 2) reflect differences between plants with different mineral status (different levels of fertilization). Tissue analysis is used in annual and woody crops as a tool to aid decision making about plant needs, usually in reference to a determined threshold.
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