Manganese toxicity is a more likely problem and is generally prevented by maintaining the soil pH near 6.0. Cu column of the Recommendations section. Plant tissue analysis is a good way to determine a crop's need for zinc and copper. This technique is also useful in evaluating levels of nitrogen, sulfur and boron in the plant. Soil tests for these latter elements are of limited value.
Side dress the remainder at lay-by.
Because of potential nitrogen problems, planting tobacco behind legumes, or after recent application of farm manures, is not recommended. Plant tissue analysis is a good way to monitor the nitrogen status throughout the growing season. It accommodates adjustments based on soil type. Never exceed the higher rate on light-textured soils. Too much nitrogen causes ripening problems and reduces quality.