CORESTA Congress, Paris, 2006, APOST 05
Concentration ranges in typical nutrient deficiency for dark tobacco seedlings
Tobacco Research Institute, Cuba, Institute of Plant Nutrition, Germany.
For some plant species the range of known visual symptoms due to deficiency, toxicity or imbalance of plant nutrients or other elements is very large, but for other is not so (Martin-Prével and Gagnard, 1987). The deficiency ranges for black tobacco...