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Boron deficiency in tobacco under field conditions

McMurtrey, J.E. Jr.
Agronomy journal 1935 v.27 no.4 pp. 271-273
Nicotiana tabacum, boron, NPK fertilizers, dieback, nutrient deficiencies, Maryland
The recent trend toward the use of relatively pure chemicals in the fertilizer industry emphasizes the importance of all elements essential to plant growth. After using such chemicals in preparing fertilizer mixtures for tobacco on a sandy soil for a period of 5 years pronounced effects of boron deficiency became apparent. The first indication of boron deficiency is a light green color of the bud leaves especially at the base of the individual leaves, which is followed rapidly by more or less breakdown of the tissue. When the breakdown does not involve all the tissue and later growth takes place, such leaves are distorted by growth around the injured areas. in the same manner the stalk toward the top of the plant may manifest a one-sided or twisted growth. The final manifestation is a dieback of the terminal bud. Lateral buds (suckers) may develop in the axils of the leaves or at the base of the stalk, but they usually break down as described above.