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Critical Levels of Manganese and Magnesium in Cotton at Different Stages of Growth 1
Author(s) -
Gheesling R. H.,
Perkins H. F.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200010010x
Subject(s) - manganese , magnesium , nutrient , leaf blade , plant growth , agronomy , magnesium deficiency (plants) , horticulture , chemistry , biology , organic chemistry
Cotton was grown 105 days in washed silica sand and subjected to levels of Mn and Mg above and below amounts necessary to create visual deficiency symptoms. Leaf blades were found to be the best indicator of the nutrient status of Mn and Mg. The levels below which Mn deficiency was evident in the blades were 15 ppm. Plant leaf blade tissue containing less than 2,000 ppm Mg exhibited Mg deficiency. Leaf petioles and stems were less desirable as indicators of the Mn and Mg status of cotton than leaf blades.