Premium
Critical Manganese Deficiency Level of Soybean Related to Leaf Position 1
Author(s) -
Ohki K.,
Boswell F. C.,
Parker M. B.,
Shuman L. M.,
Wilson D. O.
Publication year - 1979
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/agronj1979.00021962007100020004x
Subject(s) - leaf blade , yield (engineering) , agronomy , biology , glycine , horticulture , manganese , seedling , zea mays , botany , chemistry , materials science , organic chemistry , amino acid , metallurgy , biochemistry
Correct interpretation of results from plant analyses depends on many factors which include sampling the appropriate leaf blade for microelement analysis. Although numerous reports conclude that the recently matured leaf should be sampled for tissue analysis, specific information relating concentration of leaf‐blade Mn by leaf position to yield of field‐grown soybean ( Glycine max (L.) Merr.) yield has not been reported previously. A 2‐year field study was conducted on an Olustee‐Leefield sand (Ultic Haplaquod‐Arenic Plinthaquic Paleudult) to determine the most ap ropriate leaf on the main axis for tissue analysis. Leaf samples were taken at the R2 growth stage (flower at node immediately below the uppermost node with completely unrolled leaf) from plots treated with 0 to 56 kg/ha Mn. Leaf blades sampled were one (top) down the axis in sequential order through blade five. Relationships between leaf Mn concentrations and seed yield over 2 years showed that critical Mn deficiency levels for blades one through five were 18, 13, 11, 11, and 10 µg/g, respectively. The critical deficiency levels for each leaf position were similar between years.