Premium
Relation of Soil Potassium and Magnesium to Magnesium Nutrition of Citrus
Author(s) -
McColloch R. C.,
Bingham F. T.,
Aldrich D. G.
Publication year - 1957
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1957.03615995002100010017x
Subject(s) - magnesium , potassium , magnesium deficiency (plants) , human fertilization , chemistry , fertilizer , agronomy , orange (colour) , horticulture , biology , food science , organic chemistry
Soil and leaf analyses were made in connection with six field experiments involving orange trees fertilized with potassium and/or magnesium. Experimental plots were located in 6 orchards in 4 southern California counties. The concentration of magnesium in spring‐cycle leaves was correlated with the degree of leaf symptoms characteristic of magnesium deficiency. Addition of magnesium fertilizer resulted in a marked increase in leaf magnesium and a disappearance of deficiency symptoms. Potassium fertilization accentuated magnesium deficiency. Deficiency symptoms were associated with leaf magnesium concentrations of 0.20% or less. The ratio of exchangeable K/Mg in the soil (particularly the 18‐ to 30‐inch depth) was highly correlated with the percent magnesium in the leaves.