LaMotte SMART 3 Electronic Soil Lab - Manual (Page 69)

SMART3 Soil 1.11 69
MANGANESE – HIGH RANGE
PERIODATE METHOD • CODE 3669-SC
QUANTITY CONTENTS CODE
10 g Manganese Buffer Reagent 6310-D
15 g *Manganese Periodate Reagent *6311-E
1 Spoon, 0.1 g, plastic 0699
1 Spoon, 0.15 g, plastic 0727
*WARNING: Reagents marked with an * are considered to be potential health
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents
go to www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail,
phone or fax.
The amount of manganese available to the plant is dependant upon the soil pH,
the quantity of organic matter present, and the degree of aeration. Manganese
deficiency is most likely to occur in neutral or alkaline soils because it is less
soluble at elevated pH levels. In extremely acid soils, where manganese is
more soluble, toxic levels may exist which may reduce crop yields. In slightly
acid sandy soils, manganese may leach past the root zone and not be able for
utilization by the plant. Also, it is believed that manganese may form insoluble
organic complexes in some soils that have high humus content. All of the factors
contribute to the availability of this essential element. Only soil or tissue tests
can determine whether deficient or toxic levels of manganese exist.
Although manganese is known to play an important role in many of the
metabolic processes in the plant, little is known about its function other than
it is required in some enzyme reactions and is required for the formation of
chlorophyll in the plant.
APPLICATION: 0.00-75.00 ppm Manganese
METHOD: Periodate method
INTERFERENCES: Reducing substances capable of reacting with
periodate or permanganate must be eliminated.
Chlorine in small amounts can be oxidized by
periodate.
Test P
rocedures