Crop injury resulting from magnesium oxide dust
Soils from the fields surrounding a magnesite plant in Washington were collected and transferred to a greenhouse. The samples of soil were taken from 40 rods north, 160 rods south, and 640 rods south of the calcining plant. Five grams of chemically pure MgCO/sub 3/ were added and mixed in one pot, the other pot contained 1000 grams of air dry soil. Oats were planted, with results after ten weeks. The oats in untreated soil taken at a distance of 40 rods from the plant all sprouted, but showed much the same brownish-yellow and generally sickly and stunted characteristics that were noted in the fields around the plant. The treated soil taken at a distance of 160 rods from the source of the dust produced a crop failure. Soil from a distance of two miles produced good oats under both conditions. It was concluded that magnesium, when present in soils beyond certain amounts, produced injurious effects on this cereal, and that the normal soil in the valley in localities where it is outside the zone of influence from the calcining plant did not carry enough magnesium or alkali salts to cause injury to crops. 1 figure.
- OSTI ID:
- 6352583
- Journal Information:
- Phytopathology; (United States), Vol. 14:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
MAGNESIUM
TOXICITY
AIR POLLUTION
BIOLOGICAL EFFECTS
DUSTS
LAND POLLUTION
MAGNESIUM CARBONATES
OATS
SOILS
WASHINGTON
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CARBON COMPOUNDS
CARBONATES
CEREALS
ELEMENTS
FEDERAL REGION X
GRAMINEAE
GRASS
MAGNESIUM COMPOUNDS
METALS
NORTH AMERICA
OXYGEN COMPOUNDS
PLANTS
POLLUTION
USA
560303* - Chemicals Metabolism & Toxicology- Plants- (-1987)
510200 - Environment
Terrestrial- Chemicals Monitoring & Transport- (-1989)