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Relationship of Total and Hot-Water Soluble Boron, and Fixation of Added Boron, to Properties of Podzol Soils¹

ABSTRACT

Total and hot-water soluble B content of soils ranged from 45 to 124 and 0.38 to 4.67 ppm, respectively. The largest quantities of hot-water soluble B were recorded in Acadia silty clay loam, Caribou silt loam, and Interval loam to silt loam soil series. Water-soluble B was comparatively low in soils derived from Permo-carboniferous rocks.

In general the B content was lowest in coarse- and highest in fine-textured soils. Percent of total B in the hot-water soluble form varied from 0.44 to 4.69, with the highest percentage occurring in the fine-textured soils and lowest in the coarse-textured soils.

Hot-water soluble B content was higher in "well-managed" soils than in "neglected" soils. The quantities of such B were positively correlated (significant at p = 0.01) with organic matter and with total B.

Higher amounts of B were fixed by soils after incubation periods of 8 and 12 weeks than after 2 and 4 weeks. A higher percentage of B was fixed in the O'Leary sandy clay loam than in the Dunstaffnage sandy loam soil with all incubation periods. Varying the moisture content of soil from 50 to 100% of the field capacity did not affect the B fixed over a 12-week period.

¹ Contribution no. 172, Res. Branch, Res. Sta., Box 1210, Canada Dep. of Agr., Charlottetown, P. E. I. Presented before Div. S-4, Soil Science Society of America, Nov. 7, 1967, at Washington, D. C.

² Research Soil Scientist, Canada Dep. Agr., Charlottetown.

Received for publication June 11, 1967. Accepted for publication August 16, 1967.