Subterranean clover yield and nutrient content as influenced by soil molybdenum status Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cj82kb776

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  • During the Spring of 1969, 47 surface soil samples (0 to 15 cm) as well as foliage samples of subterranean clover were collected from 32 selected western Oregon pastures, in an effort to determine their molybdenum status and to evaluate the use of anion exchange resin method as a means of assaying available molybdenum. The five most acid soils were limed to 80 percent base saturation. Greenhouse experiments were established during September, 1969, to evaluate the effect of molybdenum fertilization of subterranean clover yield and nutrient content. Highly significant yield and total nitrogen responses of subterranean clover were obtained following molybdenum fertilization. Greatest percent yield as well as percent total nitrogen responses to applied molybdate occurred at the lower soil anion exchangeable molybdenum concentrations. Statistically significant correlation coefficients were obtained between anion exchangeable soil molybdenum and percent yield response to applied molybdate in the greenhouse studies (r = -0. 743); anion exchangeable soil molybdenum and plant nitrogen concentrations in field subterranean clover samples (r = 0.875); anion exchangeable soil molybdenum and percent total nitrogen response to applied molybdate in the greenhouse studies (r = -0. 560); anion exchangeable soil molybdenum and plant molybdenum concentrations in field clover samples (r = 0.861); anion exchangeable soil molybdenum and soil pH (r = 0.861).
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