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Agronomy Journal Abstract -

Forms of Nitrogen and Nitrogen Availability in Fescuegrass Sod1


This article in AJ

  1. Vol. 63 No. 3, p. 458-460
    Received: Oct 3, 1970

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  1. Joel Giddens,
  2. R. D. Hauck,
  3. W. E. Adams and
  4. R. N. Dawson2



Organic N fractions and 15N uptake by sudax (Sorghum vulgare), a sudan × sorghum hybrid, were determined in soils that had been in fescuegrass (Festuca arundinaceae) 0 through 5 years and in soils that had been taken out of fescuegrass 0 through 5 years.

Percentages of N in the distillable acid-soluble, nondistillable acid-soluble (amino acid N), and nonacidsoluble fractions did not change appreciably. Total N increased with age of sod and decreased with length of time sod had been plowed into the soil. Soil N content had no significant effect on the uptake of 15N-labeled NH4Cl applied at a single N rate. The nitrogen percentage taken up by sudax from the soil, however, increased as the soil nitrogen increased.

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