Forms of Nitrogen and Nitrogen Availability in Fescuegrass Sod1
- Joel Giddens,
- R. D. Hauck,
- W. E. Adams and
- 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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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