Recent work indicates that accumulation of amino sugar N in soil reduces the yield response
of corn (Zea mays L.) to N fertilization, and that nonresponsive sites are detectable by …

Harmful environmental effects resulting from fertilizer use have spurred research into
integrated nutrient management strategies which can include the use of specific micro …

A laboratory study was conducted to compare the effects of different N fertilizers on emission
of N 2 and N 2 O during denitrification of NO 3–in waterlogged soil. Field-moist samples of …

Conventional steam‐distillation techniques for fractionating the N in soil hydrolysates have
generally indicated little variation in the chemical distribution of soil organic N, regardless of …

A laboratory incubation experiment was conducted to compare the mineralization of N from
15 N-labelled soybean (Glycine max L.) tops, vetch (Vicia villosa Roth.) tops and corn (Zea …

Nitrate has been found to accumulate more rapidly in soils fertilized with urea than with
inorganic sources of NH 4+, despite the fact that nitrification must be preceded by hydrolytic …

Diffusion methods previously developed for inorganic-N analysis of soil extracts were
modified to improve reliability, increase the dynamic range, extend the scope of applications …

The stable nitrogen isotope (15 N) analysis of ammonium (NH4+) and nitrate (NO3–) is
widely used in ecological research, providing insights into N cycling and its underlying …

Nitrogen fertilizer is a potential contaminant of groundwater supplies. The purpose of this
study was to determine the influence of recommended N fertilizer rate and timing on N …

Summary Three Illinois Mollisols were incubated for 2 weeks at 25° C after treatment with
different amounts of glucose and/or 15 N-labelled (NH 4) 2 SO 4 or 15 N-labelled KNO 3 …