Greater knowledge of inorganic and organic N effects
on weeds and crops grown in competitive mixtures may
allowfor a better understanding of why differences
occurred among previous studies and would aid development of fertilization strategies as components of more
comprehensive integrated weed management programs.
A field experiment was initiated to determine the
response of selected weed species and winter wheat to
N fertilizer, fresh cattle manure, and composted cattle
manure applied at planting in the fall or in-crop the
following spring. Treatments were applied in four
consecutive years to assess both annual and cumulative
effects over time