A study was conducted to compare the competitive
ability with weeds of the short-strawed Gaines variety
wheat and taller growing varieties under different fertility
levels at three experimental locations. The
experiments were designed so that the effects of
variety, nitrogen fertilization, and weed competition
could be evaluated. The interactions between...
A study was made on the effect of CCC (2-chloroethyl)-trimethyl-ammonium
chloride), a plant growth retardant, on the RNA (ribonucleic
acid) content of wheat plants, It was found that the RNA content of
wheat leaves generally decreased with increasing levels of CCC up to
1x10⁻⁵M. Thereafter, the RNA content again increased...
Application of herbicides to the soil has become an important
factor in the production of row crops. Economic production
of sugar beet (Beta vulgaris), an important row crop, requires
efficient methods of weed control.
Two experimental herbicides, 3-cyclohexyl-5,6-trimethylene
uracil (DP634) and 2-bromo-6't-butyl-o-acetotoluidide (CP32179),
had shown promise in sugar beet screening...
Studies were conducted to determine the site of DCPA toxicity
on annual ryegrass. This was done by means of a technique which
used pyrex tubing and a vapor barrier to separate exposure of coleoptile
and roots of emerging grass seedlings to various concentrations of DCPA. Coleoptiles that emerged through treated...
Atrazine, atratone and ametryne are asymmetric s-triazine
herbicides used pre- and post-emergence on many crops. Under
conditions unfavorable for microbial activity, these compounds
may persist in the soil for long periods of time.
This study was conducted to determine the influence of the
soil microflora upon atrazine, atratone and ametryne...