Effect of subherbicidal levels of 2, 4-D, isoproturan and atrazine on the nitrogen metabolism and growth of oats (Avena sativa Linn.)

Foliar application of 2, 4-D, isoproturan and atrazine at subherbicidal concentrations on oat crop caused enhancement of nitrate reductase activity, protein and chlorophyll content, plant height, number of tillers per plant, leaf area index and total dry matter production. The subherbicidal doses also caused increased N uptake by the crop. The results show that at subherbicidal levels 2,4-D, isoproturan and atrazine act as growth regulating substance and can be used to improve yield under field conditions.