MOBILITY OF THREE HERBICIDES IN TWO DIFFERENTSOIL TEXTURES

Abstract

This research carried out to estimate mobility three herbicides (Basta
٢٠%, Weedoff ٤٨%, Carbyne ١٢.٥%) it might be reach on water table and
polluted it. We definite the mobility by hydraulic conductivity it depends on
liquid and soil feature.
The samples collected from two locations Kefel was first one sandy soil
belonged to Orthids group and second one was Mishkab clay soil belonged
to Torrifluvents group. Soil columns had been prepared by three replicates to
each one. So the H.CO determinated with constant head method to sandy
soil and variable hydraulic gradient to clay soil. The H.CO measures made
by two stages: ١-First stage treatments (٣ soil herbicides vs control)
٢- Second stage treatment (٣ soil + herbicides + drying vs control).
The results analysised by C.R.D. design with Dunnett's method to mean
comparison it were :
Carbyne > Water > Basta > Weedoff in sandy soil
Water > Weedoff > Basta > Carbyne in clay soil
It refers to Carbyne herbicide mobile by H.CO(٠.٥٧) cm.min-١ with
significant deference (D٠.٠٥ = ٠.١٢) vs other . It might be reach on water
table as well as Weedoff succeeded by H.CO (٠.٠٥) cm.min-١ with (D٠.٠٥ =
٠.١٢٢) vs others but that meant no risky than H.CO of control.