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Coonabarabran Update - General Plenary Day 2 - Feb 2014 pdf

Plain text source: 
The important factors in getting pre-emergent herbicide to work effectively while minimising crop damage are: to understand the position of the weed seeds in the soil; the soil type (particularly amount of organic matter and crop residue on the surface); the solubility of the herbicide; and its ability to be bound by the soil... Weed seeds will most likely absorb herbicide if the herbicide is at or below the seed in the soil profile... Only some of the mutations provide resistance to both groups of herbicides...