I found an article in your winter issue dealing with heliotrope very interesting. My observations and experience are that heliotrope can be controlled by lucerne undersown with cereals. The proof became evident in a lucerne paddock last year where in 1998 an approximate six-foot section of a wideline seeder apparently did not engage. The result was no lucerne and all heliotrope for a couple of strips and no heliotrope in the lucerne crop.
Our experience is that lucerne, once well established, also keeps Bathurst burrs under control. We find among the advantages of lucerne: higher stocking rates; wheat following canola does not need extra urea; and the fertility is such a record high-yielding wheat crop is easily achieved.
A lucerne rotation is also a splendid salinity control in mixed farming situations of less than 21 inches of rain or thereabouts.
Your publication is very informative.
Phil O'Hare Beckom, NSW
Ground Cover welcomes letters on farming issues and policies and we'd also love to receive more written feedback on how Ground Cover, High Grains and other GRDC publications are tracking in providingyou with practical research informa