Received for publication April 4, 1978. This work was supported in part by a Canada National Research Council Industrial Research Assistance Program grant. Summerland Research Station Contribution No. 429. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper must therefore be hereby marked advertisement solely to indicate this fact.
The authors are indebted to Mr. R. A. MacDonald for technical help.
|All Time||Past Year||Past 30 Days|
|Full Text Views||27||27||0|