For now, a good rule of thumb would be to drop 1,000 seeds per acre for every inch of average annual precipitation. Many herbicides are available for use in corn. However, in dryland no-till corn, some herbicides have limited use because of their soil incorporation requirement. Other herbicides may have limited use because of their rotational crop restrictions. Wild oats, Russian thistle and some winter annuals can be troublesome weeds in corn.
Banvel herbicide controls most broadleaf weeds when applied according to label recommendations.
For wild oats and grasses, Accent herbicide performs well in no-till corn. Accent has a short rotation interval for most subsequent crops. Atrazine herbicide is another option for controlling wild oats and broadleaf weeds when growing continuous corn. Please refer to herbicide labels when selecting herbicides for your farm. EC 750, January 1996, Fertilizer Recommendations Guide, Cooperative Extension Service, South Dakota University, is an excellent publication to start with when determining fertilizer needs for dryland corn.