The same profitable T/A techniques work on the ag futures products too. I have done backtesting work and found results that were robust from the same system used with index futures contracts.
A huge influence on grains market are supply and demand as well as rumors, weather expectations, etc .... As far as TA is concerned support & resistance levels are most trustworthy. Compared to stocks none of the agriculturals will ever trade close to 0
I use the feltontrading.com method with stoch and macd, and I will be beta testing the felton automated system on several ag contracts in the next few weeks. So far all my preliminary work looks very good on non-index futures contracts for the trade system. The automated system has been currently testing on index futures products.