Some would assume that too much of watering is leading to the situation where the weeds grow in plenty than the actual crop that is to be grown in the fields. Also, there is one more myth that the weeds would grow even on the dry lands where no other crops are grown with the scanty water source. While the myths could be many, the person who wants to grow the crops and want to make money out of the barren lands could find ways to do the same. They should and must understand the fact that nothing could stop them when they strongly decide. Your determination would lead to the situation where you would find the reasons for the growth of the weeds and would also find the best way of removing them completely from the soil so that the soil becomes fertile and could be reused to grow the crops that could be grown with less water.
With the best herbicide you could eliminate the weeds for sure. Now, you could slowly increase the yield of the selected crop and eventually earn more and more money out of the crops that you grow in the soil that was earlier infected by weeds. You could even change the crop as the soil would become fertile thus being able to support the growth of the other seasonal crops which could yield more money. None would dare to try to grow the seasonal crops that are commercial in nature and could give more returns on the money invested.
However, if you employ the right equipment in turning the soil upside down and using natural fertilizers and then get the right sort of weed killers and the best seeds then the results would appear as though some miracle has happen to the fields and hence is the outstanding yield that would fill in your pockets or the bank accounts.