Since this is kinda morphing into a modern farming thread, and so as not to get too heavy on the old topic, a slight break:
The past 10 years, us farmers have started adding sulfur to our fertilizer. Takes about 10-15 lbs per acre to make happy corn.
Years ago, no one ever had to do that. We got enough sulfur in the rain - acid rain. Some of the pollutants in the air were actually good for the crops.
Times change, and we cleaned up the air - a good thing - bit now we have to spend money on extra fertilizer. Seems grass crops especially need a little bit of sulfur, but now they see an improvement in soybean crops as well.
Seems ironic, we clean up the air, and then need to add more fertilizer to the crops.
Also with all the wet weather around me, a lot of farm acres have not been planted. They are talking maybe 4 million acres of good farmland so wet all spring it won't get planted!
One of the hottest topics on the farm press and farm forums is cover crops. If it ever does dry out later in summer, they want to plant cover crops to hold the soil, save the fertilizer in it, and improve the soil.
Lot of intrest in that, by the big time farmers.
Paul