Let's start with hybrids. These aren't necessarily GMOs, in that they are bred in the field to make certain traits. There are those which are drought resistant, heat resistant, flood resistant, short growing season, long growing season, and everything in between. As farmers, we don't just pick one variety to plant in all of our fields, we diversify our crop based on soil type, drainage, micro-nutrient levels, presence of irrigation, equipment, tillage style, and a host of other factors. We try to balance our cropping portfolio so that no matter what the growing conditions, we can have a good crop.
Now we can talk tillage practices. Farmers have a huge variety of field implements to use when tilling their fields. Some farmers are strictly no-till, which is planting into ground that hasn't been cultivated in any way. This is good for soil erosion because the ground is always covered with some type of cover. Some farmers use plows or rippers to break hard pans in the soil and to inject manure for a natural fertilizer. Vertical tillage is somewhere in between, helping to create soil uniformity, thus better space for roots to grow. We try to minimize our passes over the field by doing multiple things at once, making us more efficient on fuel, and less likely to cause compaction.
We use soil testing to figure out our nutrient levels to make sure that we put the right fertilizers in the right places. We balance our soil and water pH levels to make the growing conditions suitable for the plants. We use crop rotation and cover crops to improve the soil content, minimize weeds in the off seasons, and increase the organic matter.
Farm equipment now allows us to collect data and use GPS to practice precision farming. We can map a field based on yield, and soil type to plant different varieties in places that respond differently within the same field. We can manage our fertilizers that way too, so we are using less and growing more. Even the number of seeds we plant per acre is adjusted based on this mapping, giving each seed a better chance to thrive, and only planting as many seeds as the ground can adequately provide for throughout the growing season.
Even more basic farming tools are being honed every time we go out in the field. Did you know that the soil temperature at the time of planting greatly effects the ability for the seed to take up nutrients? By monitoring our soil temperatures, we can give the plants the best start that we can, and utilize the fertilizer that is already in the ground. In addition, we can adjust our planting equipment to make sure our planting depths are consistent, so one plant doesn't dominate another.
GMOs are part of the farmer's toolbox, but they don't make up for cutting corners in crop production. Not every farm is using each tool, but each farm is trying to put together the best mix of tools to utilize the land at the highest potential.
