As I wrote above, in this field experiment, we tested whether the corn yield would increase if the seeding rate was increased in the high-productivity zone and decreased in the low-productivity zone.
To this end, two additional controls were added to each corn field:
- For the first control, we decreased the seeding rate in the high-productivity zone and increased it in the low-productivity zone.
- For the second, the medium seeding rate was used in all productivity zones.
The medium corn seeding rate in this experiment was the agricultural holding's standard rate: 74,000 - 78,000 grains per hectare. The other rates were selected based on the corn hybrid: the low rate was 65,000-69,000 per hectare, and the high rate was 80,000-87,000 per hectare.
I'd like to emphasize that, in order to receive objective results for the experiment, it was important to apply both controls in the same field.
If you compare test strips from several fields, the result is unreliable due to different planting dates and applications of plant protection products, growth regulators, etc.