† Our company conducts testing and research to verify the placement of seed and fertilizer, the measurements shown above are approximate and measured center to center of the seed and fertilizer rows.
It is our company's policy to not recommend or endorse specific application rates due to many varying risk factors. Please consider the following factors when using our Seed Hawk seeding system.
Fertilizer rates and type: depending on the type of fertilizer used, damage can occur either through NH3 toxicity, or the effects of salt, or a combination of both. Typically, the risk of seedling damage increases as the rates of fertilizer are increased.
Seed quality and types: crops vary in their ability to tolerate seed‑placed fertilizer, cereals have been found to be able to withstand more than oilseeds, while pulse crops toleration levels fall somewhere in the middle. Seed with poor vigor can suffer more damage from seed‑placed fertilizer than seeds with high vigor, when vigor is unknown seed testing is recommended.
Soil factors: when soil is nearly saturated, the toxic effects of fertilizer are diluted so seeds can germinate and develop with fewer problems. When conditions are very dry or are predicted to be dry during critical growth stages, the toxic effects are stronger and fertilizer rates should be reduced to compensate for this. Extreme wet and dry conditions, heavy residue and the presence of rocks may also lead to erratic seed placement, poor seed-to-soil contact and/or poor seed to fertilizer separation. Finely textured soils including clays or clay-loams tend to also reduce these toxic effects better than coarse or sandy soils because of their ability to hold more water and absorb fertilizer particles. Soils with higher levels of organic matter can also reduce the risks of damage.
Seeding system settings: Improperly adjusting seeding depth, packing pressure, speed and airflow may compromise seed and fertilizer placement as well as the overall quality of the seeding operation. It is highly recommended to consult the operator's manual to ensure you are operating the system as it was intended to be used.