General precautions for nitrogen fertilizer use including, organic and mineral fertilizers, should be distributed evenly over the soil with specialized equipment and plowed under immediately after spraying. Fresh manure application is not permitted. The solid manure is stored under normal conditions at least 6 months, while liquid manure should be stored for at least 4 months before application
To avoid the risk of excess nitrate amount in plants and soil, the quantity of nitrogen compounds imported from organic fertilizers for all crops must not exceed 17 kg per hectare during the year. The rates of nitrogen fertilization are based on agrochemical soil analysis.