What should be noted when applying urea as a foliar fertilizer?
What should be noted when applying urea as a foliar fertilizer? Please explain. When applying urea as a foliar fertilizer, note the following: do not spray in extremely hot weather or before rain, to avoid burning the seedlings or losing fertilizer nutrients. The best time to spray is in the early morning or afternoon each day, and spray again 7~10 days after the first application. For cereal crops...
What should be noted when applying urea as a foliar fertilizer? Please explain.
When applying urea as a foliar fertilizer, note the following:
Do not spray in extremely hot weather or before rain, to avoid burning the seedlings or losing fertilizer nutrients. The best time to spray is in the early morning or afternoon each day, and spray again 7~10 days after the first application.
When spraying cereal crops or crops with smooth leaves, add 0.1% adhesive (such as laundry detergent or dish soap). Otherwise, the effect will be poor.
The biuret content of the urea used for spraying must not exceed 0.5%, otherwise it can easily damage the leaves.
Different crop types require different concentrations of urea solution for spraying. Generally, cereal crops require a spray concentration of 1.5%~2%, and the concentration should be even lower when spraying during the flowering period. For leafy vegetables and cucumbers, the spray concentration is 1%~1.5%, and for tomatoes 0.3% is suitable. For fruit trees such as apples, pears and grapes, 0.5% is suitable.
Click to learn more foliar fertilizer application methods
Click to learn more fertilizer application methods