Feb2TueFebruary 2, 2016
Wheat has great potential to benefit from foliar feeding. Studies indicate positive response to foliar feeding at various stages of wheat growth. The obvious choice for a producer to use this method of fertilization is when they are already making crop protection applications to the field. Often these applications correspond with the breaking of dormancy (Feekes 5-6) or to the emergence of the flag leaf or booting (Feekes 9-10).
Foliar feeding wheat may best be accomplished with a complete fertilizer. When looking at the benefits of foliar feeding wheat, there are multiple studies looking at different nutrients, including N, P, K, and Micronutrients:
- Nitrogen –N significantly increased grain protein of HRWW and HRSW, with the post-anthesis application stage having the highest protein (2). Oklahoma State University authorities have said that N applications applied at or soon after flag leaf have a 33% chance of increasing yield, yet many questions still need answered including the timing and source of the N (9). While it is known that urea-triazone (active ingredient in N-rage and SRN) is Approx. 4x more stable than 100 urea (foliar).
- Phosphorus – Research shows foliar application of P at Feekes physiological growth stage 7 (two nodes detectable) generally increased grain yields and P uptake versus no foliar P. Use efficiency was higher when P was applied at Feekes 10.54 (flowering completed). Results suggested that low rates of foliar applied P might correct mid-season P deficiency in winter wheat, and that might result in higher P use efficiencies when compared to soil applications.
- Potassium - Simply having higher levels of K in wheat produce more dry matter and yield. Higher levels of K in the plant also enhance N and P uptake, especially under water stress (either too much or too little water).
- Micronutrients – Micronutrients, including Fe, Mn, Zn, Cu, and B are important to wheat crops and are a good fit for foliar application, often increasing yield and protein content of wheat. Zn and B have been identified as two nutrients with exceptional yield boosting possibilities.
NACHURS products which are suitable for foliar applications in combination with many crop protection chemicals:
- Rhyzo-Link 9-15-3, Rhyzo-Link 3-10-13, NACHURS imPulse, NACHURS Triple Option, NACHURS Finish Line, NACHURS SRN, NACHURS N-Rage Max (always perform compatibility test prior to application).
NACHURS products which may be combined with UAN (in proper ratio):
- NACHURS Finish Line, NACHURS CornGrow or NACHURS SoyGrow, NACHURS K-flex, NACHURS K-fuel, Rhyzo-link 0-0-15, NACHURS SRN, NACHURS N-Rage Max. NACHURS 100% EDTA Micronutrients may be added to any formulation.
-Wayne Becker, Southern US Sales Agronomist