Evaluation of Three Wetting Agents as Soil Additives for Improving Crop Yield and Nutrient Availability1
- R. P. Wolkowski,
- K. A. Kelling and
- E. S. Oplinger2
The effect of soil applications of WEX, Basic H, and Amway Spray Adjuvant was evaluated using corn (Zea mays L.), soybean [Glycine max (L.) Merr.], or potato (Solanum tuberosum L.) as test crops at three Wisconsin locations. Each wetting agent is a nonionic surfactant, and claims or has claimed to improve crop yield, quality, and nutrient availability. WEX was evaluated at recommended fertilization levels. Amway and Basic H, in the corn experiments, were evaluated at varying levels of applied N. Basic H was evaluated on potatoes at 30, 50, and 100% of the entire recommended fertilization program. Although crop yield was increased by fertilization in all cases, no yield improvements were observed from the use of any wetting agent at any fertilizer rate. No differences in nutrient availability as evidenced by foliar nutrient content of N, P, and K or crop protein levels were observed in association with the application of a wetting agent.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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