My Opinion Is Not Worth The Money
I sprayed 3 fields of annual ryegrass with 15 10 5 foliar fertizer to exact specs on the label. Field 1 had been fertilized at planting and not grazed. Field 2 had been fertilized at planting and grazed. Field 3 was not fertilized at planting but was lightly grazed. I also had a field that was fertilized at planting and not sprayed or grazed, and a field that was fertilized at planting and not sprayed but grazed.
I realize this is not pure science and just my observation and opinion, but I could not find any unbiased or scientific information, so I did my own quick study.
After one month, the foliar fertilizer sprayed fields are behind the un-sprayed fields. All the fields are next to each other; same rain, same soils. Field 3 looks a little better, but could be just the rain.
My opinion, foliar fertilizer is a waste of money for annual ryegrass.