In my point of view, nano formulations through mechanism such as targeted delivery or slow/controlled release mechanisms and conditional release, could release their active ingredients in response to environmental triggers and biological demands more precisely-which is the reason they are the future in agriculture!!! Nano-biofertilizers have proven to be more efficient from literature as—they are a conjugate involving combinatorial application of nano- and bio-fertilizers (including an array of soil beneficial microbes) to obtain enhanced and sustainable crop productivity with better addressal of environmental safety.

Please go through some interesting work...

http://agrojournal.rudn.ru/agronomy/article/view/19518

https://iopscience.iop.org/article/10.1088/1757-899X/582/1/012016/meta

https://link.springer.com/chapter/10.1007/978-3-319-97852-9_3

Thanks for your valuable information and sharing of literature.