Nanomaterials added to soil via fertilizers and treated sewage waste used to fertilize fields could threaten soil health necessary to keep land productive.

http://www.fao.org/docrep/017/aq378e/aq378e.pdf

http://dx.doi.org/10.1080/10408436.2012.732545

Dear Colleagues, Thank you so much 

Research topic, but the standard required in this area is low. We have mentioned in this article.

https://www.researchgate.net/publication/257630034_Effect_of_silver_nanoparticles_on_concentration_of_silver_heavy_element_and_growth_indexes_in_cucumber_Cucumis_sativus_L_Negeen

Article Effect of silver nanoparticles on concentration of silver he...

Dear Morteza Ranjbar ,

Thank you