Update for 5:40 p.m. EDT: The "ring of fire" annular solar eclipse of Oct. 2 amazed skywatchers across the southern Pacific and South America. See stunning photos and videos in our full story. On Oct.

The finding effectively paves the way for continued use of atrazine, a widely used herbicide that has been linked to birth defects and cancer in humans. By Hiroko Tabuchi The rules were established by ...

Tillage can provide key ecosystem services for non-chemical management of cover crops and weeds, pests, and soilborne pathogens, without undermining soil organic carbon stocks or greenhouse gas ...