Nitrogen is available to plants as either ammonium (NH 4 + -N) or nitrate (NO 3 - -N). Animal manures and other organic wastes can be important sources of N for plant growth. The amount of N supplied by manure will vary with the type of livestock, handling, rate applied, and method of application.
Danielle Fishel, who played Topanga on the hit '90s series Boy Meets World, married her long-time boyfriend Tim Belusko in Los Angeles over the weekend. Travel Deals.
Rowan Blanchard, left, who plays Riley, Cory and Topanga's daughter, and Sabrina Carpenter, who plays her friend, Maya, in Girl Meets World. Rowan Blanchard, left, who plays Riley, Cory and Topanga's daughter, and Sabrina Carpenter, who plays her friend, Maya, in Girl Meets World. (Katie Falkenberg / Los Angeles Times) Michael Jacobs, the creator of the original series that launched in 1993 and is back at the helm, won't speculate on what-ifs.