Absolutely nothing.
Magnets do not affect plants in any way
Your local feedstore or your local large animal veterinarian.
One is good enough.
No they are very painless solutions to make sure that no metal every passes past the reticulo-rumen.
Yes. Most cow magnets can weigh around a pound or two each, but often never exceed three.
Cows don't have "built in magnets." Magnets are inserted down the throat of a cow as a way to prevent her from getting hardware disease from eating too much scrap metal like nails and wire. The magnet in a cow works exactly the same as any "normal" magnet does.
nitrogen in soil is taken by the plants when that are growing. As cow eat plants these nitrogen present in the plants go inside cow body and converted into glucose for giving cow the energy to move etc...
Some cows have magnets inside their stomachs! The magnets attract any metal that the cow might accidently eat, which would harm or kill the cow if it passed through the digestive system. A cow can keep a magnet inside the stomach for it's entire life without harm.
cow is producer
A Herbivore.
Yes?
Energy for the cow initially comes from the plants she eats and digests.