When Earth and Mars are at their theoretically closest point of 54.6 million km, it would take a signal from Earth about 3 minutes to make the journey, and then another 3 minutes for the signals to get back to Earth.
Switchgrass is a hardy, deep-rooted, perennial rhizomatous grass that begins growth in late spring. It can grow up to 2.7 m high, but is typically shorter than big bluestem grass or indiangrass. The leaves are 30â90 cm long, with a prominent midrib.
Conservation Uses Switchgrass, a native perennial, warm-season, sod-forming grass, is a major component of the tall grass vegetation which once dominated the prairies of the central and eastern United States. It can be used singly or in mixtures for livestock forage onrangeland, pastureland, and hayland.escription Switchgrass grows 3 to 5 feet in height. It can be distinguished from other native grasses by the dense patch of hairs at the point where the blade attaches to the sheath, even as a young plant. The stem is round and usually has a reddish tint. The seedhead (panicle) is spreading and open.