Sleper and colleagues at the University of Missouri developed HiMag in a cooperative effort that began in 1983.
As part of the HiMag collaboration, Shewmaker and Mayland scrutinized mineral levels of hundreds of candidate forage plants.
So far, HiMag has been tested not only in Idaho and Missouri, but also in Utah, Texas, Arkansas, Georgia, Virginia, and New York, as well as in Canada.
When given a choice among HiMag and seven other tall fescues, HiMag garnered a respectable third-place.
Three, 0.8-ha pastures of each tall fescue entry (K31 E+, HiMag E-, and HiMag NTE) were established at the Southwest Missouri Research and Education Center near Mt.
The treatments in this experiment were three tall rescue entries: K31 E+, HiMag E-, and HiMag NTE and four monthly sampling dates (mid-December, January, February, and March).
Herbage mass was greatest for K31 E+ (2370 kg [ha.sup.-1]) while HiMag NTE and HiMag E- were equal to each other but [approximately equal to] 20% lower than K31 E+ (Fig.
HiMag E- and HiMag NTE contained no ergovaline, while K31 E+ had substantial concentrations of ergovaline (Fig.
HiMag forage yields are similar to Missouri-96 and Kentucky-31, and it grows well on both calcareous alkaline and acid soils (Shewmaker et al., 1997; Wilkinson et al., 1997).
HiMag was developed for the purpose of minimizing the effects of grass tetany in cattle (Bos taurus) and sheep (Ovis aries).
When HiMag was compared with `Au Triumph' (Pedersen et al., 1983), Kentucky-31, `Martin', and `Mozark', it was found to have 22% more Mg, 18.5% more Ca, and 9% more P (Crawford et al., 1998).
Small quantities (100 g) of seed of HiMag are available to breeders and geneticists.