Morphological differences between seedlings of blue grama and crested wheatgrass show why plantings of blue grama fail while those of crested wheatgrass succeed. When both species are planted at a depth of 18 mm, crested wheatgrass initiates adventitious roots at the depth of planting and blue grama initiates adventitious roots at an average of only 2 mm below the soil surface. Adventitious roots of blue grama usually die in the harsh environment at this shallow depth.
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Journal of Range Management