#1) Orchardgrass is well fertilized and irrigated. After being harvested with a low set cutter bar, in August after a 7 weeks recovery growth there was a complete loss of orchardgrass. Orchardgrass harvested with a higher cutter bar on the same date with 3-5 weeks recovery showed no stand reduction. Explain the management implications.
#2) A large number of orchardgrass clones are planted 30" apart in 30" spaced rows. The clones measured 12" in diameter. All are mowed in the same manner: moving in an easterly direction such that shoots leaning toward the mower (west side of the clone) would be cut lower than those on the opposite side. Two weeks later, shoots in the west side of all the clones were completely dessicated, as were those in the center of the clone. However, shoots on the perimeter of the east side were normal, with about 6 inches of recovery growth. What factors are in play in this situation?