No-till pasture renovation can increase the quality and forage yield of
underproductive pastures. Decreased erosion, lower costs, and less lost
grazing time are advantages of no-till renovation compared to conventional
renovation. Unwanted vegetation is first controlled with herbicides to decrease
competition for introduced orchardgrass. Two field trials were conducted using
a split-plot design to compare three seeding methods and two herbicides. An
Aerway no-till drill, a Tye double disk drill, and broadcast followed by harrowing
were the seeding methods. Paraquat and glyphosate were used to determine
herbicide effect on vegetation control.
Orchardgrass did not adequately survive at either trial site. However,
where some orchardgrass did survive, vegetation control was more important
than seeding method. Competition from annual grasses, many germinating
after herbicides were applied, was the reason for renovation failure. Herbicide
and initial growth for best control.
Yield was doubled in the first harvest by the addition of fertilizer. Early
spring forage production from poor pastures is usually more than adequate, so
the increase from fertilizer is of marginal value unless it is stored for later use.
Yield increase did not carry over to the second harvest when it could be better
utilized. Later application dates would extend yield increases from certain
species if water is available. / Graduation date: 1994
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/35662 |
| Date | 17 June 1993 |
| Creators | Fitzsimmons, James P. |
| Contributors | Burrill, Larry |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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