Effect of sowing depth and post-sowing compaction on the estabishment of tall fescue varieties

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Abstract
Results are presented of a field trial on the establishment of two tall fescue varieties, Festuca arundinacea Schreb. S170 and ‘Grasslands 4710’, and perennial ryegrass, Lolium pcrenne L. ‘Grasslands Ruanui’, at four sowing depths (0, 12.5, 25, and 37.5 mm), with or without post-sowing compaction. Establishment rates of both tall fescue varieties were approximately 50% slower than those of ryegrass. Establishment of all varieties was best at a sowing depth of 12.5 mm and worst at 0 and 37.5 mm. Post-sowing compaction reduced growth of all varieties at all depths except surface sowings, G4710 being less affected than the other varieties. The result, are discussed in terms of the interactions of energy reserves and growth rates of the seedlings, moisture supply, and soil crust strength.