David Scott
Abstract:
A nineteen year trial at Lake Tekapo compared the longer term trends of over-drilling legume and grasses into either previous undeveloped tussock country or following a previouslegume phase. Tall oat grass(from summersowing) and cocksfoot (from spring sowing) were the mostsuccessful of the sown grasses. They remained a low proportion of the swards but greater with prior herbicide treatment, sown with an experimental drill giving partial cultivation and with starter nitrogen fertiliser. Perennial lupin became the main species in the previous undeveloped block and was increasing in the previous developed block. The analysis stage considered the inclusion of covariates for contoured location responses as well astreatment effectsin such multi-plot field trials on uneven ground.
Keywords: New Zealand, rangeland, pasture development, perennial lupin, cocksfoot, tall oat grass, experimental design
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