IX. Hamilton

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Abstract
Pasture growth rates from 1954 to 1970 are presented for a site at Rukuhia Soil Research Station near Hamilton in the Waikato. The pasture consisted mainly of perennial ryegrass (Lolium perenne) and white clover (Trifolium repens). Two pasture areas were used and each one was cut alternately for yield measurements and then grazed for a period. Cuts were taken at 2-weekly intervals and five time replicates were cut at 3- to 4-day intervals. The mean yield and standard error of individual samples are given for standard dates at 14-day intervals. The growth pattern had a dominant peak growth rate in October and a secondary peak in December. The mean average annual yield was 10220 kg DM/ha of which 13% was produced during the winter months of June, July, and August, 44% during spring, 25% during summer, and 18% during autumn. General climate data, mean monthly rainfall, and temperature data during the period of pasture measurements are given.

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