Weegy: Nitrogen application rate did not affect total herbage DM, DOM or N yields significantly in years 4 and 5 though there were significant increases from spring N in the dry year 2 (297 mm rainfall from April to September). Figure 1 shows herbage DM. [ yields each year for all treatments and Table 1 shows mean annual 5-year data.
Annual clover DM was not significantly affected by N application in years 4 and 5, though it was reduced by spring N in years 1 and 2 and by autumn N in year 3. However, over the 5 years mean annual Clover DM was reduced by 17.6, 17.4 and 11.7 kg DM per kg N at the 25, 50 and 75 kg ha-1 spring N rates, respectively, by 8.8, 13.4 and 2.4 kg DM for equivalent autumn N rates and for these rates applied in both spring and autumn, 18.0, 11.5 and 7.5 kg DM; decreases from the spring N plus autumn N combinations were always greater with 'high-low' spring N plus autumn N combinations than 'low-high'. ] (More)

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