NITROGEN FERTILIZER TRIALS ON PASTURES

Authors

  • M.B. O'Connor
  • P.E.H. Gregg

DOI:

https://doi.org/10.33584/jnzg.1971.33.1312

Abstract

On twenty-four sites throughout the country the effect of time and rate of applied nitrogen on "out-of-season" pasture production was studied over two seasons (1969-70 and 1970-71). Responses to spring-applied nitrogen wem more reliable than to autumn-applied. Spring responses varied from slight (2-7 kg DM/kg N) in the Waik& o, Bay of Plenty and parts of Canterbury to very good (10-20 kg DM/kg N) in Taranati, Dannevirke, southern Wairarapa, northern South Island, Westland and parts of Southland. When yield responses are considered as a substitute for hay, or other supplementary feedstuffs, payable results occur above about 7 kg DM/kg N. Factors such as time of application, soil type, pasture composition and amount of nitrogen in the soil affected the response to applied nitrogen.

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Published

1971-01-01

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Section

Articles

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