NITROGEN AND AMYLASE IN SOME NEW ZEALAND BARLEYS

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Abstract
The investigation is concerned with samples of Kenla and Research barleys grown in north Canterbury during the four seasons 1952-53 to 1955-56, nitrogen, total β-amylase and free β-amylase having been determined on the samples. Significant differences were found between districts for total nitrogen, but a consideration of soil types gave little information of value; the lowest analytical figures were obtained in the wettest season. Kenia and Research did not differ consistently in nitrogen content, but Research had the higher total amylase, particularly in the drier seasons. It is suggested that a high ratio of enzyme activity (as assessed by total amylase content) to nitrogen is characteristic of barleys likely to modify well.