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STUDIES ON THE MINERAL NUTRITION OF TEA: II – NITROGEN

K. C. WILLSON
Plant and Soil
Vol. 42, No. 3 (JUNE 1975), pp. 501-516
Published by: Springer
Stable URL: http://www.jstor.org/stable/42946919
Page Count: 16
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STUDIES ON THE MINERAL NUTRITION OF TEA: II – NITROGEN
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Abstract

The response of tea in terms of additional crop yield from a given increase of nitrogen application is more important than the actual crop level. Responses to nitrogen on tea throughout the world are of the same order within a wide range. Results show that the response falls off as nitrogen-applicationlevels rise which is often a consequence of limited availability of other nutrients. The acidifying effect of some nitrogen fertilisers intensifies the problem by reducing the availability of base nutrients. Leaf analysis data indicate that nitrogen deficiency is not uncommon. It is important to determine the conditions under which alleviation of deficiencies of other nutrients will improve the response to higher levels of application of nitrogen.

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