RESPONSE OF COTTON TO NPK FERTILIZATION - THE GREEK EXPERIENCE
Mar 10, 2017

Agronomy & physiology WCRC Agro-phyisio-Med-MiddleEast WCRC1
Abstract                                                                         Back to Table of contents

Cotton is an economically important crop in Greece and experiments to determine the response of cotton to rates of fertilizers have always been an important part of research. The first experiments started almost 40 years ago and low rates of NPK showed a slight increase in cotton yield due to N and a lack of response to P and K fertilization.  The aim of this paper is to summarize the progress of more recent experiments.

Fifty-six experiments were conducted in eight cotton producing areas, for 12 successive years, testing five rates of N (0, 50, 100, 150, 200 Kg N per ha) and two rates of P (0,100 Kg P per ha) and K (0, 100 Kg K per ha). Data showed that N affected seed cotton yield, even at the very low application rate, while the effect of P was limited and that of K negligible. The increase in cotton yield as a result of N fertilization was related to the number of bolls and the boll weight. The maturity of cotton plants was related to N fertilization. Among the cotton fiber characteristics, only lint percentage was affected by fertilization.

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