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This article in SSSAJ

  1. Vol. 33 No. 5, p. 718-721
     
    Received: Sept 27, 1967
    Published: Sept, 1969


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doi:10.2136/sssaj1969.03615995003300050028x

Nutrient Interaction Effects on Sucrose Yield of Sugar Beets (Beta vulgaris) on a Calcareous Soil1

  1. H. D. Fuehring,
  2. M. A. Hashimi,
  3. K. S. Haddad,
  4. K. K. Hussieni and
  5. M. U. Makhdoom2

Abstract

Abstract

Thirteen multivariable irrigated field experiments on a calcareous clay soil indicated a high requirement for N, Na, and P for yield levels up to 25.8 mtons of sucrose per ha. Levels of applied Cl, S, Zn, and B needed to be kept low. Partial third-order regression equations were determined from the central composite, rotatable designs used. Two-way and three-way interactions had considerable effect often being considerably more important than the main effects of individual nutrients. Negative interactions of N with S and Zn were reinforced at high Na levels by negative N-Na-S and N-Na-Zn three-way interactions. Negative interactions of Na with S, Cl, and Mg, along with the above mentioned three-way interactions, accounted for most of the positive Na effect. The necessity for high levels of N, P, and Na along with low levels of S and Cl raises the question of what form of Na to apply and how to avoid excess S and Cl. Various interactions affecting the response to Zn, B, K, and Mg require further study.

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