A comparison of three nitrogen response models for cauliflower

A.P. Everaarts, W. van den Berg

    Research output: Contribution to journalArticleAcademicpeer-review

    11 Citations (Scopus)

    Abstract

    A quadratic, a linear exponential and a linear plateau response model were compared in an analysis of the reaction of cauliflower yield to field applied nitrogen. For the pooled experiments the degree of fit with all three models considerably improved when the amount of mineral nitrogen in the soil layer 0¿30 cm or 0¿60 cm at planting was taken into account. This indicates that the crop can utilize the mineral nitrogen in the soil layer 0¿60 cm at planting. With the linear exponential model, too high optima were estimated for the pooled experiments and no optima could be estimated in five out of the seven individual experiments. Application of the quadratic response model resulted in unrealistically high optimum fertilizer rates for both the pooled experiments and individual experiments. Optimum fertilizer rates in the individual experiments were best estimated using the linear plateau model. Excluding one experiment, a significant linear relationship was found between optimum fertilizer application and the amount of mineral nitrogen in the soil layer 0¿60 cm at planting
    Original languageEnglish
    Pages (from-to)171-179
    JournalActa Horticulturae
    Volume1996
    Issue number428
    DOIs
    Publication statusPublished - 1996

    Keywords

    • brassica oleracea var. botrytis
    • cauliflowers
    • decision making
    • linear programming
    • management
    • nitrogen fertilizers
    • operations research
    • simulation
    • work flow

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