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Since it is unlikely that crop coefficients will be established for landscape plantings, a method to estimate landscape water requirements is proposed. By evaluating three factors that significantly influence water use-species planted, vegetation density, and site microclimate-and assigning numerical values to each, an estimate of a landscape crop coefficient (or landscape coefficient, KL) can be calculated. An estimate of evapotranspirational water loss for landscapes is then the product of the landscape coefficient multiplied by the reference evapotranspiration. This paper presents values for the above three factors and discusses the rationale for each. Examples using the landscape coefficient formula are included, as well as a discussion of special considerations relative to its use.

Comparisons of scale and otolith age readings have been made for haddock from Subareas 4 and 5 of the ICNAF Convention Area. Percentage of disagreeing readings increases with increasing average age of the fish. In cases of disagreement, scale ages are consistently lower than otolith ages for fish above about 7 years of age in Subarea 5, and for practically all ages in Subarea 4. Variation in results from the 2 methods produces differences in relative strengths of year-classes but has little effect on growth rates.

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