Abstract
SummaryComparisons of intermittent misting with ‘pure’ (deionized or rain) and lake (high in Ca(HCO3)2) water on both irrigated and unirrigated Cox’s Orange Pippin trees on M.26 rootstock were made from June to September in 1973–6 to investigate the effects of alleviating water stress on fruit production. Mist treatments were applied only on days of relatively high evaporative demand, and irrigation frequency was determined by soil moisture tensiometers. In seasons of relatively low soil moisture stress the mist effects masked those of irrigation where the treatments were combined, but in seasons of high soil moisture stress and high evaporative demand the mist and irrigation effects combined to give the best yields of prime grade fruit. Both irrigation and misting reduced water stress and their effects were additive in this respect as well as on cropping; this supported the concept that environmental and physiological (cropping) stresses are additive, the reduction of environmental stress permitting the ...
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