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, work in this field must be developed. We evaluated the impact of macronutrient omission on nutritional disorders and in vitro growth of B. catenulata . Material and Methods B. catenulata plants were collected in Dec. 2013 in Cachoeira da Rapadura (lat

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macronutrients in leaves affect this mechanism of the alternate bearing cycle of ‘Nadorcott’ mandarin. To address this question, seasonal changes in concentrations of macronutrients, namely, N, P, K, Ca, and Mg, were determined in leaves of “on” and “off

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stages has the potential to increase uptake efficiency and reduce nutrient runoff. Macronutrients, in absolute terms, are required in higher quantities compared with micronutrients only. Therefore, plant response to macronutrient supply is of particular

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)]. Whole plant sampling can be used to look at nutrient partitioning and distribution/redistribution to provide a full picture of nutrient dynamics. The present study was conducted to investigate the seasonal pattern of macronutrient uptake and

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requirements of plant species ( Munguambe et al., 2017 ). There are no reports in the literature on the effect of macronutrient omission on the growth and volatile constituents of L. gracilis . The aim of the present study was to evaluate the effects of

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macronutrient treatments: Ca applied as calcium sulfate (23% Ca and 18% S) at 45 kg⋅ha −1 ; Mg applied as magnesium sulfate (10% Mg and 14% S) at 45 kg⋅ha −1 ; Ca + Mg applied at 22.5 kg⋅ha −1 each; and a grower standard treatment receiving only basal Ca and Mg

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, which can prevent diseases ( Charoensiri et al., 2009 ). To meet market demands, it is essential to observe the nutritional status of plants during cultivation, especially regarding macronutrients, because, when present in adequate concentrations, they

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availability ( Van Raij, 1994 ). The use of acidified NH 4 OAc-EDTA for extraction of plant-available macronutrients is used for a wide variety of soils ( Hons et al., 1990 ), whereas water-soluble nutrients represent the most readily bioavailable chemical form

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Hayes, 2003 ). The physiological effect is dominated by the uptake of the form of the macronutrient N. Uptake of NH 4 + in excess of nitrate NO 3 – results in a net excretion of H + , whereas net H + consumption results from uptake of NO 3 – in

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were randomly assigned as a control or treatment after the system was constructed. Control plants were grown with a complete modified Hoagland’s all-nitrate solution of (macronutrient concentrations in millimoles) 15 N, 1.0 P, 6.0 K, 5.0 Ca, 2.0 Mg, and

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