The growth of ginger can be classified into three distinct periods: a phase of active vegetative growth (90 to 120 days after planting), a phase of slow vegetative growth (120 to 180 days after planting), and a phase of senescence (180 days to harvest). The pattern of rhizome development also followed the same trend except that the development of rhizome continued up to harvest (Johnson, 1978). According to Johnson, the total uptake of N, P, and K progressively increased with advancing periods of crop growth, and the uptake by the leaf and pseudostem progressively increased up to 180 days after planting and decreased thereafter. However, the uptake by rhizome steadily increased till harvest. He also standardized the period between 90 and 120 days after planting as the ideal time for leaf analysis and recommended the 5th to 12th leaves for foliar diagnosis.
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