An investigation to study the biochemical changes in maize under continuous application of fertilizers and manures was undertaken with ten treatments at Tamil Nadu Agricultural University, Coimbatore. The NPK + FYM treatment resulted in producing maize grain of better quality. The non-addition of any fertilizer, elimination of S and K significantly reduced the grain quality. No appreciable variation could be observed with different levels of NPK in the quality constituents such as starches, protein, carbohydrates, sugars and phenols.
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