why the concentration of nitrate ion in the soil had decreased after the farmer grew maize plants in the field?​

to grow the maize plant take nitrate ion (it is essential for the growth of the plant [maize] to grow it takes the nitrate ion basically nitrogen from the soil)

because the maize plant will take in the nitrate and use it to make proteins for growth.

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

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emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.