fertilizing a corn field

agriculture artificial bean beans biology chemical chemistry combine compost crop crops cultivated cultivation dirt environment environmental environmentally farmland fertile fertilization fertilize fertilizer fertilizing field food genetically grain granules green ground growing growth harvest healthy horticulture humus industry leaf leaves machine machinery manure mineral mix natural nature nitrogen nutrient nutrients nutrition organic pellets phosphate phosphorus plant plants pollution potassium produce protein raw ripe row science seed soil soy soya soybean sprayer spraying stem synthetic technology toxic tractor transport treatment vegetable vehicle