How IoT can make agriculture more profitable and crop healthier at every step

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According to the UN projections, world population will rise from 6.8 billion today to 9.1 billion in 2050 that signifies food production has to be raised to feed the one-third more mouths. And, the agriculture industry is accountable for fulfilling humans' need for food, energy, and shelter (To a great extent). Furthermore, the agriculture industry composes less than 5 percent of the combined GDPs of the world. But, there is one more distressing fact revealed by Bureau of Labor Statistics, employment of agricultural workers is projected to decline 3 percent from 2012 to 2022. Why is this employment supposed to reduce?