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Maybe you can choose to open with a mention of the advance in agriculture that seems most interesting to you.
- Satellites are now used take infrared and multi-spectrum photos of fields to help identify mineral levels in the soil. That's pretty neat.
- New seeds have been engineered to increase yield and to fight off insects and disease. That's is a bit controversial.
- Animal-drawn plows have been replaced by much more time-efficient farming equipment.
You might begin by comparing and contrasting agriculture as it was recently practiced in a developing country (such as China) with agriculture as it is practiced in that country today. It was not too long ago that China was an economic basket case; the same is true of India. Certainly the introduction of new technology into agriculture in those economies has benefitted the agricultural industries there.
The Green Revolution back in the '60s was extremely important. It used technology to develop new strains of rice and other foods that would have improved yields. Today, the use of genetically modified organisms hold great promise as well.
Certainly talking about how yields have increased due to hybrids developed through technology and supported through appropriate use of chemicals as measured and determined by technological applications. Tractors are guided with GPS systems and the amount of chemicals applied to areas of the fields are adjusted for moisture and chemical composition of the soil.
You could talk about the new varieties of plants being developed and distributed to provide higher yields and more nutrition for the masses of India, Africa, and South America. Look up Norman Borlaug! Nobel Peace Prize winner...
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