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Most major improvements in farm production have come from increasing the number of edible species to be used as crops.

Wind can equal or exceed water as an erosive force in a dry climate on flat land.

Which is not true of genetic engineering?

Deforestation of rainforest leaves very nutrient poor acidic soil for agriculture and __________ is added to counteract the acidity and help hold nutrients

Raising cows on pasture grass rather than grain reduces erosion by 1/2 and nitrogen runoff by 2/3.

A gene from a strain of Agrobacterium resistant to glyphosate has been transferred into soybeans. What is the purpose of this transfer?

Only 0.6% of the processed food in the U.S. contains GMO ingredients.

Which is not true of desertification?

Organic matter that has decayed to a point of stability, and stores water and nutrients.

Arable land is evenly distributed across the world.