1-Chemical fertilizers replace inorganic soil nutrients. True or False 2-DDT is

Question

1-Chemical fertilizers replace inorganic soil nutrients.      True or False

2-DDT is deadly to humans and Insects.         True or False

3-Shifting agriculture often employs monoculture farming techniques.             True or False

4-About 60% of pesticides used in the US are herbicides.      True or False

5-Brazil grows the most genetically modified (GM) crops.       True or False

6-The average person in a North American home uses 69% of

domestic water for drinking and cooking.       True or False

7-Public attitudes are a major cause of water loss.    True or False

8-One or more chemicals were found by the USGS in 80% of sampled

streams.           True or False

Explanation / Answer

1. True. Chemical fertilizers are enriched with inorganic constituents like Nitrogen, Phosphorous. Thus, they can replace inorganic soil nutrients at places where the soils are deficient in these nutrients.

2. True. Its true that DDT is deadly for both humans and insects. For humans, DDT may cause cancer and toxicity. It also kills insects.

3. False.In shifting agriculture, a crop is grown on a certain plot of land and is abandoned after the crop has grown fully so that the land can get back its natural nutrients. ANother crop is sown on another piece of land and then this land is again abandoned for the purpose of restoration of its natural habitat. Meanwhile, other crops are grown. Monoculture farmimg techniques imply cultivation of a single crop.So, shifting agriculture and monoculture farming techniques does not go hand in hand.

4. False. It is more than that. It was 76 percent in 2008 and is gradually rising.

5. False. USA comes top in the list. Brazil comes in the second place.

7. True

8. True

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