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It is crucially important to farmers that the herbicides they

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It is crucially important to farmers that the herbicides they  [#permalink]

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It is crucially important to farmers that the herbicides they use to control weeds not damage their crops. One very effective herbicide is safe for corn but lethal to soybeans. To maintain the nutrients in the soil, soybeans and corn are frequently sown in a field in alternate years. Therefore, in such fields, the herbicide can safely be used on the corn, since the two crops are not sown together in the same field.

Which of the following, if true, most seriously weakens the argument?

(a) The herbicide has not been shown to harm insects, birds, or other animals that come in contact with it.
(b) Scientists have so far failed in their attempts to breed soybeans that are resistant to the herbicide.
(c) Some of the herbicide persists as a residue in the soil for over a year.
(d) To be effective, the herbicide must be applied early in the growing season of the corn.
(e) Soybean crops do not require the application of herbicides to the same extent as do corn crops.

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Re: It is crucially important to farmers that the herbicides they  [#permalink]

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New post 09 Aug 2018, 01:07
PeepalTree wrote:
It is crucially important to farmers that the herbicides they use to control weeds not damage their crops. One very effective herbicide is safe for corn but lethal to soybeans. To maintain the nutrients in the soil, soybeans and corn are frequently sown in a field in alternate years. Therefore, in such fields, the herbicide can safely be used on the corn, since the two crops are not sown together in the same field.

Which of the following, if true, most seriously weakens the argument?

(a) The herbicide has not been shown to harm insects, birds, or other animals that come in contact with it.
(b) Scientists have so far failed in their attempts to breed soybeans that are resistant to the herbicide.
(c) Some of the herbicide persists as a residue in the soil for over a year.
(d) To be effective, the herbicide must be applied early in the growing season of the corn.
(e) Soybean crops do not require the application of herbicides to the same extent as do corn crops.


What can damage soybeans even though soybeans and corn are not sown together? For example, traces of herbicides. Lets have a look

A. Insects, birds and animals are out of scope
B. Soybenas may not be resistant to herbice if soybeans are sown in alternate year
C. Correct. In line with our prethinking
D.Talks about effectivness, not about soybeans
E. Extent of application doesn't matter. Actually strenghthens the argument
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Re: It is crucially important to farmers that the herbicides they &nbs [#permalink] 09 Aug 2018, 01:07
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