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Rye sown in the fall and plowed into the soil in early

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 26 Dec 2011, 12:21
D for me

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 06 Jul 2013, 09:29
A) consider that there might be minor, quick-growing crops that do mature in forty-five days or less

The conclusion clearly refers to major and minor is irrelevant or rather out of scope.

(B) identify any alternative method of weed control that could be used instead of the method it rejects

Synthetic Herbicides

(C) distinguish among the various kinds of synthetic herbicides

Who cares?

(D) allow for the possibility of combining the two weed-control methods it mentions

Crux of the argument as it is not evaluated this and it could be an option

(E) allow for the possibility that plants other than rye, handled the same way, might have the same effect.

Other than rye – out of scope.

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 09 Jul 2013, 00:57
perfectstranger wrote:
Rye sown in the fall and plowed into the soil in early spring leaves a residue that Is highly effective at controlling broad-leaved weeds, but unfortunately for only about forty-five days. No major agricultural crop matures from seed in as little as forty-five days. Synthetic herbicides, on the other hand, although not any longer-lasting, can be reapplied as the crop grows. Clearly, therefore, for major agricultural crops, plowing rye into the soil can play no part in effective weed control.
The argument is most vulnerable to the objection that it fails to

(A) consider that there might be minor, quick-growing crops that do mature in forty-five days or less
(B) identify any alternative method of weed control that could be used instead of the method it rejects
(C) distinguish among the various kinds of synthetic herbicides
(D) allow for the possibility of combining the two weed-control methods it mentions
(E) allow for the possibility that plants other than rye, handled the same way, might have the same effect.


fairly unassuming question from the standards of the new GMAT.. also allow for used twice mcan easily be used to take those options more seriously and make the right choice between D and E that means

A, B C Out of Scope
D Correct
E. equally out of scope

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 27 Jul 2014, 16:14
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 24 Sep 2014, 04:31
Author concludes that sowing RYE is not helpful in removing weeds. i we prove that anyhow RYE can be helpful in any other was as presented in choice E then it weakens the argument
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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 25 Sep 2015, 02:10
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 03 Oct 2016, 23:07
D for me. It weakens the author conclusion that Rye is ineffective by stating it might have some effect.

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 17 Jul 2017, 20:54
hello, what is the most effective method and what are steps of the method to solve such kind of question?

It is because I completely get lost while finding the answer.

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 19 Jul 2017, 05:27
Isnt this a "find a flaw" argument more than a "weaken" argument ?

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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 21 Jul 2017, 18:58
chesstitans wrote:
hello, what is the most effective method and what are steps of the method to solve such kind of question?

It is because I completely get lost while finding the answer.

As usual, a good first step is to start with the conclusion: plowing rye into the soil can play no part in effective weed control for major agricultural crops.

Next, make sure you understand the structure of the argument leading up to that conclusion. Otherwise, how will you be able to determine the vulnerability of that argument?

  • First, we are told that "rye sown in the fall and plowed into the soil in early spring leaves a residue that is highly effective at controlling broad-leaved weeds." - Okay, so if you sow rye in the fall and plow it into the soil in early spring, that should help you control broad-leaved weeds.
  • Unfortunately, that highly-effective weed control will only last for about forty-five days.
  • "No major agricultural crop matures from seed in as little as forty-five days" - Thus, the amount of time it takes for a crop to mature from seed is LESS than the amount of time the weed control remains effective. And since you can't simply "reapply" the residue from the rye, you cannot extend that 45-day effective period. This is evidence that sowing and plowing rye might not help protect your crops from broad-leaved weeds after all.
  • Unlike the rye residue that cannot simply be reapplied, synthetic herbicides CAN be reapplied as the crop grows. This fact seems to suggest that using synthetic herbicides is a more effective option than using rye residue. Thus, the author concludes that plowing rye into the soil can play no part in effective weed control for major agricultural crops.

This is what we mean when we talk about "How structural thinking can help" with CR questions (see the Ultimate CR Guide for Beginners for more details). The author presents a highly effective method for controlling broad-leaved weeds, presents a major drawback to that method, and then presents an alternative method that has the same drawback but that can be used repeatedly to address that drawback.

We've identified the conclusion and understand how the author arrived at that conclusion. NOW you can look at the question and analyze each answer choice. How might someone object to this argument? What is a major weakness in the argument? Which answer choice best completes this sentence: "The argument fails to ______."? See if that preliminary analysis helps you with the answer choices.

Good luck!
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Re: Rye sown in the fall and plowed into the soil in early [#permalink]

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New post 08 Sep 2017, 21:45
D is the right answer.
However, I feel this question is of 700 difficulty level as the average time taken is close to 2:40 Seconds.

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Re: Rye sown in the fall and plowed into the soil in early   [#permalink] 08 Sep 2017, 21:45

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