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Dried grass clippings mixed into garden soil gradually

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Dried grass clippings mixed into garden soil gradually [#permalink]  22 Jul 2012, 02:57
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88% (01:56) correct 11% (00:50) wrong based on 59 sessions
3. Dried grass clippings mixed into garden soil gradually decompose, providing nutrients for beneficial soil bacteria. This results in better-than-average plant growth. Yet mixing fresh grass clippings into garden soil usually causes poorer-than-average plant growth.

Which one of the following, if true, most helps to explain the difference in plant growth described above?

(A) The number of beneficial soil bacteria increases whenever any kind of plant material is mixed into garden soil.

(B) Nutrients released by dried grass clippings are immediately available to beneficial soil bacteria.

(C) Some dried grass clippings retain nutrients originally derived from commercial lawn fertilizers, and thus provide additional enrichment to the soil.

(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.

(E) When a mix of fresh and dried grass clippings is mixed into garden soil, plant growth often decreases.
[Reveal] Spoiler: OA

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Last edited by carcass on 22 Jul 2012, 03:38, edited 1 time in total.
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  22 Jul 2012, 03:07
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  22 Jul 2012, 03:11
(D) Fresh grass clippings mixed into soil decompose rapidly, generating high levels of heat that kill beneficial soil bacteria.

for the contrary, the dried grass decompose gradually,resulting better growth.

IMO (D)
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  22 Jul 2012, 03:39
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Good )) guys

D is the only choice that explains the discrepancy. I do not think was a 700, maybe 650 you agree ??
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  22 Jul 2012, 10:23
Easy choice D............should be 650 level
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  23 Jul 2012, 11:32
600-700 level, but for sure not above 700 level question.
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Re: Dried grass clippings mixed into garden soil gradually [#permalink]  28 Jul 2012, 16:02
Cant agree more.. Dont think its a 700+ Question.
Re: Dried grass clippings mixed into garden soil gradually   [#permalink] 28 Jul 2012, 16:02
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