SAT Prep · Skill Drills
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SAT Prep · Skill Drills
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Passage
Studies of the Effects of Tilling vs. No Tilling on Crop Yields
| Authors | Crop | Crop yield with tilling (kilograms per hectare) | Crop yield with no tilling (kilograms per hectare) |
|---|---|---|---|
| Danijel Jug and colleagues | winter wheat | 4,860 | 3,910 |
| Carlos Cantero-Martínez and colleagues | winter barley | 2,693 | 3,136 |
| R.K. Jat and colleagues | maize | 3,000 | 5,200 |
| Gevan Behnke and colleagues | soybeans | 4,285 | 3,798 |
Danijel Jug and colleagues found that tilling—the practice of turning soil with hoes, plows, or other machines before planting crops—was associated with an increased yield of winter wheat. But some studies of other crops have found the opposite effect, raising the question of whether the increase in yield found by Jug and colleagues is specific to their study crop. However, this doesn't seem to be the case: ______
Which choice most effectively uses data from the table to complete the assertion?
crop yields with tilling have ranged from 2,693 kilograms per hectare for winter barley to 4,860 kilograms per hectare for winter wheat.
Gevan Behnke and colleagues found a similar association in a study using soybeans.
a study using winter wheat yielded 4,860 kilograms per hectare with tilling and only 3,910 kilograms per hectare without tilling.
R.K. Jat and colleagues reported an even larger positive effect of tilling on the yield of maize.