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Vegetable oil for water retention in soil

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Observation

It was observed that the amount of water that evaporated from the soil sprayed with the vegetable oils was less than the amount of water that evaporated from the soil without any oil added. There was no significant difference in the amount of water lost from the cups containing different types of vegetable oil.

Condition	Amount of water evaporation (grams)
Condition	Start	Day 1	Day 2	Day 3	Day 4	Day 5
Without oil	112	106	104	101	98	96
Corn oil	116	115	113	111	109	107
Sunflower oil	116	114	112	110	108	106
Canola oil	117	116	114	112	110	108

The graph below represents the results of our science project experiment.

vegetable oil and soil water retention experiment

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Complexity level:

Project cost ($):

Time required:

1 hour to prepare, 5 days for the science project experiment

Material availability:

Easily found

Safety concerns:

Basic safety requirements