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Biotech ppt(final)
1. Title: Testing for natural herbicides, Eliminating the weeds School: Pasir Ris Secondary School Group Member: - Fabian Ho - Myra Koh -Amelia Jane -Lee Hui Xin -Benson Quah Bio-Technology Project 2009
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11. Results substances Initial length of weeds End length of weeds pH of soil(acidic /alkaline) Did the plant die? Half boiled egg 5.0 cm 4.5 cm 7.90 No Clove oil 5.7 cm 4.9 cm 6.12 Yes Citrus oil 5.5 cm 6.5 cm 4.36 Yes Cornflakes 6.5 cm 4.9 cm 5.55 No Walnuts 5.5 cm 5.7 cm 6.31 No Toothpaste 5.1 cm 6.1 cm 6.84 Yes lime 4.9 cm 3.2 cm 2.66 No Coke 4.9 cm 4.9 cm 2.54 No Boiled water 6.2 cm 6.7 cm 7.00 No Tap water 5.5 cm 3.9 cm 7.00 No Salt solution 4.5 cm 5.0 cm 7.00 Yes Bleach 4.5 cm 5.6 cm 9.76 Yes Rootbeer 4.9 cm 3.2 cm 4.75 No Distilled White Vinegar 5.2 cm 5.5 cm 2.86 Yes Lemon flavored soap 4.5 cm 4.7 cm 6.74 Yes