Oudom has been deployed an action research activity: Experiment with tomatoes at Ton Ka with two different fertilizer formulas:Formula 1:  Buffalo manure and Formula 2: Chicken manure. The area of each formula: 5m2 and start time was 23th December, 2013. This experiment was implemented on a small scale, the process had disadvantages due to fungal or hoarfrost that made tomatoes die, so they only given conclusions: In the pre-mature period of tomatoes, decomposed buffalo manure was suitable for tomatoes; in the mature period of tomatoes when they are healthy enough to highly up-take nutrients ...