Micro Fertigation System Using Arduino Mega in Outdoor Vertical Garden.

Micro fertigation using Arduino mega based on soil moisture sensor in outdoor vertical garden is an automatic plant fertigation system in a vertically stacked structure. The system can automatically sense dry soil condition and answered correctly by fertigating the soil with the sufficient fertilizer mixed water solution . This study aimed was to compare the growth of three types of vegetables which are pak choy(Brassica rapa l. var. chinensis) ,kale(Brassica oleracea cv. group chinese kale) and kangkong (Ipomea reptans l. pior) in micro fertigation system using Arduino Mega in outdoor vertical garden. The experiment was conducted with three treatments and one control. Kangkong irrigated using automatic fertigation as first treatment, Kale irrigated using automatic fertigation as second treatment, Pak Choy irrigated using automatic fertigation as third treatment and one of each of the vegetables irrigated manually act as control. There are three replication for each treatment. From the result obtained, there are significance differences between all the treatments on the height of the plants, number of leaves and light intensity received by the plants (P < 0.05). But, there are no significant difference between all the treatments on the chlorophyll content of the vegetables(P > 0.05). Optimum height of plants is from Kangkong plant with value of 29.17cm. Next, the highest number of leaves produced is by Kangkong (7.15 units). Plus, the highest chlorophyll content recorded from Kangkong (36.86 μmol per m2 of leaf). Lastly, highest light intensity received is by Kale Sensor 3(532 lx).