The study aims to determine the interaction and effect of drip irrigation on increasing the growth of pak choi plants in dry land. This study used a completely randomized design with a 3x3 pattern, so that there were 9 treatment combinations repeated 4 times so that there were 36 experimental units. The factors are the first factor, the provision of AMF consisting of three levels, namely M0: without AMF, M1: 10 grams of AMF inoculant per polybag, and M2: 30 grams of AMF inoculant per polybag. The second factor, watering arrangements consisting of three levels, namely P0: watering every morning and evening, P1: watering once every 2 days in the morning and evening, and P2: watering once every 4 days in the morning and evening. So that there are combinations of treatments are M0P0, M0P1, M0P2, M1P0, M1P1, M1P2, M2P0, M2P1 and M2P2. . The results of the study showed that the correct dosage of AMF was 30 grams per polybag in each treatment, while the routine watering time in the morning and evening was the best watering arrangement in increasing the growth and yield of pak choi plants. The combination of 30 grams of AMF with routine watering arrangements in the morning and evening with drip irrigation gave the best results for the parameters of plant height, number of leaves, and fresh weight of plants.

This research aims to determine the effect of using biochar and guano fertilizer on the growth and resistance of pakcoy to drought stress and it is hoped that this research will add information for the development of pakcoy plant cultivation techniques that are more adaptive to dry land. The method used in this research was a 2 factorial completely randomized plan. The first factor is providing Biochar (B) which consists of 4 levels: B0= Control 0 tons/ha, B2= Biochar 5 tons/ha, B3= Biochar 10 tons/ha, B4= Biochar 15 tons/ha. The second factor is the application of Guano fertilizer (G) which consists of 4 levels: G0= control 0 tons/ha, G2= Guano 5 tons/ha, G3= Guano 10 tons/ha, G4= Guano 15 tons/ha. . Based on the level of treatment used, 16 combinations were obtained, BOGO, BOG2, BOG3, BOG4, B2GO, B2G2, B2G3, B2G4, B3GO, B3G2, B3G3, B3G4, B4GO, B4G2, B4G3, B4G4, which were repeated 3 times so that there were 48 experimental units. The parameters observed include plant height, number of leaves and stem diameter. The results of the research showed that there was an interaction between plant height at 7 dap, 14 dap, 21 dap, 28 dap, number of leaves at 7 dap, 14 dap, 21 dap and stem diameter at 14 dap and 28 dap. Treatment with biochar rates of 10 tons/ha, 15 tons/ha and guano fertilizer 10 tons/ha, 15 tons/ha gave good growth results in plant height, number of leaves and stem diameter. This combination of two treatments can increase the efficiency of good nutrient uptake for optimal vegetative plant growth and can increase the soil's capacity to retain air and nutrients, while guano fertilizer provides essential nutrients that support the development of pak choy plants.

This study aims to assess the optimization of organic fertilizer in plant growth kale (Ipomea sp.) using a hydroponic system. The research method used is a complete random design of 2 factorial. The first factor is the concentration of POC which consists of 3 levels of treatment, namely K1 = 100 ml POC + 1 L of water. K2 = 200 ml of POC + 2 L of water. K3= 300 ml of POC + 3 L of water. The second factor is the frequency of administration of POC (W) which consists of 3 levels of treatment W1 = every 2 days W2 = every 4 days, W3 = every 6 days. So there are 9 combinations, namely: K1W1, K1W2, K1W3, K2W1, K2W2, K2W3, K3W1, K3W2, K3W3 between treatments with repeated 3 times so that a total of 27 trials. The measured parameters include temperature, plant height, number of leaves and Root Length. The results showed that the interaction occurred at the final temperature, plant height: 21 HST 28 HST, number of leaves: 7 HST, 14 HST ,21 HST and 28 HST and Root Length. The frequency of POC using banana stems with a time of 2 days was able to increase, plant height 21 HST, 28 HST, number of leaves 7 HST,14 HST,21 HST,28 HST, Root Length, while at a frequency of 4 days was able to increase the growth of kale plants in the late afternoon temperature parameters. At a frequency treatment once every 6 days is able to increase the final temperature. Concentration of POC using banana stem with a dose of 100 ml POC +1 L of Water, able to increase plant height 21 HST and 28 HST, the number of leaves 7 HST, 14 HST,21 HST,28 HST, Root Length. This research is expected to contribute to sustainable agricultural practices and the development of efficient hydroponic systems.