Nutrition is an important factor for pakcoy cultivation in a hydroponic system so that the growth media should contain appropriate concentration of micro- and macronutrient to support plant growth. This study has been done to determine the different effect of the different liquid organic fertilizer type and concentration compared to AB Mix fertilizer on the growth and yield of pakcoy grown with the Hydroponic System. The experiment was conducted by using completely randomized design consisting of 9 combination treatments of type and concentration of liquid fertilizer.  The treatments were AB Mix Fertilizer with a concentration of 10 ml/l, 12 ml/l, 14 ml/l; Meroke Liquid Fertilizer with a concentration of 16 ml/l, 18 ml/l, 20 ml/l; and Nasa Liquid Organic Fertilizer with a concentration of 5 ml/l, 10 ml/l, 15 ml/l. The results showed that the application of 20 ml/l of Meroke liquid fertilizer significantly increased plant height, number of leaves, leaf area, plant fresh weight, and plant dry weight compared to another treatments. However it did not affect root length.

Pruning and fertilizing chili plants can increase fruit production per plant. This study aims to determine the impact of pruning and application of inorganik fertilizer on the growth and production of chili (Capsicum annuum L.) This study used a randomized block design (RBD) method using 2 factors and 3 repplication. The first factor was the pruning treatment (C) which consisted of 2 treatments: C0=without pruning and C1=with pruning. Factor II was the treatment of inorganic fertilizer were : TSP (P) fertilizer added to NPK compound fertilizer with 5 levels of concentration, namely: P0=0 g TSP + 0.5 Kg NPK/5 liters of water, P1=200 g TSP + 0.5 Kg NPK/5 liters of water , P2=400 g TSP + 0.5 Kg NPK/5 liters of water, P3=600 g TSP + 0.5 Kg NPK/5 liters of water, and P4=800 g TSP + 0.5 Kg NPK/5 liters of water.  The results showed that the interaction between pruning and the application of TSP fertilizer added to the NPK compound fertilizer had a significant effect on the growth and production of large chili plants.  The pruning treatment has a very significant effect on the growth and production of  chili plants, especially on the number of branches, the number of flowers, and the number of fruits formed. Provision of TSP fertilizer added to NPK compound fertilizer with concentrations of P = 0.25% and P = 0.29% were able to have a significant effect on the formation of branches and flowers of chili plants.

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Plant propagation of yam (Dioscorea alata L) variety ubi putih is the one of cultivation technology to conserve the plant. Propagation of D.alata can use seed, stem sett, whole tuber, tissue culture, and small sett tuber. The choose of appropriate plant propagation can reduce propagation ratio is the important thing. Although the plant has significant potential aspect, the multiplication ratio is high. Farmers usually use the whole tuber to yield favorable tuber. Using small sett tuber is the appropriate plant propagation. Reducing the multiplication ratio of D.alata is the goal of this study. The research method used two treatment factors namely the weight of tuber cuttings and tuber cuttings part. The weight of tuber cuttings used was 10-15 g; 20-25 g; 30-35 g; 40-45 g; 50-55 g. Tuber cuttings consist of the base, middle, and tail. These treatments are arranged in a two-factor factoriall design. The tuber cuttings were planted with a spacing of 80 cm X 80 cm on beds with an area of 2.40 m 2.40 m, and were repeated three times. Each bed is planted with 16 tuber cuttings. The result shows that the small sett tuber can reduce the multiplication ratio of D.alata. Sett tuber 50-55 g get the highest yield tuber (2158g) and multiplication ratio 0.023.