Jatropha curcas (Jatropha curcas) is a woody shrub that is widely found in tropical areas. This plant is known to be very drought tolerant and easily propagated by cuttings. The oil that comes from the fence is used as fuel (biodiesel). The object of research was to find out the influence of Root Up Growth Regulating Substance (ZPT) concentration on the growth of Jatropha stem cuttings. The method of research used is an experimental method using a Group Randomized Design (RAK) with the treatment of Root Up Growth Regulators (ZPT) concentrations of 0 mg, 20 mg, 25 mg, 30 mg, and 40 mg repeated 10 times. The observed variables are, number of roots, average length of roots, number of shoots, and average length of shoots. The results obtained from giving ZPT Root up with concentrations of 0 mg, 20 mg, 25 mg, 30 mg, and 40 mg had no significant effect on the growth of the number of roots, average root length, number of shoots, and average shoot length. No significant influence of concentration was found, but seen from DMRT there was a tendency for the P2 treatment with a concentration of 25 mg to show the best average shoot length.

In the recent years, there is a significant increase on economic value of coffee as trade commodity. On that note, the most frequently used cultivation practices for coffee in Indonesia is coffee agroforestry system in private forest. However, there are still some constraints in the system development due to the traditional farmer limited knowledge of coffee cultivation practices. In this study we conducted preliminary observations on the coffee cultivation practices used by the traditional farmers to determine the steps needed to improve the coffee quality and sustainability. We study the effect of plant-spacing and shading on the growth of juvenile plant of coffee (Coffea arabica Lin.) from Sigarar utang variety. The observation was carried out in private forest of Cimarias village Sumedang district for 1 (one) month. We used the combination of 2,5m x 2,5m and 3m x 3m for plant-spacing with kayu afrika (Meisopsis eminii Engl.) as shade and without shade. This experiment used Completely Randomized Design experiment with 10 replication for each treatment, with juvenile height (cm), stem diameter (mm), and the quantity of productive primary branches as data. Then data were analyzed using Anova, Duncan’s Multiple Range Test (DMRT) 0,05, and Pearson Correlation. From the result, the best growth of juvenile plant of coffee tree was showed on 3m x 3m spacing with shade. However, the growth shown has not reached the potential of the coffee from Sigarar utang variety as supposed to in accordance with the environmental condition of the crop. This analysis also supports the prediction of low-productivity because there is positive correlation between juvenile height and the quantity of primary branches, and between stem diameter and the quantity of primary branches.

This research was conducted to observe the consortium cellulose enzyme activity that bacterial comes from oil palm empty fruit bunch waste. The use of bacterial isolates derived from oil palm empty fruit bunch waste is expected to have a good effect, because the bacteria have been adapted to live in a waste environment that has a high concentration of organic matter. The purpose of this study was to determine the activity of cellulose enzyme consortium of bacteria from palm oil waste in the process of biodegradation of oil palm empty fruit bunch waste (Elaeis guineensis Jacq.). The method used is descriptive method. The oil palm empty fruit bunch substrate was fermented and then cellulose enzyme activity was tested using the Somogyi-Nelson method. Doses of bacterial inoculums used in this study were 5% and 10%. The results showed that the consortium of bacteria from oil palm empty fruit bunch waste at a concentration of 5% with a value of 4.58 units / ml on day 21 had the highest cellulose enzyme activity.

Kilemo (Litsea cubeba) is a forest plant that has high economic value such as essential oils which can be used as raw materials for various biopharmaceutical industries such as soap, perfume, medicines, and aromatherapy. This potential has not been developed by the surrounding community as a commodity for industrial raw materials due to public ignorance in cultivating, besides the difficulty of getting seeda from kilemo itself is another reason for residents to cultivate these plants. The object of research is to identify prospective of trees plus of kilemo. The selction of plus trees was carried out using a purposive sampling system by placing units using random start method and selecting the tree heigt and diameter according to the plus tree scoring table. There were 29 prospective trees plus of kilemo identified according to their phenotypic appearance with the following characteristics: the average total tree heigt was more than 10 m (20-36 m), the branch-free height was realtively low, and the largest diameter was 32 cm. In addition, it was also found to be fruiting and flowering at 72,41%, only 17,24% to bear fruit and 10,34% to flower.