<p>Sands have large pores so can dry quickly by evaporation process. One attempt to do to improve the productivity of sands by increasing the water holding capability with addition of organic fibers. One of them is a waste of arenga wood fiber that has not been handled properly. The purpose of this research is to determine the composition of the sand media combinations of arenga wood fiber which most suitable for planting of eggplant and tomato. This research was carried out in June to September 2013 in the screenhouse of Badan Penyuluhan Pertanian Perikanan dan Kehutanan (BP3K) Cangkringan Sleman regency. This study used a Completely Randomized Design (CRD) using a single factor which 7 treatments tested on eggplant and tomato, each treatment was repeated 5 times. Experimental data were analyzed using analysis of variance and DMRT at 5% level. The results showed that the treatment of planting media only affects to eggplant leaf number and weight of fruit per plant on both commodities. The highest number of leaves produced by the use of charcoal husk is 25.2 strands. The highest eggplant fruit weight per plant produced by the use of the washed sand medium was 209.36 g and 352.72 g for tomato planted on doesn’t wash sand.</p>

<p>Kailan is a horticultural commodity that interest but productivity of kailan reduce caused by the cultivation of agricultural land which is getting slightly. Need effort to increase productivity of kailan by applying hydroponic substrate. This study uses merapi sand and arenga wood fiber as a hydroponic substrate medium. Merapi sand is easily porous. Arenga wood fiber is waste produced by palm industry which not used maximum. This study purpose to assess whether the treatment of a mixture of merapi sand and arenga wood fiber with hydroponic substrate systems affect kailan’s growth and product. The method used completely randomized design with one factor consists of 1 control and 13 treatments. The results showed that mixture of merapi sand and arenga wood fiber give different effect on variable. Mixture of 25% arenga wood fiber and 75% Merapi sand (1: 3) have inclined more great value in the roots fresh weight and plant fresh weight. Merapi sand 100% give inclined more great value in the variable plant height and amount of leaves.</p>

<p>This research aims for finding out the response of chili to type of sound and composition of substrate in hydroponic systems and obtain the optimal composition of substrate in chili planting hydroponically. This research started from August 2014 until February 2015 at Faculty of Agriculture, Sebelas Maret University Surakarta using Completely Randomized Design that consists of two factors. First factor was sand type with 3 levels and the second one the composition of substrate with 4 levels. Data of observation result have been analyzed based on F test at 5% grade and average comparison test using Duncan Multiple Range Test (DMRT) at 5% grade. The Pearson Correlation test is used for analyzing to observe the relation of inter variable. The type of sand is not interacting with the composition of substrate except at observation of green leaves. The best growing and development of chili is at pure sand beach has the highest value it can be seen from fresh weight of root, root dry weight, plant height and canopy fresh weight, and the composition of the substrate (sand: palm wood fiber) 3:1 indicated by the root dry weight, plant height, canopy fresh weight, shoot dry weight, the weight of fruit per plant and the sum of fruits per plant.</p>

<p style="text-align: justify;">This study aims to measure the effect of volcanic sand, native sea sand and sea sand washing substrate on the growth and yield of tomatoes, measuring the effect of arengan wood fiber substrate on growth and yield of tomatoes, measuring the effect of the combination of volcanic sand, native sea sand and sea sand washing with arenga wood fiber substrate compared to the growth and yield of tomato. The research was conducted from August to December 2014 in the screen house Faculty of Agriculture, Sebelas Maret University. This study uses a completely randomized design with 1 factors with 14 treatment. The analysis of the data was tested using the F test level of 5%. After that, if the result F tests 5% significant, the analysis continued with DMRT (Duncan Multiple Range Test) level of 5%. The results showed treatment volcanic sand, native sea sand and sea sand washing substrate produce growth and good results in tomatoes when watering is often done so that the plants do not wilt. Arenga wood fiber substrate treatment resulted in poor growth of the roots and results of tomatoes. Treatment volcanic sand, native sea sand sea sand washing genuine with arenga wood fiber (1: 1) to produce growth and good results on tomato plants.</p>

<p>Lettuce (<em>Lactuca sativa</em> L.) is vegetables with high nutrient content and interest more people, meanwhile producing optimum, yet, therefore, need hydroponic substrate to increase productivity. The orange wood fiber is a waste produced by palm industry manufacturer. The waste of Arenga wood fibers has not used maximum yet, so if it’s piled up will be affects the ecosystem in around. We need to utilize the waste of Arenga wood fiber to be a substrate hydroponic. The aim of this research is to know the maximum of Arenga wood fiber composition in several sizes which is combined with the sands. It’s for increasing the growth and lettuce yield. The method of this research is completely randomized design with two factorials. They are the Arenga wood fiber composition with sand and size of Arenga wood fiber. The main variable of observation is root length, wide of leaves, and fresh weight of lettuce. The result of observation showed that the Arenga wood fiber composition and the sand composition for cultivation lettuce consist of 25% of Arenga wood fiber and 75% (1:3) of various size of sand. The highest root was 12.6 cm and it produced wide of leaves was 1602.3 cm² and increased the fresh plants until 53.7 g.</p>