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Arjasari is an area with dry land characteristics developed for the cultivation of palawija crops. The main problem with dry land is the limited availability of water. Hence, it is necessary to know how much water needs of the crops and the suitability of the crops of palawija crops developed in this region in order to make efficient use of water. The research method used is descriptive analysis method for assessing the availability of climate data to calculate the crop water requirement. The estimation of water needs of this plant uses Blaney Criddle methods with air temperature data measured directly in the field, while the determination of land suitability uses the method of arithmetic matching of land characteristics, to the land suitability class for the requirements of growing corn crops. The analysis showed that the amount of corn water requirement was 418.9 mm / season, soybean was equal to 349.6 mm / season, and sweet potato of 350.55 mm per season. The results of the land location analysis are very suitable for corn crops. The results of land suitability classification analysis for corn plant. The results of planting trials use a water demand scheme with land suitability in a predetermined monoculture system resulted in an average productivity of maize crops in the intercropping system of 3.84 tons.ha-1 and sweet potatoes of 2.1 tons.ha-1. In addition, the average yield of corn productivity in the soybean-corn intercropping system is 4.16 ton / ha and soybean is equal to 0.248 tons.ha-1. Provision of water according to the needs of plants is able to produce high productivity of crops with the more efficient use of water.

Abstract. Husodo T, Megantara EN, Mutaqin AZ, Kendarto DR, Wulandari I, Shanida SS. 2022. Short Communication: Leopard cat (Prionailurus bengalensis) distribution in the Cisokan Hydropower Plant, West Java, Indonesia. Biodiversitas 23: 6247-6253. Globally, leopard cats (Prionailurus bengalensis) can be found in various land cover types. Information about leopard cats is still low in Indonesia, especially in Java. Java Island has high human activities that impact leopard cats, such as the UCPS hydropower development area, a non-conservation area. The UCPS hydropower plant is in the upper catchment area of ??the Cisokan River as a tributary of the Citarum River. Although leopard cats can adapt to various land cover types, monitoring their existence is necessary. This study aims to reveal the distribution of leopard cats in the UCPS hydropower development area, Cianjur Regency and West Bandung Regency, West Java, Indonesia. Sign survey and literature were applied in this study. Fifty-eight leopard cat findings were found in the UCPS hydropower area. Leopard cats were found in 16 of the 47 grids from 2012-2022. After 5-10 years, leopard cats still use the same area in certain areas to meet their needs.In eight of 16 grids, 50% of the grids used by leopard cats were habitats used repeatedly. They were most commonly found in shrubs (39%), riparian (20%), and pine plantations (15%). Leopard cats were located at 445-895 masl and are most commonly found at 400-800 masl. Leopard cats are found in the UCPS development area and Perhutani Land. After 5-10 years, leopard cats still use the UCPS development area, so the habitat still fulfills their daily needs. Further monitoring is needed to determine the ecological status of the leopard cat population during the construction and post-construction process.

Water is one critical factor in the agriculture sector and becomes the first barrier in agriculture production. In the dry season, water availability without depending on the season expertise should be able to find the technological innovation that can be used to the farmers, especially in the rural areas. Global climate change caused more long dry season and will impact to decrease of water from rainfall and runoff. Rainfall and runoff harvesting it means capturing water from rainfall where it falls or capturing in and can be stored it the torrents and ponds and good enough for resources of fertigation. Fertigation engineering is the application of supplying irrigation and fertilizer to crops and engineering principles to the solution of water management problem. Research of water harvesting with cultivated of red oval cherry tomato and planted was carried out at the greenhouse located in Universitas Padjadjaran Campus, West Java Province, Indonesia from January to Mei 2017. The research method is descriptive analysis, and the red oval tomato planted it on the autopot with growth media uses mixed of charcoal husk and zeolite with ratio 9: 1 and 15 cm height. The amount of water harvesting from the green house' rooftop is 20200,5 liter per year.The amount of water used by tomato plant used auto pot is 427,12 liter. The research shows that the water used of red oval tomato where for initial stage 66 liter; development stage 36,22 liter; midseason stage 310,04 liter and late seasons stage 14,86 liter; average total water used for red oval tomato at 8,21 liter/plant. The average yield of red oval tomato per plants using autopot where the lowest yield was 0.731 kg/plant while the highest yield of 1.648 kg/plant. The value of water use efficiency of red oval tomato is 10.kg/m3.

Efforts to create a filter alternative in an emergency is very necessary in order to meet the drinking water needs. Filter pottery is one alternative screening models are cheap and mobility, so it can be applied, however, the ability of pottery on filtering raw water into drinking water needs to explored.. This study tested the ability to pottery from a mixture of clay and fine rice husk with 0.001 mole added of silver nitrate and 0.0005 mole within the period of use. This study conducted in soil and water engineering laboratory, Universitas Padjadjaran, Environmental Laboratory Institute of Ecology Universitas Padjadjaran and Energy and Mineral Resources Laboratory, West Java Province. This study also conducted pore size analysis using Scanning electron microscope (SEM) in order to know the pore diameter and pore distribution formed from the ceramic pot filter. The faucal-coli analysis is performed as an indicator of filter quality generated from the ceramic pot filter. The results showed that added of silver nitrate to lower the flow rate of 0:35 l/h. The Increasing added of silver nitrate also showed an increase in water resulting residue 0:02. Increasing the number of used periods to decrease of silver nitrate residue 0001. The results show that ceramic pot filter can reduce the number of e-coli with significant amount. The size of the pores of ceramic pots formed shows a diameter smaller than the diameter of e-coli. There are still some cracks in the process of making ceramic pots, thereby reducing the ability of ceramic pot filters to reduce e-coli.Keywords-ceramic water filter pot; e-coli residue; silver nitrate residue; number of applied.