Judul: Pengujian Respon Sistem Laser Grader pada beberapa Profil Permukaan Tanah dan Tekanan Hidrolik
Abstrak: Land leveling is done to improve water use efficiency and water productivity. Land leveling operations in Indonesia are still done using conventional means, that is time-consuming and less precise. Laser land leveling operations can perform extremely well according to the desired accuracy in agricultural or non-agricultural land. Laser grader performance can be examined from the response of the system when leveling the land. Response of the system can be measured by cut and fill operation of the blade grader on some ground unevenness shape. Measurement of the ground profile was done before and after leveling to determine elevation smoothness during land leveling operations. Laser Grader systems response was influenced by several factors such as soil profile, tractor hydraulic working pressure, the slope of the ground, drag buckets tensile load, and the moisture condition of the soil. The quick response of drag buckets against an unevenness was achieved by high hydraulic working pressure. Drag buckets will be easier to level the ground with a relatively uniform slope profile and ramps. Dry-land conditions make the process of land leveling more easier.
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Judul: Uji Performansi Alat Perata Tanah Sistem Laser (Laser Based Land Leveler)
Abstrak: There are two ways to increase the agricultural productivity, agricultural intensification and agricultural extensification. Agricultural extensification is difficult to apply due to the decrease of agricultural areas today. Then the agricultural intensification is used. Application of laser land leveling with the aim to conserve irrigation water could be proposed. However, the application of laser land leveling is a new practical field work in Indonesia. Therefore, it necessary to evaluate performance of the laser based land lever according to the condition of land in Indonesia. Laser land leveling have five basic components, there are scraper, laser transmitter, laser receiver, tool box and hydraulic systems. The methodology used was to compare three methods after secondary tillage before land leveling process to get the most efficient and effective. The methods are vertical-horizontal method, diagonal method and zig-zag method. The principle of laser land leveling are light pulse which is emitted by Leica Rugby 100LR (laser transmitter) will be accepted by MLS Laser Sensor 700 (laser receiver). Then light pulse will be processed by the Control Panel MCP 700 (tool box) to command the solenoid valve that will regulate hydraulic pressure to raise or lower the scraper. Data was processed using surfer.9 which will show the shape of land surface relief. The best tillage method to be applied in land leveling process was zig-zag method. In the zig-zag method first loop, with 0.83 hours of work earned effective field capacity (KLE) 0.15 ha / hour and the capacity of removal soil was 21.57 m3. The value of elevation expectation was 14.5 cm, with value of standard deviation 0.38 and the upper limit of allowable elevation 15.8 cm. The cost of laser land leveling was Rp. 1 060 000/ha.
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Judul: Koksidiosis pada Sapi Disebabkan Eimeria Zuernii (Rivolta,1887)
Abstrak: Koksidia merupakan parasit intraseluler yang menyerang traktus digestiyus terutama bagian USUS. Penyebab penyakit ini adalah dari genus Eimeria. Koksidia yang paling patogen terhadap ternak sapi adalah Eimeria Ziuernii (Rivolta, 1887 dalam Todd dan Ernst, 1977). Siklus hidup Eimeria zuernii terdiri dari fase eksogen yang disebut juga dengan tahap sporogoni dan fase endogen yang terdiri dari tahap skizogoni dan tahap gametogoni (Soulsby, 1982).
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