Judul: The characteristics and optimalization of paddy soil at solok rice production center, West Sumatera
Abstrak: Solok is known as Rice Production Center which Cisokan as one of the supreme paddy varieties. Presently, the average of Cisokan production reach 4.15 tonnes/ha and varies among the parent materials, while the highest production reach 7.08 tonnes/ha dry milled unshelled rice. This showed Cisokan production not optimal. For this reason, research has been done to optimize Cisokan production in each parent material. Results showed that optimal management for paddy soil derived from volcanic material is: urea 200 kg/ha, SP-36 500 kg/ha and KCl 50 kg/ha, the paddy soil derived from river sediment is: urea 100 kg/ha, SP-36 500 kg/ha and KCl 50 kg/ha, and the paddy soil derived from lake sediment is: urea 300 kg/ha, SP-36 100 kg/ha and KCl 100 kg/ha. The highest production reach 7.52 tonnes/ha, 6.47 tonnes/ha and 6.91 tonnes/ha dry milled unshelled rice, respectively. The application of optimal management on different soil characteristic, the criteria of land suitability for Cisokan variety have been made for each parent materials. The lesser land characteristics data needs bring through the land evaluation process easier, faster and cheaper with better results. Land characteristics that are needed to evaluate the Cisokan land use types in volcanic regions consist only of the clay content, available P2O5 and the Ca/K ratio. The paddy field in the Alluvial Plain required the clay content, total N, available P2O5, and CEC of clay. While the paddy field in the Lacustrine Plain required total N, available P2O5, Mg/K ratio and CEC of clay.
Keyword: West Sumatera, Field crops, Rice production

Judul: Analysis of the potential areas for directions to preserve paddy fields in Solok Regency- West Sumatera Province
Abstrak: The increasing of rice production by the programme of rice intensification and the controlling of paddy fields conversion becomes very important to maintain food security considering the increasing of paddy fields raw area has been difficult to be realized, mainly due to various barriers of economic and social factors, such as land status, remote location and the lack of manpower. Therefore, to ensure the food security, the priority areas that need to be preserved as paddy fields have to be set. The objective of this study was to analyze the potential of the region to be preserved as the paddy fields. The results of this study showed that there is 3.198 ha of area in Solok Regency which is suitable to be developed as paddy fields that is currently the grassland/tall grass, shrubs, bushes and fields. There are six districts namely Gunung Talang, Bukit Sundi, Kubung, Lembang Jaya, X Koto Singkarak and Junjung Sirih which is the most potential to be preserved as paddy fields by considering the availability of the technical irrigation network and the wide of semi technical, simple and village irrigation network, the value of cropping index that is more than 2 times per year and the level of paddy productivity that is more than 4,5 tons per ha. Moreover, the existence of subsidies or incentives for farmers is necessary to implement high yield productivity of farming so it could provides welfare for farmer families.
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Judul: Ornithonyssus Bursa (Berlese, 1888) Famili Macronyssidae yang Menyerang Unggas Dan Penaggulangannnya
Abstrak: Ornithonyssus bursa adalah tungau penghisap darah pada unggas di daerah tropis dan subtropis. Tungau ini relatif kecil, dengan panjang tubuh antara 700-1000 mikron dan lebarnya 250-490 mikron. Tubuhnya bulat berwarna coklat kekuningan sebelum menghisap darh dan berwarna merah setelah menghisap darah dari induk semangnya.
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