Judul: The use of rock phosphates and SP-36 peat added with mineral soil ameliorant in relation to the growth of rice
Abstrak: Rendahnya produktivitas lahan gambut disebabkan oleh adanya berbagai faktor pembatas, diantaranya kandungan asam-asam fenolat yang tinggi sehingga dapat meracuni tanaman, kemasan tanah yang tinggi, kapasitas tukar kation yang sangat tinggi dengan kejenuhan basa dan ketersediaan P yang sangat rendah. Sehubungan dengan itu, kendala-kendala tersebut harus diatasi.
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Judul: The effect of mineral soil with high contents of iron application as an ameliorant on peat soil productivity in submerge condition
Abstrak: Dari beberapa hasil penelitian yang dilakukan terakhir ini menunjukkan bahwa rendahnya produktivitas tanah gambut terutama disebabkan oleh kandungan asam-asam organik yang tinggi, sehingga bersifat racun bagi tanaman, terutama asam-asam fenolat. Asam-asam fenolat tersebut merupakan hasil biodegradasi dari senyawa lignin yang dominan dalam bahan asal kayu-kayuan. Pengaruh buruk dari asam-asam fenolat dapat dikurangi dengan penambahan kation polivalen Fe. Dalam penelitian ini dicobakan penggunaan tanah mineral yang mengandung Fe tinggi sebagai bahan amelioran untuk menurunkan kandungan beberapa derivat asam fenolat dalam tanah gambut dalam kaitannya dengan produksi tanaman.
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Judul: Pengukuran Jantung Kelinci New Zealand White (Oryctolagus cuniculus) dengan Radiografi Toraks
Abstrak: This research was conducted to evaluate radiographs heart size of anaesthetized New Zealand White rabbits (Oryctolagus cuniculus) under different combination of ketamine and xylazine. The rabbits were divided into three groups. Group A were anaesthetized using a 35 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=5). Group B were anaesthetized using a 40 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3) while group C were anaesthetized using 45 mg/kg and 5 mg/kg combination of ketamine and xylazine (n=3). Parameter of observation from left laterolateral view were: 1) the apicobasilar length of the heart (AB), 2) the width of the heart (CD), 3) the distance between the cranial edge of the fifth rib and the caudal edge of the seventh rib perpendicular to the spine (R5-7), and 4) the vertical depth of the toraks (H). Parameter of observation from dorsoventral view were: 1) the length of the heart (L), 2) the width of the heart (W), and 3) the width of the thorax (T). The result from the heart parameters observation that were measured in left laterolateral view and dorsoventral view shows theres no significantly differ among the groups (P > 0.05). The vertebrae heart size (VHS) values obtained from the sum of the length of the long and the short axes on left laterolateral view. The long axes mean values (A) were 4.35±0.26 v and the short axes mean values (B) were 3.59±0.30 v, therefore VHS mean values were 7.94±0.49 v. On the dorsoventral view, the length of the heart mean values (L) were 4.32±0.29 cm, the width of the heart mean values (W) were 3.33±0.26 cm, and the width of the thorax mean values (T) were 5.85±0.30 cm. In normal conditions, the width of the heart should be less than two-thirds the width of the thorax and values obtained of 3.33<3.72 it shows that the heart is in the normal range. The best ratio to calculated the normal heart dimension in the left laterolateral view was compared the long axes with the vertical depth of the thorax, whereas in dorsoventral view, the length of the heart was compared with the width of the heart.
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