Judul: Rootstock Selection and Grafting Compatibility of Physic Nut (Jatropha curcas L.) to Increase Drought Stress Tolerance and Productivity.
Abstrak: Tujuan umum penelitian ini adalah menyeleksi calon batang bawah yang toleran cekaman kekeringan, dan teknik penyambungan yang memiliki kompatibilitas tinggi untuk mendapatkan bahan tanaman kombinasi sambungan yang memiliki produktivitas tinggi dan toleran cekaman kekeringan. Penelitian ini terdiri atas lima percobaan., The general objective of this experiment was to obtain rootstock tolerant to drought which support high productivity of scion, and high compatibility grafting techniques. The study consisted of five experiments. The objective of the first experiment was to determine rapid, accurate, and simple selection method of Jatropha rootstock candidates to drought stress.
Keyword: Jatropha Curcas L, rapid selection, drought stress, rootstocks, Horticulture, Agronomy

Judul: Kompatibilitas Sambungan Beberapa Aksesi Jarak Pagar (Jatropha Curcas L.) Unggulan untuk Memacu Produksi pada Lahan Masam
Abstrak: Grafting in physic nut (Jatropha curcas L.) is an effective methode to improve plant yield by combining distinc rootstock and scion in other to grow better and high yield under marginal land. The aim of the study was to find the best combination of graft compatibility between Jatropha curcas accessions to improve yield under marginal land especially on acid soils. The experiment was conducted in polybag using compeletely randomize design with three factors. The first factor was four J.curcas accessions (B3, J2, JB, and S1) as rootstock. The second factor was two J.curcas accessions (IP3A and IP3P) as scion. The third factor was the type of soils i.e. Sawah Baru Andosol soil (M1) and Jasinga podzolic red yellow (M2). The parameters were observed consist of scion elongation, stem diameter, number of leaf, number of branch, root and shoot dry weight, flowering and yield. The result showed that growth parameters except number of branch were not influenced by the type of soil. Succesfully of grafting were 95.1 percent. It was determined by compatibility of rootstock and scion. In general, scion elongation, stem diameter, root dry weight and shoot dry weight significantly determined by rootstocks. Rootstocks of JB, B3, and S1 showed higher growth rates than rootstocks J2. Anatomical observation indicated that graft union formation in IP3A slower than IP3P. While, flowering and yield were determined by accession of scion. Percentage of flowering in IP3P and IP3A in all combinations with rootstocks were 100% and 25% respectively. It can be concluded that JB/3P, B3/3P, S1/3P, J2/3P, B3/3A, and S1/3A were the best and potencial combinations to improve yield on acid soils.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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