Judul: Penelaahan pengaruh sisa beberapa tanaman terhadap pertumbuhan kedele (Glycine max.L. Merr)
Abstrak: Penelitian ini bertujuan untuk mempelajari terjadinya pengaruh mendorong dan menghambat dari sisa beberapa tanaman terhadap pertumbuhan kedele serta menelaah mekanismenya. Untuk mencapai tujuan dilakukan percobaan dengan menggunakan cawan petri dan pot, di ana parameter-parameter yang diamati adalah persentase kecambab total, persentase kecambah normal, panjang akar primer, persentase tumbuh benih, tinggi tanaman, bobot kering, dan luas permukaan daun. Untuk mempelajari mekanisme terjadinya pengaruh mendorong dan menghambat, dilakukan pengukuran kadar gula, kadar asam amino total dari eksudat hipokotil kedele serta diukur pula kadar asam khlorogenat dari campuran tanah dengan sisa berbagai tanaman yang telah diperam dan dari bahan segar tanaman. Penelitian dilakukan dalam 3 tahapan pemeraman yaitu pemeraman O, 2, dan 4 minggu. Rancangan yang digunakan faktorial dengan rancangan lingkungan Rancangan Acak Lengkap dan ulangan 3 kali. Faktor I varietas kedele yaitu Orba dan B/1667, sedang faktor II perlakuan sisa-sisa tanarnan yaitu jagung, ubijalar, kedele, dan kacang hijau. Cairan ekstrak campuran tanah dengan berbagai sisa tanaman yang telah diperam digunakan untuk percobaan di cawan petri, sedang campuran tanah dengan berbagai sisa tanaman yang telah diperam selama 4 minggu digunakan sebagai medium tumbuh untuk percobaan di pot.
Keyword: Hipokotil kedele;, Asam khlorogenal;, Fosforilase;, Dekarboksilase;, Dehidrogenese; F

Judul: Pengaruh Cara Dan Dosis Pupuk Kandang Dan Kapur Terhadap Pertumbuhan Dan Produksi Kedelai (Glycine max. L.Merr)
Abstrak: Tujuan dari penelitian ini adalah untuk mengetahui pengaruh dari cara pemberian, dosis pupuk kandang, dan dosis kapur terhadap pertnmbuhan dan hasil tanaman kedelai (GZycine max L.Meml). Penelitian ini dilaksanakan pada bulan April 2006-Juli 2006 di Kebun Percobaan IPB Sawah Baru, Darmaga, Bogor, pada ketinggian 250 meter diatas pemukaan laut. Penelitian ini menggunakan rancangan Petak-petak Terbagi, dengan tiga faktor. Petak utama adalah cara pemberian, yaitu pemberian secara sebar (C1), dan pemberian pada alur benih (C2). Anak petak adalah dosis pupuk kandang, yaitu 0 ton/ha(P0), 2 ton/ha(P1), 4 ton/ha (P2), 6 ton/ha (P3). Sebagai anak-anak petak ialah perlakuan dosis kapur, yaitu 0 ton/ha, 0.4 ton/ha, 0.8 ton/ha, dan 1.2 ton/ha. Masing-masing percobaan diulang 3 kali, terdapat 96 satuan percobaan. Hasil penelitian menunjukkan bahwa cara pemberian memberikan pengaruh nyata terhadap tinggi tanaman pada 10 minggu setelah tanam (MST) dan terhadap bobot biji per petak. Pemberian secara sebar menunjukkan tinggi tanaman yang lebih tinggi daripada pemberian pada alur benih. Pemberian cara sebar juga menghasilkan bobot biji per petak yang lebih tinggi daripada cara pemberian pada alur benih.
Keyword: 

Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite