Judul: Pengaruh pemupukan N dan P terhadap produksi dan vigor benih kedelai (Glycine max (L) Merr,)
Abstrak: Sedangkan jumlah polong dan produksi dipengaruhi baik oleh pemupukan N maupun P. Dosis pupuk 22.5 kg N/ha dan 90 kg P205/ha adalah yang terbaik untuk meningkatkan jumlah polong dan produksi. Komponen produksi yang lain- nya tidak dipengaruhi oleh pemupukan N maupun P. milik Pemberian pupuk 22.5 kg N/ha dan 90 kg P205/ha sudah cukup untuk menghasilkan benih yang bervigor tinggi, karena mempunyai nilai hasil perkalian baik antara produksi dengan kecepatan tumbuh maupun produksi dengan Valk yang paling besar. Benih kedelai yang dihasilkan dari pemupukan 22.5 kg N/ha dan 90 kg P205/ha akan mempunyai kekuatan tumbuh yang tinggi serta memiliki daya simpan yang tinggi.
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Judul: Pengaruh Penggunaan Berbagai Jenis Pupuk dan Kombinasinya terhadap Produksi dan Mutu Benih Kedelai (Glycine max L.) Varietas Dega 1.
Abstrak: Penelitian ini bertujuan menentukan kombinasi pemupukan yang tepat dalam meningkatkan produksi dan mutu benih kedelai. Penelitian dilakukan pada bulan Desember 2017 hingga Maret 2018 di Kampung Tutul, Desa Cidokom, Kecamatan Rumpin, Kabupaten Bogor, Jawa Barat. Penelitian menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) faktor tunggal dengan tiga ulangan. Faktor tunggal yang diamati ialah kombinasi jenis pupuk yang terdiri atas 16 taraf yaitu, P0 (Kontrol), P1 (Pupuk kandang), P2 (POC), P3 (PGPR), P4 (NPK Phonska), P5 (Pupuk kandang + POC), P6 (Pupuk kandang + PGPR), P7 (Pupuk kandang + NPK Phonska), P8 (POC + PGPR), P9 (POC + NPK Phonska), P10 (PGPR + NPK Phonska), P11 ( Pupuk kandang + POC + PGPR), P12 (Pupuk kandang + POC + NPK Phonska), P13 (Pupuk kandang + PGPR + NPK Phonska), P14 (POC + PGPR + NPK Phonska), P15 (Pupuk kandang + POC + PGPR + NPK Phonska). Hasil penelitian menunjukkan bahwa perlakuan kombinasi pupuk memberikan pengaruh nyata terhadap pertumbuhan dan produksi benih kedelai. Kombinasi pupuk anorganaik NPK Phonska dengan pupuk organik berupa pupuk kandang atau POC dan pupuk hayati PGPR memberikan hasil terbaik pada variabel pertumbuhan dan produksi benih kedelai. Perlakuan pupuk tidak berpengaruh terhadap mutu fisiologis benih yang dihasilkan.
Keyword: NPK, PGPR, POC, produktivitas, pupuk kandang

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