Judul: Efektivitas Pupuk Zeo-Urea Tablet terhadap Pertumbuhan dan Produksi Padi Sawah (Oryza sativa L.) Var IR-64 pada Tanah Aluvial Indramayu dan Karawang
Abstrak: Penelitian bertujuan untuk mempengaruhi pupuk Zeo-Urea tablet terhadap pertumbuhan dan produksi padi sawah serta tingkst perbandingan pupuk zeolit urea yang optimum pada tanah Aluvial Indramayu dan tanah Aluvial Karawang.
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Judul: Justifikasi Dan Perbaikan Secara Agronomi Pemakaian Pupuk Urea Tablet Pada Padi Sawah
Abstrak: Padi (Oryza sativa L.) merupakan salah satu tanaman yang sangat penting sebagai bahan pangan yang dibutuhkan Sebagian besar penduduk dunia. Pemerintah atau badan dunia yang berkaitan dengan masalah pangan selalu berusaha me- ningkatkan kuantitas dan kualitas produksi beras. Penelitian ini bertujuan untuk mengetahui (1) efisiensi pemakaian pupuk urea tablet terhadap urea butir; (2) mengetahui hubungan waktu, dosis dan bentuk pupuk terhadap pertumbuhan dan hasil sekaligus memberikan produksi tinggi pada budidaya padi sawah. Percobaan telah dilakukan di lapang di Kebun Perco- baan IPB Babakan Darmaga, Bogor. Data pendukung diperoleh dengan melakukan percobaan di pot. Percobaan dengan ran- cangan perlakuan Split-split Plot. gaman yang diteliti yaitu; Rincian sumber kera- Petak Utama: Waktu Pemberian, terdiri atas tiga taraf waktu pemberian, T1 = pupuk dibe- rikan satu kali, T2 = pupuk diberikan dua kali dan T3 = pupuk diberikan tiga kali. Anak Petak: Dosis, terdiri atas empat taraf yaitu, D1 = 45 kg N/ha, D2= 67,5 kg N/ha, D3 90 kg N/ha dan D4 = 112,5 kg N/ha. Anak-anak Petak: Bentuk pupuk, urea terdiri atas dua bentuk yaitu B1 = Urea bentuk tablet dan B2 = Urea bentuk butir. Hasil percobaan menunjukkan bahwa perlakuan T2D2B1 yaitu waktu pemberian dua kali, dosis 67,5 kg N/ha dan bentuk pupuk urea tablet memberikan hasil tertinggi yaitu 4720 kg gabah kering per hektar. Pemberian Urea Tablet Qua kali dibenarkan karena dapat memperbaiki pertumbuhan naman dan meningkatkan hasil gabah kering per satuan Luas lahan. an Dari kenaikan hasil yang diperoleh, pemakai- urea tablet lebih efisien dibandingkan dengan urea butir.,...dst
Keyword: Oryza sativa l, nitrogen in the soil, nitrogen fertilization in lowland rice plants

Judul: Categorization in Macaca fascicularis.
Abstrak: Categorization is an ability to group individuals or events into different classes mediated by conceptualized mental images. There are several levels of categorization and within a taxonomy the levels are nested. At the most concrete level of categorization, all or most members of the category shared common physical attributes that differ from other categories. The higher the level of category, the fewer common attributes between members of the group. In addition to humans, the ability to categorize has also been proposed in animals. One example of categorization in animal is species discrimination. Using matching-tosample task, present experiment tested ability of the long-tailed macaque (Macaca fascicularis) in discriminating dichotomous-stimuli of different animals. The species has been shown to be able to see photos as representations of real object so I used facial photos of humans and animals for the stimuli. First, I tested their ability to classify humans and macaques into separate group. Second, I tested their ability to discriminate their conspecific from other macaques. And the last, I tested whether the subjects were able to discriminate non-human animals from humans. In all of these experiments I found that the subjects showed high performance in categorizing objects, even when I discarded details of visual informations, such as color and local shapes. The ability to identify objects with reduced representation of physical properties means the subjects were able to generalize attributes of members of the group. This would indicate that the subjects created a higher level abstraction. On the other hand, in discriminating intrageneric macaque species I found that they were able to extract uniqueness of each species. More over, I also found that the subjects were able to put photos of non-human animals that shared very few similarities in physical percepts into one group. I suggested that the subjects could create a more abstract concept based on non-percepts relations as a basis to put the objects into one category. Thus, I concluded that M. fascicularis were able to perform multiple levels of categorizations.
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