Judul: Pengaruh Waktu Pemberian Air Irigasi terhadap Tegangan Matrik Tanah dan Hasil pada Tanaman Kedelai Varietas Lokon, di BPTP Sukamandi
Abstrak: Sejalan dengan laju pertambahan penduduk dituntut usaha peningkatan produksi pertanian, khususnya tanaman pangan melalui intensifikasi usahatani maupun perluasan areal pertanian.
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Judul: Mempelajari pengaruh perbedaan waktu pemberian air irigasi terhadap hisapan matrik tanah dan produksi pada pertanaman kedelai di pilot proyek pengembangan air tanah Caruban- Madiun
Abstrak: Kedelai (Glycine max. Merr) merupakan komoditi yang cukup penting, karena mempunyai nilai ekonomi tinggi, serta merupakan sumber protein nabati yang murah. Masalah kekurangan air irigasi sering dialami oleh para petani, terutama pada musim kemarau. Untuk menghilangkan hal tersebut diperlukan suatu metoda pengairan yang dapat memberikan hasil tinggi dan sekaligus menghemat air. Tujuan penelitian ini ialah untuk mempelajari beberapa faktor yang diperlukan dalam peningkatan efisiensi penggunaan air irigasi pada tanaman kedelai. Penelitian dilakukan dengan perlakuan selang irigasi tiap 10 hari, 12 hari, 14 hari, 16 hari dan 18 hari. Hasil penelitian menunjukkan bahwa selang irigasi tiap 14 hari memberikan kondisi pF yang baik untuk pertumbuhan dan mempunyai hasil paling tinggi (1,3 ton/ha). Selang irigasi 14 hari mempunyai jumlah produksi yang berbeda nyata (uji Newman-Keuls) terhadap keempat perlakuan lainnya, pada taraf nyata 1 persen. Rancangan percobaan yang digunakan adalah rancangan faktorial dengan kelompok acak lengkap.
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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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