The staged addition of feed to fertilized fish ponds was evaluated by adding fertilizers to 15 ponds stocked with Nile tilapia Oreochromis niloticus, then adding feed at half ad libitum rates once fish in the ponds reached a target weight. Each pond was stocked with 750 fish (3 fish/mz), and each treatment included three ponds with first feeding at (a) 50 g, (b) 100 g, (c) 150 g, (d) 200 g, and...

Abstrak. Tanaman padi (Oryza sativa L.) merupakan tanaman pangan utama dan komoditi strategis bagi Indoesia. Produksi nasional belum mampu mencukupi kebutuhan penduduk banyak, kebijakan yang dilakukan seperti penggunaan varietas unggul, pembangunan sarana irigasi, subsidi benih, pupuk, pestisida dalam meningkatkan produksi secara nasional. Salah satu hal terpenting yaitu dengan menyediakan pupu...

introduction: in recent decades, excessive use of chemical fertilizers causes environmental problems such as water resource pollution and decrease in soil fertility. organic matters are excellent sources of plant-available nutrients and their addition to soil could maintain high microbial populations and activities. in crop studies, prabha et al. (2007) reported that there was excellent plant g...

introduction: two of the main challenges in developing countries are food production and trying to get a high income for good nutrition and reduction of poverty. cereals and legumes are the most important crops in the rainfed areas of the country occupying the majority of dry land areas. irrigated production systems had a main role in food production in the past years; but unfortunately, in rec...

Perceptual learning is an improvement in perceptual task performance reflecting plasticity in the perceptual system. Practice effects were studied in two object orientation tasks: a first order, luminance object task and a second-order, texture object task. Perceptual learning was small or absent in the first-order task, but consistently occurred for the second-order (texture) task, where it wa...

The deep sea is the largest ecosystem on Earth, yet little known about processes driving patterns of genetic diversity in its inhabitants. Here, we investigated macro- and microevolutionary shaping genomic population structure two poorly understood, globally distributed, deep-sea predators: Cuvier’s beaked whale (Ziphius cavirostris) Blainville’s (Mesoplodon densirostris). We used double-digest...

Along with the global climate change, there is an increasing interest for its effect on phenological patterns such as start and end of the growing season. Scientific digital webcams are used for this purpose taking every day one or more images from the same natural motive showing for example trees or grassland sites. To derive phenological patterns from the webcam images, regions of interest ar...