The process of nutrient transfer through an ecosystem is an important determinant of production, food-chain length, and species diversity. The general view is that the rate and efficiency of nutrient transfer up the food chain is constrained by herbivore-specific capacity to secure N-rich compounds for survival and production. Using feeding trials with artificial food, we show, however, that ph...

BACKGROUND Influenza virus is a globally important respiratory pathogen that causes a high degree of annual morbidity and mortality. Significant antigenic drift results in emergence of new, potentially pandemic, virus variants. The best prophylactic option for controlling emerging virus strains is to manufacture and administer pandemic vaccines in sufficient quantities and to do so in a timely ...

Abstract Pulang Pisau Steam Power Plant (PLTU) is one of the plants that used to fulfill electricity needs people in Central Kalimantan Province. By using coal as a source steam production, PLTU has capacity up 2 × 60 MW. Such large population growth cannot be avoided and it therefore denied deemed require additional production capacity. One alternative can given increase amount fuel capacity, ...

PT. ABC is a company engaged in the manufacture of Dolomite Fertilizer. The number requests greater than amount production. Due to fluctuations that tend increase, this occurs due lack capacity at workstation. Therefore, it necessary calculate requirements planning analysis for each work station know company's needs. research aims identify shortage/excess production and provide proposals balanc...

Received for publication ply 8, 1974 Nitrogen (N) fertilizer management for sugarbeet (Beta vulgaris L.) production requires more precise information than for most crops. Inadequate N limits plant growth and root yield, but excess N may reduce both sucrose percentage and recoverable sucrose (7)." Also, excess N may stimulate more leaf growth than necessary. The rate and timing of N fertilizer a...

The current study investigates performance in two-stage production systems through the measurement of capacity utilization (CU). In short-run, the degree of capacity utilization depends on the ability of decision making units to utilize fixed production factors. To develop this indicator in two-stage production processes, a modified SBM network DEA model is proposed. A numerical example is also...

Recent studies indicate that species richness can enhance the ability of plant assemblages to support multiple ecosystem functions. To understand how and when ecosystem services depend on biodiversity, it is valuable to expand beyond experimental grasslands. We examined whether plant diversity improves the capacity of agroecosystems to sustain multiple ecosystem services-production of wood and ...