Over two-thirds of the soils in world suffer from phosphorus shortages (P). Due to being unavailable all but a small portion plants, agricultural productivity diminishes. Phosphorus-deficient have traditionally been fertilized order decrease severity environmental impact. Improving management practices for sustainable crop output, including reduction loss terms runoff, is emphasis this study. I...

A large panel of German municipalities is employed in order to investigate the dynamic fiscal policy adjustment of local jurisdictions using a VEC model which explicitly takes account of the intertemporal budget constraint. The results confirm the central role of expenditure adjustment, nevertheless a substantial part of adjustment is due to changes in intergovernmental transfers, in particular...

We consider the optimal control problem of certain batch service queueing systems with compound Poisson arrivals and linear holding costs. The control problem involves the determination of the epochs at which the service is initiated as well as the sizes of the batches served. The service times are assumed to be independent and identically distributed, however, with a general distribution. A qu...

blood sulfhemoglobin (s-hb), total haemoglobin and phosphorous (p) level and blood cell count in 33 matches industry workers of azar abhar, who were exposed directly or indirectly to chemical agents used in the factory (subjects), were measured. the results were compared with the result of the same measurement on 14 farm workers of the region (control) and were analysed. in this study the effec...