Nitrogen usually determines the productive potential of forage crops, although it is highly unstable OIL in the environment.Studies on recovery rates and use efficiency are important for more reliable fertilizer recommendations to reduce costs and avoid environmental pollution.The purpose of this study was to evaluate N use efficiency and recovery
Abstract Realizing precise and fast position control of the gear is a challenging issue because of its nonlinearity, parameter uncertainty and external disturbance.Therefore, this paper researches the clutch position control considering the influence because of the factor on the system Bra Sets performance.By virtue of the traditional adaptive cont
Previous studies of the consequences for OIL breeding birds of climate change have explored how their populations may respond to increasing temperatures.However, few have considered the likely outcome of predicted extreme conditions and the relative vulnerability of populations in different habitats.Here, we compare phenology and breeding success i