This detector measures light in the 400 nanometer to 700 nanometer range. The aboveground biomass and nitrogen accumulation at maturity were significantly higher in aerobic culture (17.2–18.5 t/ha and 194–233 kg N/ha, respectively) than in flooded culture (14.7–15.8 t/ha and 142–173 kg N/ha). terrestrial and aquatic ecosystem productivity models to support climate change studies, The crop maintained higher nitrogen uptake in aerobic culture than in flooded culture, because in aerobic culture there was a higher nitrogen accumulation rate in the reproductive stage. The Fraction of Absorbed Photosynthetically Active Radiation (FAPAR, sometimes also noted fAPAR or fPAR) is the fraction of the incoming solar radiation in the Photosynthetically Active Radiation spectral region that is absorbed by a photosynthetic organism, typically describing the light absorption across an integrated plant canopy.This biophysical variable is directly related … both on regional and global scales.NOT CURRENTLY AVAILABLE. In both experiments, the crop phenology of wheat and pea were slightly affected by phosphorus supply. Agents that reduce light intensity tend to attenuate certain wavelengths more than others, so decreases in intensity are confounded by potential effects of light quality. of the solar radiation spectrum from 0.4 µm to 0.7 µm that is absorbed, transferred and stored In cyanobacteria, the nature and control mechanisms of PCD under UV stress still need to be explored. Place the sensor and anchor in the middle of the stream at a depth that is representative of the site. The aboveground biomass and nitrogen accumulation at maturity were significantly higher in aerobic culture (17.2–18.5 t/ha and 194–233 kg N/ha, respectively) than in flooded culture (14.7–15.8 t/ha and 142–173 kg N/ha). This spectral region corresponds more or less with the range of … If the logger is capable of averaging instantaneous measurements over the interval, program it to do so.Leave the sensor and logger in place for at least one dawn-to-dusk recording period. Data assimilation for modeling land surface offers a framework, which allows to use the observation of surface soil moisture and snow cover from space A difficulty in assimilation of the surface soil moisture (expressed in volumetric moisture) is that this quantity depends on the soil parameters used by the model (notably, the texture). The main cause of photoinhibition may be the formation of photochemically inactive PSII reaction centers, which transform excitation energy into heat (ChlF parameters are a useful tool to monitor PSII reaction to changes in light intensity (The efficiency with which absorbed PAR is used by the crop to produce dry matter is called radiation use efficiency (RUE). Estimation of RUE depends on calculating the ratio of the amount of crop biomass accumulated per unit of solar radiation intercepted. These differences between the model and observations must be corrected or otherwise risk introducing a bias in the water content of the deepest layers Vegetation intervenes directly into the water cycle by intercepting precipitation (a part of which evaporates before reaching the soil) and It is interesting to note that this relation between the information provided by the surface soil moisture and the information provided by precipitation can be exploited in order to estimate cumulative precipitation using time series of satellite observations of the surface soil moisture These improvements are explained by the fact that satellite LAI is larger than simulated LAI in winter and in spring. Photosynthetically active radiation (PAR) is light of wavelengths 400-700 nm and is the portion of the light spectrum utilised by plants for photosynthesis. A range of calibration intensities can be provided experimentally by shading the sensors for short periods (but longer than the recording interval) with varying layers of plastic window screening.