نتایج جستجو برای: individual leaf area estimation
تعداد نتایج: 1303209 فیلتر نتایج به سال:
Leaf Area Estimation by Photographing Leaves Sandwiched between Transparent Clear File Folder Sheets
Image analysis is a promising method for in situ leaf area measurement. However, as leaves are three-dimensional, the use of two-dimensional images captured using digital camera can result underestimation. To overcome this problem, we tested clear folder method. Before photographing with camera, flattened by sandwiching them between pair transparent plastic file sheets, which stationery impleme...
Variable-rate spray systems with canopy leaf area density information detection are an important approach to reducing pesticide usage in orchard management. In order estimate the using ultrasonic sensors, this article proposed three parameter model equations based on echo peaks for estimation and verified accuracy of laboratory-simulated outdoor tree experiments. The orthogonal regression stati...
Airborne laser scanning (ALS) has been widely used to map gap probability and leaf area index (LAI) distribution at plot landscape scales. As an indirect measurement, most ALS methods estimate LAI combine waveform or point density information with supporting field measurements such as the angle distribution, probability, direct measures. The development of a more independent estimation approach...
Accurate estimation of terrestrial gross primary productivity (GPP) remains a challenge despite its importance in the global carbon cycle. Chlorophyll fluorescence (ChlF) has been recently adopted to understand photosynthesis and its response to the environment, particularly with remote sensing data. However, it remains unclear how ChlF and photosynthesis are linked at different spatial scales ...
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