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A dry ashing method is commonly used to remove organic material from samples prior to geochemical analysis. In the course of this study, the Cd isotope ratios of a series of soil and plant reference materials and samples were studied to evaluate the effect of the dry ashing method on measurement results of Cd isotope ratios. The samples were pre‐treated using the dry ashing method and high‐pressure...
This research applied the U.S. ASD Field Spec Pro VNIR 2500 High spectrometer to acquire the hyperspectral remote sensing data at different growth stages for cotton canopy, and through spectroscopic analysis of cotton canopy structure and the relationship between the spectral data. The results showed that different species, different densities, different configurations and different growing conditions...
The paper studies the temporal-spatial variability and the temporalstability of soil organic matter content in 1997, 2002,2007 through statistical methods to provide theoretical basis for the cotton soil fertility and management in the study area. Oasis cotton area in farmland of the 148th Regimental Farm of the 8th Agricultural Division Xinjiang Production and Construction Corps is the study area...
The variables of organic matter, available N, available P and available K data determined in 193 topsoil (0-30 cm) samples were selected as data sources. Fuzzy c-means clustering algorithm was used to delineate management zones. In order to determine the optimum fuzzy control parameters, the fuzziness performance index (FPI), c-?? combinations and the multiple regression based on external variable...
The research probe into the cotton's suitable fertilization time and the model of fertilization under the condition of drip irrigation under plastic film, According to the model of fertilization, the recommendatory-decision system was established using the computer information technology, the suitable amount of fertilizer in cotton and time for applying can be confirmed. At length, the cotton coordinated...
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