Uses Of Isotopes In Agricultural Studies

Soil fertility and plant nutrition. Isotope tracers. Autoradiography. Radiation absorption and scattering. Activation analysis. Soil nutrients in relation to plant nutrition. Fertilizer disposition. Plant root distribution. Fertility erosion. Evaluation and prospects. Tracers for soil water management. Neutron moisture gauges. Gamma radiation attenuation. Beta radiation attenuation. Sampling field soils. Soil organic matter studies. Input of organic carbon into soils. Decomposition of isotope-labelled materials in soils. Characterization of soil organic matter. Availability of nutrients released from organic residues. Soil microbiology. Soil sampling and processing. Decomposition of naturally occurring materials. Microbial biomass. Interactions of plants and microbes. Denetrification. Mineralization and immobilization of nitrogen. Biologiccal nitrogen fixation. The detection and measurement of radionuclides. Gas ionization counters. Semiconductor detectors. Semiconductor detector applications. Liquid scintillation counting. Cherenkov counting. Solid scintillation counting. Figure-of-merit. Autoradiography. The measurement of 15N. Principle of detection. Sample preparation techniques. Mass spectrometry. Emission spectrometry. The isotope dilution method.

Animals, plants, food and the environment. Crop physiology. Isotopes and methods. Photosynthesis and respiration. Major products. Water and minerals. Translocation and growth. Plant growth substances. Isotopes and food. Entomology. Pathways of radioisotope uptake and elimination. Tagging a arthropods with radioisotopes physiological studies. Radioecological investigations. Effects of irradiation. Sterile insect technique. Agricultural biochemistry. Tracer studies with 14C. Tracer studies with 13C. Tracing the fate of hydrogen. Double label isotope ratios. Kinetic isotope effects. Tracing the fate of oxygen. Precursor-product incorporation and dilution. Animal health and production. Qualitative localization of a radioisotope. Qualitative locatlization of a radioisotope. Quantitave measurement of isotopes-static measurements. Comparator studies. Isotope dilution and related studies. Analysis of dynamic systems. Stable isotopes and other procedures. Use of external and internal irradiation. Agricultural pesticide residues. Utilization of the tracer technique. Use of tracer labelling in animal esperiments. Food preservation. General effects of irradiation. Applications of irradiation. Legislation of food irradiation. Legislation of food irradiation.