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8 results

  1. Bull. Spec. CORESTA Congress, Guangzhou 1988, p. 70, AP-1

    Near infrared spectro-photometry for evaluation of breeding lines for potential yield of total particulate matter

    WILLIAMSON R.E.; SISSON V.A.; MCCLURE W.F.; CHAPLIN J.F.
    USDA-ARS, Crops Research Lab, Oxford, NC, USA
    Near infrared spectroscopy (NIRS) has tremendous potential for supporting plant breeding research. Large numbers of samples can be examined with rapid feedback of information. The objective of this study was to use NIRS for making preliminary...
  2. Bull. Spec. CORESTA Symposium, Taormina, 1986, p. 107, ST15, ISSN.0525-6240

    Near-infrared spectrophotometry of tobacco leaf for estimating total particulate matter yield of smoke

    WILLIAMSON R.E.; CHAPLIN J.F.; McCLURE W.F.
    USDA-ARS, Crops Research Lab, Oxford, NC, USA
    A project was undertaken at the Tobacco Research Laboratory, Oxford, N.C., to develop tobacco breeding lines that yield smoke low in total particulate matter (TPM). Progress has been slow due to the time required for preparing numerous small batches...
  3. Tob. Sci., 1974, 18-01, p. 1-3, ISSN.0082-4523

    Differences among tobacco varieties and breeding material in chlorophyll content during content during curing

    GWYNN G.R.; McCLURE W.F.
    Oxford Tobacco Research Laboratory, Southern Region, Agricultural Research Service, U. S. Department of Agriculture, Oxford, North Carolina USA; North Carolina State University, Raleigh, North Carolina USA
    A nondestructive electronic method for measuring chlorophyll by dual wavelengths during the yellowing phase of tobacco curing was used in several experiments. The general objectives were to apply this method to several varieties-to characterize...
  4. Tob. Sci., 1973, 17-43, p. 131-133, ISSN.0082-4523

    Technique for evaluating the yellowing rates of flue-cured tobacco

    McCLURE W.F.; GWYNN G.R.
    North Carolina State University, North Carolina USA; Oxford Tobacco Research Laboratory, Southern Region, Agricultural Research Service, U.S. Department of Agriculture, Oxford, North Carolina USA
    A dual-wavelength technique was developed for monitoring chlorophyll degradation during the yellowing phase of flue-curing tobacco. The first-order model C = Co10kt, where C = chlorophyll concentration at any time t, Co = chlorophyll concentration at...