988 resultados para Crick, Francis H. C


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v. 1. Some account of Peele and his writings. The arraignment of Paris. Edward the First. The old wives tale.--v. 2. David and Bethsabe. Battle of Alcazar. Device of the pageant borne before Woolstone Dixi. Descensus Astrææ. A farewell to Sir John Norris and Sir Francis Drake, &c., and a Tale of Troy. Polyhymnia. The honour of the Garter. Miscellaneous poems. Peele's Merry conceited jests. Index to the notes.--v. 3. Addenda to the account of Peele and his writings. Sir Clyomon and Sir Clamydes. An eclogue gratulatory. Speeches to Queen Elizabeth at Theobald's. Anglorum feriæ. Additional notes to vols. i. and ii.

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Plant litter and fine roots are important in maintaining soil organic carbon (C) levels as well as for nutrient cycling. The decomposition of surface-placed litter and fine roots of wheat ( Triticum aestivum ), lucerne ( Medicago sativa ), buffel grass ( Cenchrus ciliaris ), and mulga ( Acacia aneura ), placed at 10-cm and 30-cm depths, was studied in the field in a Rhodic Paleustalf. After 2 years, = 60% of mulga roots and twigs remained undecomposed. The rate of decomposition varied from 4.2 year -1 for wheat roots to 0.22 year -1 for mulga twigs, which was significantly correlated with the lignin concentration of both tops and roots. Aryl+O-aryl C concentration, as measured by 13 C nuclear magnetic resonance spectroscopy, was also significantly correlated with the decomposition parameters, although with a lower R 2 value than the lignin concentration. Thus, lignin concentration provides a good predictor of litter and fine root decomposition in the field.

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Mode of access: Internet.