Tomatoes organic nitrogen

Analytical and preparative high-speed counter-current chromatography (HSCCC) has also found application for the separation of lycopene from crude extract of tomato paste. An aliquot of 2g of crude extract of tomato paste was percolated five times with 50 ml of chloroform-methanol (2 1) at ambient temperature. The combined organic phase was evaporated to dryness under a nitrogen stream. The nonaqueous two-phase system... 

Letourneau, D.K., Drinkwater, L.E. and Shennan, C. 1996. Effects of soil management on crop nitrogen and insect damage in organic vs. conventional tomato fields. Agriculture, Ecosystems and Environment 57 179-187. 

Workneh, F. and van Bruggen, A.H.G. 1994a. Suppression of corky root of tomatoes in soils from organic farms associated with soil microbial activity and nitrogen status of soil and tomato tissue. Phytopathology 84 688-694. 

Tomatoes require full sun and deep soil with a pH between 6.0 and 6.8. Work in plenty of compost before planting to add organic matter. Tomatoes require moderate levels of nitrogen and phosphorus, and moderate to high levels of potassium and calcium. Tomatoes grow best between 75° and 90°E Temperatures over 100°F can kill blossoms, while temperatures below 50°F can cause chilling injury. 

Can you analyse nitrogens (sic) for me and let me know which tomatoes have been grown organically (biologist working in a food processing company). 

In a genuine enquiry a laboratory was asked to determine organic and inorganic nitrogen in tomatoes to prove whether or not they were organically produced. 

In pure-culture inoculation experiments, made by Rovira (1963), it was found that Azotobacter did not colonize the roots of lucerne, maize, tomato, or wheat to any great extent. Clostridium and a facultative nitrogen-fixing bacillus were moderate colonizers. In mixed-culture, or unsterilized soils, where competition is likely to be very intense, one would expect even less success in attempts to influence the rhizosphere population by adding foreign organisms. 

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