Organically grown products experienced a doubling in percent penetration of organic sales into retail markets during the period from 1997 to 2003; however, there is still a debate over the perceived quality advantage of organically grown fruits and vegetables. In a study focusing on commercial production of processing tomatoes, samples were analyzed from 4 growers with matched organic and conve...

BACKGROUND A constantly growing part of consumers considers the organic foods healthier than the conventional foods. However, so far few nutritional intervention studies in humans are available on the comparison of organic and conventional food products. OBJECTIVE The aim of the present work was to compare the total antioxidant activity of organic versus conventional fruits (apples, pears, re...

Applied acetaldehyde is known to lead to sugar accumulation in fruit including tomatoes (Lycopersicon esculentum) (O Paz, HW Janes, BA Prevost, C Frenkel [1982] J Food Sci 47: 270-274) presumably due to stimulation of gluconeogenesis. This conjecture was examined using tomato fruit pericarp discs as a test system and applied i-[U-(14)C]malic acid as the source for gluconeogenic carbon mobilizat...

BACKGROUND The aim of this study was to examine how different environmental factors (temperature, solar radiation, and vapour-pressure deficit [VPD]) influenced nutritional quality and flavour of cherry tomato fruits (Solanum lycopersicum L. cv. Naomi) grown in two types of experimental Mediterranean greenhouses: parral (low technology) and multispan (high technology). RESULTS Fruits were sam...

How farming systems supply sufficient nitrogen (N) for high yields but with reduced N losses is a central challenge for reducing the tradeoffs often associated with N cycling in agriculture. Variability in soil organic matter and management of organic farms across an agricultural landscape may yield insights for improving N cycling and for evaluating novel indicators of N availability. We asses...

This study uses retail purchase data reported by the Nielsen Homescan panel to examine the development of selected U.S. organic food sectors since the implementation of the National Organic Standards. Results show that organic market shares within the fresh fruit and vegetable sectors grew slightly in 2003–2006. Apples, bananas, carrots, and tomatoes prove to have the highest share of organic s...

This work proposed marker associations for the differentiation of some organic vegetable types (salads, tomatoes, potatoes, cabbages, garlic and leek) from vegetables obtained through conventional agricultural practices. For this purpose, a number of 30 organic and 15 conventional vegetables samples were analyzed from isotopic and elemental point of view. Thus, the best differentiation markers,...

Tomato (Solanum lycopersicum) is commonly cultivated in the greenhouse and open fields. Organic conventional nutrients are two common inputs for crops. Since there different methods producing tomatoes, four most important scenarios were selected, focusing on types of nutrient management options (organic conventional), cultivation (open field greenhouse). The organic (scenario one: GH-O), two: G...

A specific objective of this paper was to evaluate seasonal changes in bioactive compounds level (carotenoids and polyphenols) in juice prepared from organic and non-organic tomatoes in Poland. In the examined tomato juice, the content of dry matter, vitamin C, carotenoids as well as polyphenols (by HPLC method) has been measured. The presented results indicate the impact of the growing system ...