Food quality and safety evaluation of organically grown crops versus conventionally grown crops in two types of soil
Date
2014
Abstract
The quality and safety of organic and conventional produce were evaluated. The study involved two problem soil types: acidic, clay and the lowland lahar-laden soil. Soil sampling and analyses for the selected sites were done prior to plnting selected crops: lettuce (Lactuca sativa cv. Orija de mulo), tomato (Solanum melongena), okra (Abelmoschus esculentus), and string beans (Vigna sesquipedalis) for Pampnga [Philippines]. Physico-chemical analyses of soil samples from both organic and conventional sites (nitrogen, potassium, phosphorus, organic matter, moisture content, and pH) showed improvement on the soil they had been treated. However, depletion is evident as it i s picked up by the plants or washed away by heavy rains. Chromium nickel, mercury, and cadmium were not detected on the soil samples. Lead was detected, however special precautions are needed to prevent accumulation. As for the vegetables samples, chromium, nickel, lead, mercury, cadmium and pesticide residues are not detected. Microbiological analyses of both organic and conventional vegetable samples indicated the presence of Salmonella and E.coli O157:H7 in presumptive tests. However, further testing revealed that the identities of these presumptive E.coli 0O157:H7 are Stenotrophomonas maltophilia, Pseudomonas, and Pantoea while the presumptive Salmonella colonies are Citrobacter youngae, Pantoea, and Enterobacter cloacae. Thus, there is no incidence of the mentioned microbial pathogens in both organic and conventional soils and produce from the two farm sites.
Language
English
Document Type
Article
Recommended citation
Trinidad, L. C.; Lat, E. C.; Fabro, L. M. Jr; Mejia, W. B.; Dino, C.P. A.; and Magnaye, M.J.F. A., "Food quality and safety evaluation of organically grown crops versus conventionally grown crops in two types of soil" (2014). Report. 607.
https://www.ukdr.uplb.edu.ph/reports/607
Pages /Collation
105 leaves
En – AGROVOC descriptors
LACTUCA SATIVA; LETTUCES; TOMATOES; LYCOPERSICON ESCULENTUM; CUCUMBERS; CUCUMIS SATIVUS; SWEET PEPPERS; CAPSICUM ANNUUM; MOMORDICA CHARANTIA; AUBERGINES; SOLANUM MELONGENA; OKRAS; ABELMOSCHUS ESCULENTUS; KIDNEY BEANS; VIGNA UNGUICULATA SESQUIPEDALIS; ORGANIC AGRICULTURE; SOLANUM; QUALITY; SAFETY; CLAY SOILS; SOIL ANALYSIS; SOIL CHEMICOPHYSICAL PROPERTIES; MOISTURE CONTENT; MICROBIOLOGICAL ANALYSIS; MICROORGANISMS; HEAVY METALS; PATHOGENS