Abstract
Heavy metals contaminants in land agriculture are environmental problems and to reduce the food safety, so that too needed for the research of Pb, Cd and Cu decrease absorption by plants using organic chelating agent i.e. substance of humus (humic and fulvic acid) in there manure. The research was done with completely block design, in Gagaksipat, Ngemplak, Boyolali; heavy metal analysis in manure, land and seeds use atomic absorption spectrophotometer-flame (AAS Jena Contr AA 300 German). It was aimed to identify contaminants of Pb, Cd, and Cu in sweet corn and soybean seeds. The research treatment were doses of cow manure: 15, 20, 25, 30, 35, 40, 45 and 50 kg per hectare. The results showed that's enrichment coefficient (EC) Pb and Cu in sweet corn seeds had low accumulator plants categories, whereas the EC plumbum soybean seeds had low accumulator plants categories, whereas the EC copper soybean seeds had moderately accumulator plants categories, and EC cadmium in the sweet corn and soybeans seeds were undetectable. Exposure of Pb and Cd in corn sweet and soybean seeds were undetectable, while of Cu in sweet corn and soybean seeds 2.03 and 12.39 ppm respectively. Contaminant of Pb, Cd and Cu exposure in land sweet corn post-harvested were 30.99; undetectable and 60.58 ppm respectively. While Pb, Cd and Cu exposure in land soybean post harvested were 33.24; undetectable and 56.26 ppm respectively.
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