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In my research I observed the effects of different poultry manure pellets on germination and pigment changes in maize and wheat with breeding test. At the end of the experiments I measured the pigment and spectral data. The effect of the pellets on the pigment content was also studied by Tukey's variance analysis and I evaluated the connection between pigment content and reflectance. Then based on the spectral data, principal component analysis was performed to select the appropriate wavelength ranges. In the case of maize, the Natur extra and Nitro-plusz poultry manure pellets produced outstanding results on sandy soil and we can raise. In the case of wheat, the P+K manure pellets produced outstanding results. The absorption of chlorophyll can be measured at 678 nm and chlorophyll b at 650 nm. When we carried out the principal componenet analysis, we could select the 520-650 nm wavelength range and 700 nm wavelength for maize. For wheat the wavelengths were 540-650 nm and 702 nm. The priority ranges and their proximity ranges may be suitable for spectral monitoring of the pigment content.

The annual application of fertilizers with nitrogen, phosphorus and potassium to wheat and maize cultures leads to an increase the concentration of heavy metals in their seeds. For this purpose,during the period 2010-2012, was studiedthe effect of application of different doses of chemical fertilizers on the lead concentration of wheat and maize grains. The results showed that with the gradual increase of the chemical fertilizer doses, the lead concentration of the cereal grains also increased. Statistically significant differences from the nonfertilized control were recorded for both grains, 0.046 mg/kg for wheat seeds and 0.059 mg/kg for maize grains respectively, in variant fertilized with N160P80K120. Lead concentrations did not exceed the maximum permitted limit of 0.2 mg Pb/kg, according to ORDER (EC) No. 1881/2006. [ABSTRACT FROM AUTHOR]

The stationary long term field experiments with chemical and organic fertilizers it was founded in 1980 at Agricultural Research and Development Station Oradea, using a unitary scheme designed by to Agricultural Research and Development Institute of Fundulea, Romania. The concentration of zinc in wheat grains and maize is influenced by doses offertilizers with nitrogen, phosphorus and manure applied and also the rainfall. In case of the control variant (N0P0 + 0 t/ha farmyard manure), the concentration of zinc in wheat grains was 11 825 mg/kg, respectively, 5.353 mg/kg in maize. Increasing doses of chemical and organic fertilizers resulted the growth in concentration of zinc in beans. In version N100P100 + 60 t/ha of manure farmyard the increase was 19.8%, in case of wheat grains, respectively 9.4% in case of maize grains. The difference was statistically recorded in case of wheat grains and not statistically significant in case of maize grain. [ABSTRACT FROM AUTHOR]