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The effect of four NPK fertilizer rates (NPK[1:1:1]: 0, 300, 600, 900 kg active ingredients·ha -1 ) was studied on the growth of maize and on weed infestation - bio-mass production and nutrient uptake of weeds - in four replications in a 35-year old long-term maize continuous cropping field experiment (Keszthely, Hungary). The weed flora was recorded on 1 June, 2003 in the 6-8-leaf development stage of maize. The effect of the increasing rates of fertilizers was analyzed and evaluated from the results of biomass production as well as the nutrient uptake of weeds and maize, respectively. On the experimental plots 9 weed species were registered at the date of sampling, from which 4 species were perennial and 5 species were annual ones. All the weeds were collected from 1 m² areas of each plot and the different weed species were separated from each other. The fresh and dry weights of the canopy of maize and the different weed species were measured. The nutrient (NPK) contents of maize and weed samples were measured in the laboratory. Total and species scale nutrient concentration, as well as per-unit nutrient uptake of maize and weeds were compared. The increasing rates of mineral fertilizers had a significant effect on the biomass production and on the nutrient uptake of weeds. Significant differences were also found between the biomass production and nutrient uptake of the different weed species.

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early stage of maize vegetation period. Comm. in Soil Sci. and Plant Anal. 36. (4–6) 415–422. Lehoczky, É. et al., 2006a. Nutrient uptake by weeds in a long-term maize field experiment. Agrokémia és Talajtan

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. A növények tápanyagfelvétele. Magyar Gyomkutatás és Technológia. 3. (2) 21–29. Lozanovsky , R. & Jekics , M., 1969. Competition between weeds and maize and effect of herbicides and cultivation on the

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Agrokémia és Talajtan
Authors: Éva Lehoczky, M. Kamuti, N. Mazsu, J. Tamás, D. Sáringer-Kenyeres, and G. Gólya

Glowacka, A. , 2012. Content and uptake of microelements (Cu, Zn, Mn, Fe) by maize (Zea mays L.) and accompanying weeds. Acta Agrobotanica. 65 . (4) 179–188. Glowacka A. Content and

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872 El-Quesni, F. E. M., Gaweesh, S. S. M., Abd-Alla, M. S. (2002): Effect of weed control treatments and foliar fertilization on growth, yield, chemical composition and associated weeds of

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Bitterlich, I. and MacDonald, L. S. (1993): The prevalence of tomato spotted wilt virus in weeds and crops in southwestern British Columbia. Canadian Plant Disease Survey 73, 137

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Practices for Kharif Crops of Punjab Balyan, R. S., Pahwa, S. K., Dhankar, R. S., Malik, R. K. 1999: Efficacy of linuron and fluazifop-p-butyl against weeds in soybean (Glycine max

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, D. A., Neyra, C. B., Sanchez, M. A., Algara. P. J. (1992): Chemical control of annual weeds in field beans ( Vicia faba L.) in central Spain. Weed Sci. , 40 , 96-100. Chemical control of annual weeds in field beans (Vicia

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Acta Botanica Hungarica
Authors: P. Török, T. Miglécz, O. Valkó, K. Tóth, A. Kelemen, Á.-J. Albert, G. Matus, A. Molnár V, E. Ruprecht, L. Papp, B. Deák, O. Horváth, A. Takács, B. Hüse, and B. Tóthmérész

. and Tóthmérész, B. (2011): Penetration of weeds into the herbaceous understorey and soil seed bank of a Turkey oak-sessile oak forest in Hungary. - Comm. Ecol. 12 : 227–233. Tóthmérész B

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446 Singh, G. — D. Wright (2006): Effect of weed management on weeds, and ont he nodulation, nitrogenase activity, growth and yield of pea ( Pisum sativum ). Acta Agronomica Hungarica, 54

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