الفهرس 
materials and methodsOnly 14 pages are availabe for public view
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Abstract
This work was postulated to study the effects of soil pollution by high doses of nitrogen and potassium fertilizers on spinach and radish plants and on soil chemical properties. Two pot trials were carried out at greenhouse of soil department, Faculty of Agriculture, Mansoura University on silty clay loam soil during winter season (2003-2004) using spinach and radish plants. The obtained results could be summarized as follows: 11 NO3 content (mg.kg1) in soil: NO3 content in the soil after the harvest of spinach and radish plants increased slightly by increasing K application rates and increased by increasing N application rates. 12 NH4+ content (mg.kg1) in soil: NH4+ content in the soil increased respectively by increasing K application rates and increased by increasing N application rates. 13 Available N content (mg.kg1) in soil: Available N content in the soil increased respectively by increasing K application rates. 14 P content (mg.kg1) in soil: increased respectively by increasing K application rates and increased by increasing N application rates. 15 K content (mg.kg1) in soil: increased respectively by increasing K application rates and increased by increasing N application rates. 21 Effect of high doses of N and K application on fresh weight (F.W.): Fresh weight (g/pot) of leaves spinach and radish leaves and radish roots increased by increasing K application rates. The difference between K treatments were highly significant and increasing N application rates. The difference among N treatments were highly significant for N rates. 22 Effect of high doses of N and K applications on Dry weight (DW) g/pot: Increasing K application rates increased dry weight (g/pot). The difference between K treatments were highly significant. 23 Effect of high doses of N and K application on NO2 (mg.kg1) concentration in plant organs: NO2 concentration increased by increasing K application rates. The difference between K treatments were highly significant. 24 Effect of high doses of N and K application on NO3 (mg.kg1) concentration in plant organs: NO3 concentration in spinach and radish organs increased by increasing K application rates. The differences between K treatment were highly significant. 25 Effect of high doses of N and K application on Total N (%) in plant organs: N concentration % increased by increasing K application rates. The difference between K treatments were highly significant. 26 Effect of high doses of N and K application on Total P (%) in plant organs: Total P concentration % increased slightly by increasing K application rates. The difference between K treatments were highly significant. 27 Effect of high doses of N and K application on Total K (%) in plant organs: Total K% increased significant highly by increasing K applications. The difference between K treatments were highly significant. 28 Effect of high doses of N and K application on N uptake by spinach and radish plants: N uptake increased slightly by increasing K application rates. The difference between K treatment were highly significant. 29 Effect of high doses of N and K application on P uptake by spinach and radish plants: P uptake by spinach and radish plants increased slightly by increasing K application rates. The difference between K treatments were highly significant. 210 Effect of high doses of N and K application on K uptake by spinach and radish plants: Increasing K application rates, increased K uptake of leaves of spinach and radish plants.