The residual effect of zink applied to soil
1983
Abd Elnaim, M. (Ministry of agriculture, Giza (Egypt). Agricultural research centre, Soil and water research institute) | Manojlovic, S.
The changes in zinc concentration in the soil during 3 years and changes in the dry matter production under the influence of the zinc fertilizer residues were investigated. The investigation lasted 3 years (1978,1979 and 1980). The experiment was performed under laboratory conditions with the chernozem type of soil. On the basis of the obtained results the following conclusions were drawn: Three years after the addition of zinc, 40 x 10- g Zn per container (equivalent to 8 kg of zinc as Zn DTPA/ha), the share of soluble zinc increased, probably because DTPA influences transformation from solid to soluble zinc quantities. Likewise, equivalent quantity of 4 kg Zn/ha in the form of Zn DTPA (20 X 10- g Zn per container) increased the yield of dry matter by 33.5%, compared with the control. This means that Zn DTPA supplies plants with more zinc than some other sources. In other words, the application of Zn DTPA supplies plants with more zinc than some other sources. In other words, the application of Zn DTPA is more economical than other zinc sources, such as Zn EDTA or ZnSO4, because it does not need adding each year.
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