| Summary: | ABSTRAK
An experiment which aimed to study the competition effect of mixed non-legume cropping system has been conducted at the Laboratory of Biotechnology of IAEA, Seibersdorf, Austria. Sorghum and Sudangrass as non-legume plants were used which planted in pure and mixed stands with planting distance betweem rows of 50 cm, 25 cm and 12,5 cm. The pures and the mixtures were put in one plot. The plots were equally fertilized with N15 labelled ammonium sulfate at rate 50 kg N ha-1.
The results of the experiment have shown clearly that no competition effect on N15 uptake has been observed between sorghum and sudangrass with different row planting distances in mixed stand.
Key words: cropping system, nitogen uptake
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