ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Konstantin DIMOV, Aleksander MATEV, Rossitza MERANZOVA, Nadya HRISTOVA

The aim of this work is to determine the impact of irrigation methods on soybean productivity. The field experiment was conducted during the period 2008-2010 in Agricultural University, Plovdiv. Three irrigation techniques are tested – by gravity, microsprinklers and drip irrigation. A non-irrigation plot was the control. Irrigation for all three irrigation methods is given at 80% FC for the layer 0-0.60 m. Under non-irrigation conditions, the yield is between 104 and 202 kg/da. Irrigation by furrows increases yields with 66%. The average yield for this technique is 277 kg/da. Yield increases by over 75% and reaches 295 kg/da under sprinkler irrigation, the irrigation water use efficiency (IWUE) is 0.595 kg/m3. Using drip irrigation, the yield increases by an average of 50% and reaches 250 kg/da, and the IWUE is much lower - 0.377 kg/m3. From an economic point of view, the best results are by using sprinkler irrigation. It gives yield 18% higher than that of drip and 6% higher than that of furrow irrigation.

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