Browsing by Author "AHMED GELETO"

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    EFFECTS OF NITROGEN FERTILIZER RATES ON GRAIN YIELD AND QUALITY OF MALT BARLEY (Hordeum vulgare L.) VARIETIES IN KOFELE WOREDA, WEST ARSI ZONE, ETHIOPIA
    (Hawassa University College of Agriculture, 2022) AHMED GELETO
    Malt barley being an important cash crop of Kofele Woreda and was cultivated for both home consumption and for market. However, its productivity and grain quality was constrained mainly by low yielding varieties and application of low levels of N fertilizers. Thus, a field experiment was conducted to evaluate the effects of nitrogen fertilizer rates on growth, yield, yield components and quality of malt barley varieties and to determine economic optimum rates of nitrogen fertilizer that give high grain yield of acceptable malt quality. A three malt barley varieties (Traveler, IBON and Local) and four levels of N fertilizer rate (0, 50, 100 and 150 kg N ha-1 ) was arranged in three replications of RCBD. Data was collected on 12 agronomic and seven malt quality traits. The study revealed that the N main effect was significant for all agronomic and quality traits except for TKW, HI, and GPR. There was significant difference among the varieties in DH, DM, PH, SL, NET, KPS, GPR, GPS, HLW and GE. The VxN interaction was significant for DH, DM, PH, SL and two of the seven quality traits (AE and HLW; malt quality traits were less affected by GxE interaction. The study revealed that nitrogen fertilization with 150kg ha-1 nitrogen fertilizer rate improved barley yield and quality.The maximum (3904.75kg ha-1 ) and minimum (2977.25kg ha-1 ) grain yield were observed from Travelear treated with 150 kg ha-1 N and IBON treated with 0 kg ha-1 N, respectively. In the present investigation, quality parameters increased with an increase in N rate, application of 150 kg N ha-1 gave the highest quality parameters studied except sieve test. Partial budget analysis revealed maximum net benefit of Birr 78095 ha-1 with an acceptable marginal rate of returns (MRR) of 2675.7% with the treatment Traveler variety with combination of 150kg N ha-1 . The lowest net benefit of (Birr 59545 ha-1 ) was recorded from IBON barley variety treated with 0 kg ha-1 Nitrogen fertilizer rate. Therefore, production of Traveler variety in combination with 150 kg N ha-1 was economical, and recommended for production of malt barley in the study area.