College of Dryland Agriculture and Natural Resources Management

Permanent URI for this communityhttps://repository.mu.edu.et/handle/123456789/13

Browse

Filters

2024 - 20253

Settings

Start date: 2024Subject: search.filters.subject.Yield

Search Results

Now showing 1 - 3 of 3
  • No Thumbnail Available
    Item
    Effect of Sowing Methods and Seed Rates on Growth, Yield and Yield Component of Black Cumin (Nigella sativa L.) at Endamekony district, Southern Tigray, Ethiopia
    (Mekelle University, 2025-06-16) Birhanu Reda
    Black cumin (Nigella sativa L.) is an important medicinal and commercial crop in Ethiopia. However, its productivity remains low due to lack of appropriate agronomic practices, particularly sowing methods and seed rates. A field experiment was conducted using a randomized complete block design (RCBD) in a factorial arrangement with three replications to evaluate the effects of sowing methods and seed rates on growth, yield and yield components of black cumin. The factors were; sowing methods and seed rates (5, 7.5, 10 & 12.5 kg ha-1 for row sowing) and (12.5, 15, 17.5, 20 & 22.5 kg ha-1 for broadcasting). DE, DF, DM, PH, NBPP, NCPP, NSPC, 1000 seed weight, YPP and YPH was collected and analyzed using GenStat 18 software. Result showed that, sowing method and seed rate for row sowing was statistically significant (at p < 0.05) on most yield and yield components except in days to maturity. In addition, in broadcast sowing with different seed rates on PH, NBPP, NCPP, NSPC, 1000 SWT and YPH were significant. In row sowing, yield increased from 1383 to 2137 kg ha⁻¹ as seed rate increased from 5 to 10 kg ha⁻¹, then declined to 1647 kg ha⁻¹ at 12.5 kg ha⁻¹. In broadcast sowing, yield increased from 1232 to 1714 kg ha⁻¹ as seed rate increased from 12.5 to 20 kg ha⁻¹, but declined to 1549 kg ha⁻¹ at 22.5 kg ha⁻¹. The interaction effect was significant on NBPP, DM, NCPP and YPH. The highest yield (2137 kg/ha) was obtained from sr3 and followed by sr2 under row sowing (2122 kg/ha). The study concludes that row sowing with a seed rate of 10 kg ha⁻¹ as a main effect and interaction effect and broadcast sowing with 20 kg ha⁻¹ as a main effect are optimal for maximizing black cumin yield. These findings provide practical recommendations for improving black cumin productivity and support evidence-based decision-making for farmers, researchers, and policymakers. However, further research across different agro-ecological zones and seasons is recommended to validate and fine-tune these agronomic practices.
  • No Thumbnail Available
    Item
    Effect of Blended (NPSB) Fertilizer Rates on Growth Performance, Yield and Yield Components of Tomato (Lycopersicon esculentum M.) Varieties in Enderta District, Northern Ethiopia.
    (Mekelle University, 2025-06-13) Birhane Kebede Weldegebriel
    The effects of blended fertilizer rates (NPSB) on growth, production, and yield components of tomato varieties (lycopersicon esculentum M.) were studied using irrigation facilities at Elshadai Relief and Developmental Association (ERDA agricultural farm, Mekelle). 4x3 factorial experiment was set up in a randomized complete block design (RCBD. The treatments included four rates of blended (NPSB) fertilizer (0 kg ha-1, 50 kg ha-1, 100 kg ha-1, and 150 kg ha-1) and three tomato varieties (Melka shola, Roma VF, and Gelelma). Data were collected on tomato growth, yield, and yield components. Results indicated that the impacts of blended fertilizers (NPSB) on tomato varieties were significant with p-value of 0.05 in terms of plant height, leaf number per plant, marketable fruit number per plant, and number of total fruit yield per plant, and total fruit yield per hectare. The blended fertilizer rates (NPSB) and tomato varieties had important interaction effects on the Number of fruit cluster per plant, number of leaves per plant and total fruit yield per hectare. Results indicated a positive association between tomato varieties growth, yield, and yield components. Among the different rates of blended fertilizer rates, significantly shorter days to 50% flowering dates (47 days) and maturity date (105), taller plant height (92cm), higher leaf number per plant (93.79), the highest number of total fruit number per plant (43.61), higher marketable fruit number per plant (40.51), and total fruit yield (28.23 t ha-1) were gained from the application of 150 kg ha-1 and 100 kg ha-1. Among the varieties, Gelelma produced the highest overall fruit number per plant (40.62) and marketable fruit yield (24.50 t ha- 1) over Melka shola and Roma VF. In the study area, Gelelma tomato variety treated with 150 kg ha-1 of blended (NPSB) fertilizer produced the highest total yields (32.20 t ha-1) under 150 kg ha- 1 of blended (NPSB) fertilizer. Therefore, it is recommended to conduct further research in tomato varieties in many locations and seasons with different (NPSB) blended fertilizer rates.
  • No Thumbnail Available
    Item
    Effect of Intra row Spacing and varieties on Onion (Allium Cepa L.) bulb yield and yield components in Enderta District, Southeastern Zone of Tigray, Ethiopia
    (Mekelle University, 2024-10-28) Kflom Kahsay Berhe
    Onion (Allium cepa L.) is a crucial high-value crop cultivated worldwide, including in Tigray, northern Ethiopia. Despite its economic importance, productivity of onion in Tigray, particularly in the study area, is very low. The use of poorly adapted or low-yielding varieties and improper plant spacing are among the most significant factors contributing to this low productivity. Therefore, a field experiment was conducted at the Gereb Geba irrigation scheme in Enderta District, Southeastern zone of Tigray, during the dry season of 2024 with the objective of identifying well-adapted improved varieties and optimal plant spacing to enhance onion productivity in the study area. Three varieties (Adama Red, Bombey Red, and Nasik Red) and four levels of intra-row spacing (5 cm, 7 cm, 9 cm, and 11 cm) were used as experimental materials. The treatments were arranged in a Randomized Complete Block Design (RCBD) with three replications. Data related to phenology, growth, yield, and yield components were collected and analyzed according to the standard procedures. The results indicate that the interaction effect of variety and intra-row spacing did not significantly affect the growth and yield parameters, except for the harvest index and unmarketable bulb yield. On the other hand, the main effect of variety significantly influenced the days to physiological maturity, plant height, marketable, and total yield of onions. Accordingly, Adama Red and Bombey Red are early-maturing varieties with significantly higher marketable yields (10.56 t ha⁻¹ and 10.57 t ha⁻¹) and total bulb yields (17.04 t ha⁻¹ and 14.9 t ha¹), respectively. Similarly, the main effect of intra-row spacing significantly influenced total bulb yield, marketable yield, and total biomass yield. In this regard, a narrow intra-row spacing of 5 cm showed significantly higher biomass yield (30.91 t ha⁻¹) and total bulb yield (17.72 t ha⁻¹) compared to the wider spacing. In conclusion, farmers in the study area are advised to adopt Adama red and Bombey Red varieties, along with narrower intra-row spacing (5-7 cm), for optimal yield production and productivity. Further research is also suggested in optimizing resource management and exploring the long-term effects of intra-row spacing on soil health.