A Review of the Prospective Effects of Spacing and Varieties on Onion Yield and Yield Components (Allium cepa L.) in Ethiopia.

Onion (Allium cepa L.) is the most important commercial vegetable crop widely grown throughout the world. It is also an important bulb crop in Ethiopia. However, its production and productivity are restricted by different factors, including biotic and abiotic stresses. This review investigates the potential impacts of spacing and varieties on onion yield and yield components in Ethiopia. Countries around the world are producing onion for its nutritional value, medicinal properties, minerals, proteins, and carbohydrates. In terms of production, onion ranks second only after tomatoes. The average onion yield in Ethiopia is estimated to be 8.8 tons/ha, while in the world, it is approximately 19.7 tons/ha. Inappropriate spacing and inadequate onion varieties are some of the limitations widely described for yield variation in Ethiopia. Thus, to control the size, shape, and yield of onion bulbs, spacing determination and variety improvement are some of the techniques currently employed in Ethiopia. Adama red, Bombay red, and red creole are some of the known varieties in the country, and the intrarow spacings for Adama red and Bombay red are reported to be 4 cm and 6 cm, respectively. Different spacing between onion plants affects how much they produce and other factors such as size and quality, depending on the variety. It is important to assess whether changing spacing makes sense from both a farming and economic standpoint, alongside considering other agricultural methods.

The effects of seedling transplanting on growth and yield performance of maize (Zea mays L.) for climate change resilience in Burie District, Northwestern Ethiopia: Dataset Article.

Maize is produced throughout the world and it is also a primary staple food crop in many developing countries. The field experiment was conducted during the main rainy season of 2018 in Burie district to study the effects of types and growth stages of seedlings on the growth and yield of transplanted maize (Zea mays L.). Factorial combinations of two types of seedlings (bare rooted and poly bagged); five levels of seedling's growth stages (seedlings of 1, 2, 3, 4, and 5 true leaf/ves) and one control (direct seeded) were laid down in randomized complete block design with three replications. Data on phenological, vegetative growth and yield-related parameters were collected following standard methods and procedures. All data were subjected to analysis of variance using SAS software, and mean separation for significant treatments was done by LSD. Both main effects affected the number of grains cob-1, grain, and stover yield highly significantly and days to 50% silking very highly significantly. Types of seedlings affected days to 50% tasselling significantly; and days to 90% physiological maturity and plant height highly significantly. In addition, types of seedlings affected the number of cobs plant-1, cob length, number of grains row-1and biomass yield, very highly significantly. Seedlings' growth stages had a very highly significant effect on days to 50% tasseling and days to 90% physiological maturity. The number of cobs plant-1, cob length, number of grains row-1and biomass yield were also highly significantly affected by seedlings' growth stages. The interaction effect was highly significant on the number of cobs plant-1, grain, and stover yield and very highly significant on the harvest index. The highest (10.7t ha-1) grain yield of maize was found from the transplantation of polybagged seedlings at four true leaf stages. Although it is difficult to conclude based on one season and one location research trial, transplanting of poly-bagged seedlings at four true leaf stages gave superior grain yield. This treatment combination also gave the highest net benefit with an acceptable range of marginal rate of return. Therefore, transplanting polybagged seedlings at four true leaf stages is economically feasible and can be recommended tentatively for Burie District. However; it's also advised to repeat the study in areas having terminal moisture stress for maize production.

The effect of seed and nitrogen-phosphorous fertilizer rates on growth and yield components of bread wheat (Triticum aestivum L.) in Burie District, Northwestern Ethiopia: Dataset article.

In the absence of a recommended optimal seed rate and nitrogen-phosphorous (NP) fertilizers application for a specific area, achieving maximum bread wheat productivity becomes challenging. To address this issue, this field experiment was conducted to evaluate the effect of seed and NP fertilizer rates on growth, yield, and yield components of bread wheat (Triticum aestivum L.). Factorial combinations of four levels of seed rates of bread wheat (100, 120, 150, and 200 kg ha-1) and four levels of NP fertilizers rates (64-46, 87-46, 96-69, and 119-69 kg ha-1 of N and P2O5) were laid down in randomized complete block design with three replications. The remaining necessary agronomic practices and crop management activities were undertaken uniformly. The data presented in this dataset article includes phenological, growth, yield, and yield component parameters that were collected timely following their standard methods and procedures. All the collected data were subjected to analysis of variance (ANOVA) which was carried out using the SAS version 9.0 software computer program's General Linear Model (GLM) procedure [1]. the residuals were evaluated, as described in Montgomery [2], to confirm the normal distribution and homogeneous variance model assumptions on the error terms for each response variable. The independence assumption is upheld due to the randomization of the sixteen (16) treatment combinations within each block. In cases where a treatment effect was found to be significant, a multiple means comparison was conducted at a 5% significance level using Fisher's LSD method to create letter groupings. Additionally, correlation analysis was carried out using the Pearson correlation procedure in SAS. This dataset article provides insights into how seed rate and NP fertilizer rates impact bread wheat productivity, as well as the economic viability of optimal seed rate and NP fertilizer rates on bread wheat productivity. The information presented can serve as a valuable resource for researchers looking to examine the supplementary data and methods in detail, potentially leading to new research avenues. Furthermore, it has the potential to foster collaborations and enhance the credibility of the current research data within the scientific community, making it accessible for wider use.