AEJSA Volume 13, Number 3: July-September, 2019


Yield Optimization for Organic Greenhouse Cucumber Production

Zainab Abdel Mo’ez Embabya, Muhammad Ali Rushdib, Khaled El Sayed Abd El Mowlaa

ABSTRACT: Organic greenhouse cucumber (cucumis sativus L.) can be considered as one of several approaches to sustainable agriculture. It is more economic than conventionally grown cucumber crops. The main objective is to optimize yield and decrease costs. In general, excess in agricultural production on a reasonable basis and at a competitive price is vital to becoming better the farmers' economic situation. We introduce Weighted Goal Programming (WGP) as an efficient model in reaching optimality, involving net return, regular labor cost, crop collection cost, engineering supervision cost and seeds cost. The result revealed that the yield for cucumber crop in both greenhouse and open field covered its actual costs of production. Irrespective of the factors affecting the cucumber growth, the first optimization results are WGP model achieves the unique optimal solution for the overall problem, in greenhouse x = 165.1883 tons/acre in spring, 50.00 tons/acre in autumn, and in open field x =13.8796 tons/acre in spring, 10.4640 tons/acre in autumn. This study concluded that the cucumber greenhouse system has been shown to have higher profitability than the open-field system and is more efficient which compensates its extra costs. A marketing aspect study was suggested as it could open up more avenues for improving the performance of this organic greenhouse production system as an essential sub-sector.

[ FULL TEXT PDF 1-9 ] DOI: 10.22587/aejsa.2019.13.3.1


Mineralo-chemical study of Titanium and Zirconium as indicators for soil profile uniformity and development

N.M.A. Bahnasawy, M.M. El Kady and A.M. Elwa

ABSTRACT: The consciousness of soil development along with assessment uniformity of its parent materials is considerably needed for sustainable use of land resources, and adopt suitable techniques for land use management. Thus, the main objective of the current article is to shed light on and determine the total chemical content of titanium (Ti) and zirconium (Zr) elements and their relation to the soil's mineralogical composition as indicators for investigating soil profile uniformity and evolution. Twenty soil samples were collected from successive strata of five pedons which were selected within two geomorphological units constitute some soils south-east portion of El-Qattara depression (28о33'30" to 28о36'00"E; 30о05'33" to 30о09'10"N; 25 km2). Soils could be classified into deep coarse-textured; Typic Torripsamments. Total (Ti) ranged from 139.42 to 1736.8 while total (Zr) was < 113 mg kg-1 in the studied soils. Frequency distribution of light minerals referred to the sovereignty of quartz followed by feldspars. Heavy minerals are dominated by non-opaques represented in amphiboles, pyroxenes, resistant and parametamorphic minerals. The correlation coefficient (r) between Titanium with Rutile, Titanium with Titanite, and Zirconium with Zircon (0.316), (0.151), and (-0.107), receptivity. Based on the result, pyroboles percentages were higher than resistant minerals proportions, indicating that the investigated soils are immature and weakly developed. Microscopic graphs clarified that sediments which constitute the studied soils are mostly transported by water from near source. Moreover, irregular distribution with depth for uniformity ratios, index figures, weathering ratios of the identified minerals along with (Zr) and (Ti) contents has reflected heterogeneity of soil parent materials forming the research area. These results have to put in consideration of the land use planner for agriculture to determine the most suitable soil management for sustaining those kinds of land resources for a more extended time of productivity.

[ FULL TEXT PDF 10-20 ] DOI: 10.22587/aejsa.2019.13.3.2


Reproductive Management and Performances of Aceh Cows, Local Indonesian Cattle Kept by Farmers in A Traditional System

I Gede Suparta Budisatria, Endang Baliarti, Tri Satya Mastuti Widi, Alek Ibrahim, Bayu Andri Atmoko

ABSTRACT: Background: Aceh cattle is one of seven local cattle breed in Indonesia that have an essential role for rural communities in the economic, social, and cultural aspect. Aceh cattle kept by smallholder farmers for beef cattle purposes, and working or preparing paddy field in a traditional system with the poor condition of colony housing, tethered in the backyard, and grazed around post-harvest paddy field. As a consequence, poor performances and low reproduction rate are general phenomena for Aceh cows. Objective: The study was conducted to identify reproductive management and performance of Aceh cows kept by farmers with the traditional system in Aceh Province, Indonesia Methodology: A numbers of 162 farmers located in Muara Batu, Sawang, and Nisam sub-district, North Aceh district, Aceh Province, and their cows (175 heads) were involved in this study. Farmers were interviewed using a semi-structural questionnaire to evaluate reproduction management done by farmers, while the cows were measured and recorded for their reproductive performances. The qualitative data were analyzed descriptively, while quantitative data were analyzed using one-way analysis of variance and continued with DMRT. Results: Farmer's background on three sub-district shown the traditional system based on small ownership of cattle (3 head/farmer) and objective for saving (94,7%). The most of farmers in three different sub-districts had an excellent heat detection capability (47.2%) and applied natural mating (70.9%). Farmers at Nisam sub-district had the best management on postpartum mating, mated the cows at 110±28.19 days after calving, service per conception 1.04±0.21 times and the shortest calving intervals 12.61±1.72 months differed within Muara Batu and Sawang sub-district 14.32±3.76 and 17.11±3.65 months respectively. The first estrous age, first calving age, and estrous cycle did not differ amongst cows in three different sub-districts with the average were 27.25±3,94 months; 38.10±5,22 months; and 19.57±1,82 days, respectively. Conclusion: Reproductive management plays a role in the productivity of Aceh cows with the traditional production system, the farmers had proper management of Aceh cows reproduction. Aceh cows kept by farmers in Nisam sub-district had the best reproductive performances in terms of postpartum mating, service per conception, and calving intervals.

[ FULL TEXT PDF 21-31 ] DOI: 10.22587/aejsa.2019.13.3.3


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