In this paper, using the computational method and intelligent method of GA genetic algorithm in order to minimize losses and improve the network voltage profile, the optimal location and size of small-scale generators (DG) in the distribution network with radial structu More
In this paper, using the computational method and intelligent method of GA genetic algorithm in order to minimize losses and improve the network voltage profile, the optimal location and size of small-scale generators (DG) in the distribution network with radial structure has been determined. We have assumed that generators are capable of generating active and reactive power, and in order to minimize losses and improve the voltage profile, the optimal location and size of the small-scale generator have been determined using the genetic algorithm method for three scenarios in four different modes. The simulation results on the IEEE 33-bus network with radial structure show that the network losses have been significantly reduced.
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A research study was carried out on the indirect selection efforts amongst small scale holders of West African Dwarf (WAD) goats based on coat pigmentation and wattle types in Ogbomoso, Nigeria using personal interviews and structured questionnaires given using simple r More
A research study was carried out on the indirect selection efforts amongst small scale holders of West African Dwarf (WAD) goats based on coat pigmentation and wattle types in Ogbomoso, Nigeria using personal interviews and structured questionnaires given using simple random on-farm techniques. The questionnaires were focused on the ownership distribution, preferred pigmentation and wattle types, disease susceptibility, death status, kidding status and market sales regarding coat pigmentation and wattle types. The questionnaires revealed that WAD goats with black pigmentation and two wattles had the highest ownership distribution, most preferred and better priced. It further revealed that black goats were highly diseased and died more, although this could be as a result of the preponderance of black goats in the study area. However, the respondents revealed that goats with two wattles were not easily susceptible to disease and lower deaths were often recorded. This showed that indirect selection of WAD goats based on coat pigmentation and wattle type is constantly going on amongst the small scale holders of WAD goats and this could be utilized for the breed genetic improvement.
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کشاورزان در مقیاس کوچک برای دستیابی به کشاورزی تجاری یکپارچه در مقیاس کوچک با موانع متعددی روبرو هستند. این مطالعه با روش توصیفی- تحلیلی به بررسی موانع کشاورزی تلفیقی تجاری در مقیاس کوچک می پردازد. جامعه آماری شامل کلیه شالیکاران استان گیلان (180106=N) بوده و حجم نمونه More
کشاورزان در مقیاس کوچک برای دستیابی به کشاورزی تجاری یکپارچه در مقیاس کوچک با موانع متعددی روبرو هستند. این مطالعه با روش توصیفی- تحلیلی به بررسی موانع کشاورزی تلفیقی تجاری در مقیاس کوچک می پردازد. جامعه آماری شامل کلیه شالیکاران استان گیلان (180106=N) بوده و حجم نمونه (422=n) با استفاده از جدول کرجسی و مورگان به روش نمونه گیری تصادفی طبقه ای تعیین شد. ابزار پژوهش پرسشنامه ای بود که روایی آن توسط پانل متخصصان و پایایی آن با ضریب آلفای کرونباخ (89/0) تأیید شد. تجزیه و تحلیل داده ها با نرم افزار SPSS و تحلیل مسیر با نرم افزار Smart PLS انجام شد. نتایج تحلیل مسیر نشان داد که موانع گسترش تأثیر مستقیم بر کشاورزی در مقیاس کوچک (441/0=β) و کشاورزی تجاری تلفیقی (401/0=β) و تأثیر غیرمستقیم بر کشاورزی تلفیقی تجاری در مقیاس کوچک (541/0 = β) و غیر مستقیم (β = 0.91). با توجه به مقدار t، فرضیه تحقیق در مورد موانع گسترش می توان نتیجه گرفت که اثربخشی بین متغیرهای مستقل و وابسته معنادار است. بر اساس نتایج بهدستآمده، استفاده از عوامل ترویجی آگاه، کاهش وظایف غیرگسترشی مروجین و کمک به سازمانهای محلی برای کاهش واسطهها از عوامل ضروری در رفع موانع این نوع سیستمهای کشاورزی است.
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This study focused to identify the likelihood factors affecting on farmers’ higher gain from paddy marketing in the North Central Province of Sri Lanka, where the main paddy cultivation area of the country. The required data was drawn from the field survey carried More
This study focused to identify the likelihood factors affecting on farmers’ higher gain from paddy marketing in the North Central Province of Sri Lanka, where the main paddy cultivation area of the country. The required data was drawn from the field survey carried out in three irrigation systems covering 257 farmers during July to August 2010. The empirical logit model was used to assess factors. The study found that imperfections of existing paddy marketing system in the area due to concentrated market power among few oligopolistic buyers. Furthermore, land size, land ownership, poor accessibility in formal sector credit market and farmers involvement in informal sector credit sources are critical to farmers’ decisions to gain higher returns from paddy marketing. The results further showed the need of reviewing the roles and functions of government extension services and farmer organizations with regard to the paddy marketing.
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The study carried out an assessment of agricultural land management practices in food crops production among small scale farmers in Kwara Sate, Nigeria. Specifically, the study determined the socio economic characteristics of crop farmers in Kwara State; ascertained the More
The study carried out an assessment of agricultural land management practices in food crops production among small scale farmers in Kwara Sate, Nigeria. Specifically, the study determined the socio economic characteristics of crop farmers in Kwara State; ascertained the cropping patterns common among them; highlighted the soil conservation methods adopted by the farmers; examined the relationship between selected socio-economic characteristics of the farmers and their adoption of major agricultural land management practices; and investigated the constraints to adoption of sustainable agricultural practices among crop farmers in Kwara State, Nigeria A three stage random sampling technique was used in selecting a total of one hundred and forty four small scale food crops farmers. Descriptive statistics, binary logistic regression model and four point Likert-type scale were used to analyse the data for the study. The study revealed that food crops production in Kwara State is dominated by middle aged men who are poorly educated and have poor access to agricultural extension services. Half of the respondents (48.60%) adopted cereal-based cropping systems. 48.6% of the farmers adopted a minimum of three management practices. Crop rotation was mostly adopted by all the farmers while irrigation was the least adopted by only 29.3% of the respondents. Furthermore, the study revealed that farm size, age, education status, number of contacts with extension agents, household size and number of farm plots of the respondents were the significant factors affecting their adoption of land management practices. The study also revealed that the major constraints to the use of sustainable crop management practices among the farmers included inadequate supply of fertilizer, inadequacy of labour and credit, poor knowledge of improved agricultural practices, poor transportation, low produce prices and high cost of production. The study recommended the need for training programme on the use of appropriate sustainable practices that will take into account the cropping systems adopted by the farmers.
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