نتایج جستجو برای: and farm information

تعداد نتایج: 16911304  

2003
Timothy A. Park Luanne Lohr

Organic farmers make system-level crop protection decisions that combine complementary insect, disease, nematode, and weed management strategies. Data from a national survey of U.S. organic farmers were used in a multivariate count data model to identify the farm and regional factors influencing adoption across the linked pest management categories. The results showed that weed management requi...

Journal: :علوم دامی ایران 0
زهرا قارون حسین شعبانعلی فمی خلیل کلانتری

the purpose of this descriptive– survey research was to identify areas of applying information technology in dairy cattle farm management in western tehran province. the statistical population of the study consisted of 284 dairy cattle farmers, out of whom 82 dairy cattle farmers were selected as study sample using cochran formula and proportionate stratified sampling technique. the sample size...

G.A. Moghaddam J. Shodja M. Ebrahimi S. Naghshineh S.A. Rafat,

Pedigree information of 3972 Holstein cows and bulls, from 1961 to 2008, was used to calculate inbreeding coefficients and their effects on production traits and subclinical mastitis of dairy farm cows inAzerbaijan province,Iran. Inbreeding was included in a linear mixed model as a class variable. Data were analyzed using the PROC MIXED of SAS by MIVQUE method. Results showed that average inbre...

Journal: :Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2012
Volker H Hackert Wim van der Hoek Nicole Dukers-Muijrers Arnout de Bruin Sascha Al Dahouk Heinrich Neubauer Cathrien A Bruggeman Christian J P A Hoebe

BACKGROUND In early 2009, a dairy-goat annex care farm in South Limburg, the Netherlands, reported 220 Coxiella burnetii-related abortions in 450 pregnant goats. These preceded human cases and occurred in a region that was Q-fever free before 2009, providing a unique quasi-experimental setting for investigating regional transmission patterns associated with a Q-fever point source. METHODS Ind...

Journal: :Journal of agricultural safety and health 2004
W G Allread J R Wilkins T R Waters W S Marras

Little information currently exists regarding the risk of low-back disorders among youth who perform physically demanding farm activities. Thus, afield study was conducted in which children and adolescents who engage in farm work were recruited, fitted with a lumbar motion monitoring system, and then observed performing their usual chores. The lumbar motion monitor was used to record the trunk ...

2000
M. J. Shaffer

Simulation frameworks for Decision Support Systems (DSSs) at the whole-farm level have not adequately supported process level management and integration of complex farming systems. Development of the Great Plains Framework for Agricultural Resource Management (GPFARM) DSS for whole-farm management required a simulation package that could handle this complex system. Object-oriented (OO) techniqu...

1995
A. M. Morrow

//e xte ns ion .or eg on observations are unique to a specific site or situation, and information learned is not transferable to others. Scientists rely on research-based information derived from replicated experiments that are, for the most part, reductive in nature. Farmers, on the other hand, often question the relevance of small, controlled, and replicated plot research conducted on researc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه گیلان - دانشکده علوم کشاورزی 1391

در این تحقیق، تنوع ژنتیکی جمعیت آرتمیا اورمیانا و آرتمیا فرانسیسکانا ی موجود در ایران با استفاده از 5 جفت آغازگر ریزماهواره ای (af-b105tail، af-a136، apdq03tail، apdq04tail و apdq05tail) ویژه ی آرتمیا فرانسیسکانا و آرتمیا پارتنوژنتیکا بررسی شد. از 50 سیست آرتمیا ی هر یک از این دو جمعیت به صورت انفرادی dna با روش گلوله ی داغ استخراج شد. با استفاده از آغازگر ها ی پنج گانه و از طریق واکنش زنجیره ا...

Journal: :اقتصاد و توسعه کشاورزی 0
فاطمه فتحی محمد بخشوده

demand for farm output is theoretically consistent with consumer demand and marketing performance. many studies have focused on demand interrelationships at the retail level, but not on the demand for farm output. in this study, derived demand elasticities of sheep, beef and chicken were estimated in a complete system of demand functions by seemingly unrelated regression estimator (sure) for th...

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