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Yu, Haowei; Song, Fang; Li, Xiaohong. |
Literatures about factors affecting demand scale of rural land circulation are reviewed. Based on this, a total of 5 deficiencies in these literatures are put forward, which are the inconsistency between model selection and sample data type in some literatures, the lack of analysis from the perspective of internal family, the incomplete or inaccurate research factors, the lack of analysis on causation, and the mixture of inflow and outflow of land circulation. According to the 109 valid questionnaires in Lanshan Area, Rizhao City, Shandong Province, China, Optimal Scaling Regression Analysis is used to conduct empirical study on the land circulation status of Rizhao City by selecting three variables including family size, the annual net income of rural... |
Tipo: Thesis or Dissertation |
Palavras-chave: Demand scale of rural land circulation; Family size; Annual net income of rural household; Cultivating income; China; Land Economics/Use. |
Ano: 2009 |
URL: http://purl.umn.edu/55906 |
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Diniz,Maria Cristina Duarte Rios; Pinto,César Augusto Brasil Pereira; Lambert,Eduardo de Souza. |
Clonal families from a broad genetic base population in the Potato Breeding Program at the Universidade Federal de Lavras (UFLA), Brazil, were used in this trials. Twenty-five families were assessed in a 5 x 5 triple lattice design. Each plot consisted of 30 clones distributed in three rows of ten plants. Tuber yield per plant, percentage of large tubers, mean weight of large tubers, mean medium-sized tuber weight and tuber specific gravity were measured. Three hundred experiments were simulated varying the family sizes from three to 90 clones. The coefficients of experimental variation (CVe), the coefficients of genetic variation (CVg), heritabilities for family mean and the CVg/CVe ratio were estimated. Genetic parameters were stabilized with family... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Family size; Family selection; Genetic variance; Solanum tuberosum L. |
Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542006000200013 |
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