9,732 research outputs found
Study on the Effect of Timing of Irrigation on Yield and Quality of Spring-maturing Pineapple During the Fruiting Period
No full text(一)本試驗為研究臺灣鳳梨春果低產現象,與春果結實期間之灌水效果,期獲知最適宜之灌水時期,以達成經濟有效之目標
(二)試驗於52年9月至53年5月在鳳山熱帶圜藝試驗分所舉辦。
(三)早春果(9月間處埋電石,翌年4月成熟)於謝花後果實生長至成熟期間(1~4月〕行灌水最有效果,約可增加果重11~12%,花芽分化前後(9~10月)之灌水效果不著。
(四)中期春果(10月處理電石,翌年5月成熟)在花芽分化前後10~11月)行灌水,可加小果數7~8%,因而亦增加果重。結實期之灌水,亦使果重增加,依灌水期間之長短增加之程程不一,且有顯著之累積效果,全期灌水產率達22~23%,後半期之灌水效果較前半期灌水者為佳。
(五)春果在花芽分化前後及謝花後至成熟期問行灆水者,效果最大,產量增高,品質亦好。
誌謝:本研究之完成得國家長期發展科學委員會之補助,謹此誌謝。
1. This experiment investigates the cause for the lower productivity of the spring maturing fruits the pineapples of Taiwan, and the effects of irrigation during the stage of the fruiting. Expecting to find out a suitable period of irrigation attains the economical objects.
2. Th experimentation had been administrated by Feng-shan Tropical
Horticulture Experimental Station from September, 1963. to May, 1964.
3. Irrigation after the fading of the flowers that are during the stages of the developing of the fruits and the fruiting (Jan. to April) have the most significant effect, It can be increased the weight of fruits 11-12%on the early spring-maturing fruits (treated by Calcium Carbide in September, maturing in April, next year). Irrigation during the stage of floral initiation (September to Oct.) have the insignificant effect.
4. Irrigation around the stages of floral initiation (October to November) can be increased the number of fruitlets 7-8% on the mid Spring-maturing fruits (treated by Calcium Carbide in October, maturing in May, next year). Irrigation during the stage of the fruiting can be increased the weight of fruits and have an effective accumulation on the time of irrigation. The whole stage of the maturing-fruits to irrigate may be increased 22-23% and the later half of the stage IS more effective than the former half of the stage.
5. Irrigation around the stages of floral Initiation and after the fading of the flowers till the stage of maturing-fruits have the most effective, higher yields, and the best quality on the spring-maturing fruits
Multi-server collaboration system for disaster relief mission planning
Full text linkThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.Includes bibliographical references (p. 123-125).by Chang Kuang.S.M
Nested changeover designs.
No full textNested changeover designs are described for experiments in which subjects are required to perform a series of tasks (levels of a factor B) under a given set of experimental conditions in any one session. The conditions (levels of a factor A) are changed from one session to another. Within each session, carryover effects may occur. This paper defines a class of nested changeover designs which are universally optimal for estimating the direct effects of the treatment combinations when observations are independent and identically distributed. A subclass is identified which has the additional property of universal optimality for estimating the carryover effects of factor B. Designs which require fewer resources, and yet retain some optimality properties, are also investigated
Effect of angiostatin on the cell cycle
No full textThesis (S.M.)--Massachusetts Institute of Technology, Dept. of Biology, 1998.Includes bibliographical references (leaves 44-46).by Chang-Hwa Mary Chen.S.M
Early childhood stunting is associated with lower developmental levels in the subsequent generation of children
No full textBackground: linear growth retardation (stunting) is associated with lower adult cognition, educational attainment, and income. These effects, together with possible effects of stunting on birth weight and subsequent growth of offspring, suggest that stunting could be associated with poor development in the next generation of children.Objective: the objective was to compare developmental levels in children born to parents who were stunted or nonstunted in early childhood.Methods: this is a prospective cohort study of the children of participants in the Jamaica supplementation and stimulation study. The analysis compared children born to a parent who was stunted at age 9–24 mo, and did not receive the stimulation intervention, with children born to a parent in the nonstunted group. Developmental levels were measured with the Griffiths mental development scales between ages 12 and 72 mo. Mixed model regression analyses were conducted to allow for clustering of children within families and child (repeat assessments). The analyses included 89 children with a total of 156 assessments. Caregiver and home characteristics associated with the developmental quotient (DQ) or any of the subscales were included in the regressions.Results: children born to a stunted parent had lower DQs (?5.29 points; 95% CI: ?9.06, ?1.52; P = 0.01) and lower scores on the cognitive subscale (?5.77 points; 95% CI: ?10.68, ?0.87; P = 0.022). The offspring of stunted parents had lower height-for-age (?0.61 z scores; 95% CI: ?1.13, ?0.10; P = 0.021). In analyses, adjusting for child height-for-age or birth weight, the developmental differences remained significant.Conclusions: to our knowledge, this is the first report comparing the development of offspring of persons stunted in early childhood to the development of offspring of nonstunted parents. The findings suggest that the impact of stunting on development continues in the next generation of children. If replicated, these findings have important implications for estimation of the cost of stunting to social and economic developmen
Simple Approximate Solutions of Internal Circulation Periods of Liquid in Falling Droplets.
No full textFilm model for sulfur dioxide absorption into quiescent water with interfacial resistance
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