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Influence of etched seedcoats on the durability of soybean seed during conditioning, weatherability in the field, and the effect of cultural practices on the incidence of etched seedcoats in a seedlotBurchett, Clyde Alan January 2011 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries
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Processes influencing deterioration in stored seeds / by Suphap Suntaranond.Suntaranond, Suphap January 1993 (has links)
Bibliography: leaves 137-156. / xiv, 166 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--Dept. of Horticulture, Viticulture and Oenology, University of Adelaide, 1993
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Processes influencing deterioration in stored seedsSuntaranond, Suphap. January 1993 (has links) (PDF)
Bibliography: leaves 137-156.
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The effect on germination of artificially drying and freezing seed cornKern, Charles Isaac January 2011 (has links)
Typescript, etc. / Digitized by Kansas State University Libraries
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EFFECTS OF SELECTED SEED TREATMENTS ON GERMINATION RATES OF FIVE PLANT SPECIES.Weaver, Larrye Chris. January 1982 (has links)
No description available.
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Aspectos ecofisiológicos da germinação de sementes de mulateiro (Calycophyllum spruceanum Benth.) RubiaceaeAlmeida, Marilene de Campos [UNESP] 07 February 2003 (has links) (PDF)
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almeida_mc_dr_rcla.pdf: 738151 bytes, checksum: 5a45371e5b1849e9f76ec298848669f5 (MD5) / Informações sobre a ecofisiologia da germinação de sementes florestais amazônicas são escassas e fundamentais à compreensão do seu comportamento natural visando subsidiar programas de manejo, propagação ou estudos de regeneração natural. O objetivo deste trabalho foi estudar alguns aspectos da germinação de sementes de Calycophyllum spruceanum, espécie arbórea nativa da região amazônica. Foram avaliados o efeito da luz branca e de sombreamento, da temperatura constante e alternada, do fotoequilíbrio teórico do fitocromo, e ainda de diferentes substratos na germinação de sementes da espécie. Foi estudada também a permanência das sementes no solo sob dossel ou a pleno sol. O estudo da temperatura constante foi efetuado com intervalos de 2,5ºC a partir de 10ºC, e as melhores porcentagem, velocidade e sincronização da germinação foram obtidas sob temperatura de 20ºC, considerada ótima para a germinação da espécie. As alternâncias entre 20-25 e 15-25ºC foram as mais favoráveis para a germinação de sementes. A espécie apresentou fotoblastismo absoluto, não germinando em nenhuma das condições de escuro. As sementes germinaram em todos os fotoperíodos testados, com altas de porcentagens de germinação sob luz branca sem associação com a luz de sombreamento. A germinação foi inibida sob baixos fotoequilíbrios do fitocromo, e à medida que foi aumentado o fotoequilíbrio, houve um aumento também da porcentagem de germinação. As sementes de Calycophyllum spruceanum apresentaram resposta de fluência baixa e podem ser classificadas como sementes fotoblásticas positivas controladas pelo fitocromo B. A presença do nitrato de potássio afetou de forma negativa a germinação de suas sementes. Além disso, os resultados indicaram que podem ser utilizados para a germinação de sementes de Calycophyllum spruceanum, tanto terra vegetal, como vermiculita... / Information of ecophysiology of seed germination of Amazon forest species are of fundamental importance for the comprehension of their natural behavior for programs of propagation and forest regeneration. The aim of this paper was to study some aspects of seed germination of Calycophyllum spruceanum, arboreous species native from the Amazon region. The effect of white light and shade light, constant and alternating temperature, the theoretical photo-equilibrium of the phytochrome were evaluated, and also the effect of different substracts in the germination of seeds of this species. It was also studied the permanence of the seeds on soil under canopy or on full sun. The effect of the constant temperature was studied in the range of 10- 35,5ºC with intervals of 2,5ºC, and the best percentage, velocity and synchronization of the germination were obtained under temperature of 20ºC, considered optimal for the germination of the seeds. The alternations between 20-25 and 15-25ºC were the most favorable for the germination of seeds. The species presented absolute photoblast, with no germination in the dark. The seeds germinated in all the tested photoperiods, with high percentage germination under white light without association with the shade light. The germination was inhibited under low photoequilibrium of phytochrome, and when the photo-equilibrium was increased, increase in the germination percentage was observed. The germination of seeds of Calycophyllum spruceanum presented is controlled by low fluency response we suggest that this control is made through phytochrome B. The presence of potassium nitrate affected negatively the seed germination in Calycophyllum spruceanum. Moreover, the results indicated that soil, vermiculite or plantmax® can be used as substrate for the germination of Calycophyllum spruceanum seeds...(Complete abstract click electronic access below)
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The influence of seed weight of Sorghum bicolor (L.) Moench on the resulting cropSuh, Hyoung won January 2010 (has links)
Digitized by Kansas Correctional Industries
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Techniques for studying the effects of various cropping systems on the germination of buried weed seedsThorsen, Jack Arlen 15 October 1974 (has links)
The study of the effects of cropping systems on buried weed
seed is very costly. Most of the experiments of this nature were
conducted prior to the introduction of herbicides. New techniques,
material and methods are needed and could result in more research
in this area of study.
A polyester material was experimented with which provided a
means for mechanically washing buried weed seed packets. This was
accomplished through the development of an experimental seed
packet washer. The washer and the polyester material made it
possible to wash the soil from delicate seedlings growing inside
the packets without damage to them. They in turn could be examined
without removal from the seed packets making the procedure many
times more economical.
A seed removal technique was also developed which worked well
in separating weed seed from mineral soil samples. This was
accomplished by making slight modifications in the experimental seed packet washer regarding screening,.slope, water volume and
the usage of various sizes of soil sieves.
An economical bioassay method for studying the effects of crop
leachates on red sorrel and rice germination and growth was also
developed while simultaneously testing cropping system effects on
buried weed seed in the greenhouse and field. This method and technique
holds promise for other types of plant experiments involving
liquid and culture media.
Thirty-seven monoculture cropping systems were tested in the
greenhouse and fourteen in the field for their effects on nine
different buried weed seed species. Evidence is provided to show
that broccoli, beans, asparagus, quackgrass, tomatoes and other
plants fray be inhibitory to the subsequent germination and viability
of the buried seed of Rumex acetosella L., Rumex crispus L.,
Brassica campestris L. and Amaranthus retroflexus L. / Graduation date: 1975
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Ueber Struktur und Entwickelung eigenartiger Wandverdickungen in Samen und FruchtschalenPopovici, Al. P. January 1893 (has links)
Thesis (doctoral)--Rheinischen Friedrich-Wilhelms-Universität zu Bonn, 1893. / Includes bibliographical references.
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The effect of level of seed production on seedling vigor in alfalfaAllen, Alvin, 1919- January 1961 (has links)
No description available.
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