Pub Date : 1968-01-01DOI: 10.31274/RTD-180813-2851
J. L. Huggans
{"title":"Influence of egg source on the efficacy of European corn borer larvae.","authors":"J. L. Huggans","doi":"10.31274/RTD-180813-2851","DOIUrl":"https://doi.org/10.31274/RTD-180813-2851","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"90 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1968-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80578534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1965-01-01DOI: 10.31274/RTD-180813-3007
D. Castaner
This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact digirep@iastate.edu. Recommended Citation Castaner, David, "The relationship of numbers of Helicotylenchus microlobus to nitrogen soil amendments " (1965). Retrospective Theses and Dissertations. 3290. https://lib.dr.iastate.edu/rtd/3290 brought to you by CORE View metadata, citation and similar papers at core.ac.uk
{"title":"The relationship of numbers of Helicotylenchus microlobus to nitrogen soil amendments","authors":"D. Castaner","doi":"10.31274/RTD-180813-3007","DOIUrl":"https://doi.org/10.31274/RTD-180813-3007","url":null,"abstract":"This Dissertation is brought to you for free and open access by the Iowa State University Capstones, Theses and Dissertations at Iowa State University Digital Repository. It has been accepted for inclusion in Retrospective Theses and Dissertations by an authorized administrator of Iowa State University Digital Repository. For more information, please contact digirep@iastate.edu. Recommended Citation Castaner, David, \"The relationship of numbers of Helicotylenchus microlobus to nitrogen soil amendments \" (1965). Retrospective Theses and Dissertations. 3290. https://lib.dr.iastate.edu/rtd/3290 brought to you by CORE View metadata, citation and similar papers at core.ac.uk","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"267 1","pages":"125-135"},"PeriodicalIF":0.0,"publicationDate":"1965-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77710514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1962-01-01DOI: 10.31274/RTD-180813-3347
Donald G. Delisle
{"title":"Taxonomy and distribution of the genus Cenchrus","authors":"Donald G. Delisle","doi":"10.31274/RTD-180813-3347","DOIUrl":"https://doi.org/10.31274/RTD-180813-3347","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1962-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75013218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1960-01-01DOI: 10.31274/RTD-180813-2099
Dennis E. Anderson
{"title":"Taxonomy and distribution of the genus Phalaris.","authors":"Dennis E. Anderson","doi":"10.31274/RTD-180813-2099","DOIUrl":"https://doi.org/10.31274/RTD-180813-2099","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1960-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87739361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1960-01-01DOI: 10.31274/RTD-180813-1723
S. L. Welsh
{"title":"Legumes of the north-central States: Galegeae.","authors":"S. L. Welsh","doi":"10.31274/RTD-180813-1723","DOIUrl":"https://doi.org/10.31274/RTD-180813-1723","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"8 1","pages":"111-249"},"PeriodicalIF":0.0,"publicationDate":"1960-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87568437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A magnetic field gradient measuring device which uses the Hall effect in germanium has been constructed. The field sensitive element was a bar of germanium 1 mm by 1 mm by 12 mm with two sets of Hall leads each attached 2 mm from the center of the bar. With 100 cps current flowing in the long direction of the bar, the two Hall voltages were subtracted to give an output directly proportional to the magnetic field gradient. The instrument was tested in a calculable magnetic field produced by step pole pieces, and gradients from 5 gauss/inch to 500 gauss/inch in magnetic fields below 5000 gauss were measured. The instrument will also measure magnetic field strengths and relative gradients. The usefulness of the instrument is still uncertain because of errors caused by excessive field dependence of the gradient voltage. (auth)
{"title":"Measurement of magnetic field gradients by the hall effect","authors":"R. D. Redin, G. C. Danielson","doi":"10.2172/4359747","DOIUrl":"https://doi.org/10.2172/4359747","url":null,"abstract":"A magnetic field gradient measuring device which uses the Hall effect in germanium has been constructed. The field sensitive element was a bar of germanium 1 mm by 1 mm by 12 mm with two sets of Hall leads each attached 2 mm from the center of the bar. With 100 cps current flowing in the long direction of the bar, the two Hall voltages were subtracted to give an output directly proportional to the magnetic field gradient. The instrument was tested in a calculable magnetic field produced by step pole pieces, and gradients from 5 gauss/inch to 500 gauss/inch in magnetic fields below 5000 gauss were measured. The instrument will also measure magnetic field strengths and relative gradients. The usefulness of the instrument is still uncertain because of errors caused by excessive field dependence of the gradient voltage. (auth)","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"61 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"1955-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91444065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1953-01-01DOI: 10.31274/RTD-180813-14058
David G. Mobberley
This investigation deals principally with the rsdetenaination of the liffiits of and the Tariability within the species of Spartinat a genue of grasses. Results of the study show the genus to be composed of sixteen species and tm minor foras. Only one minor nomenclatorial change is proposed. Because the genus had not, heretofore, been properly typified, Spartlpa cynosuroides (L.) Roth is selected as the type species. The sixteen species are placed in three complexes on the basis of aorphological similarity. Species of the first complex possess hard, slen der culms and spikelike panicles composed of numerous, short, closely im bricate, twisted spii:es. Rhizomes are usually wanting; if present, they are short and knotty. Spartlna arundlnacea of several South Atlantic and Indian Ocean Islands, S. olllata of southern South America and S. spartinae of North and South Aiaerica are aeabers of th® first eoiatilex. The second complex consists of species with soft, fleshy, succulent culms; pilose pubescence on parts of the spikelets; and soft, flaccid rhi zomes with inflated scales. The plants are usually limited to the intertidal aone of coastal marshes. Species admitted to this complex are S. alterniflora of North and South iiaerica and Europe, foliosa. of the Pacific coast of North America, S. longispica of the region near the aouth of the River Plate in South America, marltima of lurope and Africa, S.' neyrautii of southwestern France and _S. townsepdii of England and France. Plants of the third complex are characterized by hard culms; nonspikelike panicles; usually spreading non-twisted spikes; aE,d hispid
{"title":"Taxonomy and distribution of the genus Spartina","authors":"David G. Mobberley","doi":"10.31274/RTD-180813-14058","DOIUrl":"https://doi.org/10.31274/RTD-180813-14058","url":null,"abstract":"This investigation deals principally with the rsdetenaination of the liffiits of and the Tariability within the species of Spartinat a genue of grasses. Results of the study show the genus to be composed of sixteen species and tm minor foras. Only one minor nomenclatorial change is proposed. Because the genus had not, heretofore, been properly typified, Spartlpa cynosuroides (L.) Roth is selected as the type species. The sixteen species are placed in three complexes on the basis of aorphological similarity. Species of the first complex possess hard, slen der culms and spikelike panicles composed of numerous, short, closely im bricate, twisted spii:es. Rhizomes are usually wanting; if present, they are short and knotty. Spartlna arundlnacea of several South Atlantic and Indian Ocean Islands, S. olllata of southern South America and S. spartinae of North and South Aiaerica are aeabers of th® first eoiatilex. The second complex consists of species with soft, fleshy, succulent culms; pilose pubescence on parts of the spikelets; and soft, flaccid rhi zomes with inflated scales. The plants are usually limited to the intertidal aone of coastal marshes. Species admitted to this complex are S. alterniflora of North and South iiaerica and Europe, foliosa. of the Pacific coast of North America, S. longispica of the region near the aouth of the River Plate in South America, marltima of lurope and Africa, S.' neyrautii of southwestern France and _S. townsepdii of England and France. Plants of the third complex are characterized by hard culms; nonspikelike panicles; usually spreading non-twisted spikes; aE,d hispid","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"1 1","pages":"471-574"},"PeriodicalIF":0.0,"publicationDate":"1953-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90063576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The post-crisis in blood-induced Plasmodium lophurae infections in white Pekin ducks.","authors":"E R BECKER, C E BRODINE, B L CLAPPISON","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"23 3","pages":"237-47"},"PeriodicalIF":0.0,"publicationDate":"1949-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27182799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Second supplementary list of parasitic fungi from Iowa.","authors":"J C GILMAN","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"23 3","pages":"261-72"},"PeriodicalIF":0.0,"publicationDate":"1949-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27182800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An improved high frequency conductimetric titration apparatus.","authors":"R J BEVER, C E CROUTHAMEL, H DIEHL","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":87637,"journal":{"name":"Iowa State College journal of science","volume":"23 3","pages":"289-96"},"PeriodicalIF":0.0,"publicationDate":"1949-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"27180306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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