This field investigation near Manhattan, Kansas in 1979 and 1980 includes the influence of irrigation level, N fertilization rate, and plant population density on corn (Zea mays L.) yield (grain and total dry matter) and water use. The soil was Muir silt loam. In 1979, plant population density significantly influenced grain yield, with maximum yield at a population density of approximately 68,910 plants/ha. In 1980, population density did not influence grain yield. Grain yield was not influenced by N rate in 1979, but was increased by N fertilizer applications in 1980. In 1980, corn receiving no irrigation and two irrigations produced I and 69 percent, respectively, as much grain as corn receiving seven irrigations. Seasonal water use was influenced by plant population density each year but not by N fertilization rate either year. Water use increased significantly in 1980 as irrigation level increased. With increasing energy costs and decreasing water supplies available for irrigation, careful management of irrigation water is vital. Corn (Zea mays L.) management practices such as nitrogen (N) fertilization, planting density, and irrigation timing need further examination to determine optimum production levels with limited irrigation resources. Corn grain yield is most sensitive to water deficits during flowering and early ear growth. In a 3-year evapotranspiration (ET) deficit study (Stewart et al., 1975), greatest yields were obtained when little or no ET deficit occurred during pollination. Wright et al. (1980) found that N application rates ranging from 45 to 448 kg N/ha, applied to corn grown on sandy soils, produced various grain yield responses because of different plant population densities. Maximum corn grain production involves a specific plant population density depending on the particular hybrid chosen. Termunde et al. Contribution No. 83-71 -J, Agronomy and Statistics Departments, Kansas Agric. Exp. Stn., Manhattan, Kansas 66506. This content downloaded from 207.46.13.60 on Thu, 21 Apr 2016 07:17:24 UTC All use subject to http://about.jstor.org/terms VOLUME 89, NUMBERS 3-4 111 Table 1. Rainfall and irrigation amounts during the 1979 and 1980 corn growing seasons. Rainfall (mm) Irrigation by month in 1980 (mm) Month 1979 198
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSuppression of fungal growth by isolated trypsin inhibitors of corn grainAbdul H. Halim, Clyde E. Wassom, Howard L. Mitchell, and Leon K. EdmundsCite this: J. Agric. Food Chem. 1973, 21, 6, 1118–1119Publication Date (Print):November 1, 1973Publication History Published online1 May 2002Published inissue 1 November 1973https://pubs.acs.org/doi/10.1021/jf60190a016https://doi.org/10.1021/jf60190a016research-articleACS PublicationsRequest reuse permissionsArticle Views31Altmetric-Citations12LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of corn trypsin inhibitor on growth of ratsHoward L. Mitchell, Donald B. Parrish, Margo Cormey, and Clyde E. WassomCite this: J. Agric. Food Chem. 1976, 24, 6, 1254–1255Publication Date (Print):November 1, 1976Publication History Published online1 May 2002Published inissue 1 November 1976https://pubs.acs.org/doi/10.1021/jf60208a040https://doi.org/10.1021/jf60208a040research-articleACS PublicationsRequest reuse permissionsArticle Views56Altmetric-Citations7LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose Get e-Alerts
Synopsis Of 21 F tests (variance ratios), only 1 was statistically significant, indicating randomness of pollination. For panicle number, 6 out of 9 variance ratios were significant.
Several inbred sources of corn ( Zea mays L.), including high‐lysine modified opaque‐2 lines with hard, translucent endosperm and normal hard, translucent endosperm phenotypes were examined with a scanning electron microscope. Zein bodies were observed in the protein matrix of the normal corn phenotype. Placing samples in 70% ethanol and observing voids produced confirmed that the bodies contained zein. Samples from modified opaque2 lines known to be high in lysine did not show elaborate patterns of voids in the rotein matrix after ethanol treatment. It was concluded that a scanning electron microscope is an excellent tool to identify endosperms with low zein and potentially more lysine.
Abstract Stoloniferous behavior in birdsfoot trefoil, Lotus corniculatus L., under field conditions is reported. New growth was obtained only on old prostrate woody stems. There was no evidence of genetic control of the trait.
Visual classifications were used successfully to measure differences in damage to com seedlings by the fall armyworm, Spodoptera frugiperda (J. E. Smith). Finer levels of damage are detectable using an 11-class rating system. If high levels of resistance occur, they can be detected visually. Use of seedlings permits more lines to be screened in less time with smaller space requirements than formerly, and tests can be conducted throughout the year. FAW #1, a selection from Antigua 2D × (B10 × B14), and Texas Experimental Hybrid 6417 are the most resistant lines of corn studied thus far. Ioana sweet corn was used as the susceptible check.
