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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 1 to 3 of 3 (0.041 seconds)Spelling suggestions: "subject:"milking""
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Timing of Weed Control Increases the Anthesis-Silking Interval in MaizeReid, Andrew 07 June 2013 (has links)
No studies have been conducted to explore the influence of stress caused by uncontrolled weeds on traits associated with drought tolerance. Two hypotheses were tested: 1) Delaying weed control would lengthen the anthesis-silking interval (ASI) in both a drought tolerant and non-drought tolerant maize hybrid and 2) The presence of drought tolerance genetics comes at a physiological cost, resulting in greater yield reductions under weedy conditions. Field studies were conducted to compare the response of a drought tolerant hybrid with its non-drought tolerant near-isoline to seven weed control timings. There was no treatment by hybrid interaction at any site-year for any parameters evaluated. Delaying weed control reduced height, leaf number, biomass, kernel number and grain yield and lengthened ASI for both hybrids. The drought tolerant hybrid had a shorter ASI, a lower kernel number and higher kernel weight. No yield differences were observed between hybrids at any weed control timing. / Natural Science and Engineering Research Council of Canada (File CRDPJ 425128-11), Syngenta Crop Protection Inc. and Ontario Ministry of Agriculture, Food, and Rural Affairs
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Impact of soil moisture stress at different phases of corn growth and developmentVennam, Ranadheer Reddy 08 August 2023 (has links) (PDF)
Suboptimal soil moisture during the growing season often limits growth and yield potential of corn. This study aimed to assess the impact of varying soil moisture regimes on corn growth at different growth phases involving vegetative, flowering, and grain-filling stages. Exposure to moisture stress (80% of the control) during the vegetative stage resulted in a 65% reduction in stomatal conductance and increased the canopy temperature by 5 oC, which led to a substantial decrease in total dry matter (56%). Moisture stress-induced reductions in silk length (19%) and fresh weight (34%), negatively affected kernel number (53%), and weight (54%). Unlike the flowering stage, extreme stress during grain-filling had a greater impact on kernel weight (19%) than the number (7%). During flowering, stress reduced kernel starch content with an increase in protein content. Our findings infer that improving the resilience of the corn flowering stage to soil moisture stress may help reduce the yield gap between irrigated and rainfed.
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Maissorten für den ökologischen Landbau - Unkrauttolerante Maishybriden und blühbiologische Untersuchungen zur Entwicklung offen abblühender Maissorten / Maize cultivars for organic farming - Weedtolerant maize hybrids and flowering intervall studies for the development of open-pollinating maize cultivarsStever, Mareile 04 July 2017 (has links)
No description available.
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