{"id":{"repo_id":"missouri","oai_identifier":"oai:mospace.umsystem.edu:10355/109284"},"canonical_url":"https://search.dev.ndltd.org/etd/missouri/oai:mospace.umsystem.edu:10355/109284","repository":{"repo_id":"missouri","name":"University of Missouri","base_url":"https://mospace.umsystem.edu/oai/request"},"display":{"title":"Hill reaction and frost hardening in cabbage","abstract":"\"The Problem. How often have men stopped and wondered at seeing plants surviving and struggling against temperature extremes which to all appearances have killed and destroyed other plants next to them? What inherent or developed ability is this that allows some to survive even when ice crystals were deposited on the leaves during early morning frosts? These are searching questions and without doubt have and deserve careful answers. Answers to these questions do not come readily, rather, they are found after laborious searching. Even the Greek philosophers such as Aristotle asked themsleves these very same questions and though erroneous in arriving at what they believed to be true answers they tried to describe what they saw (Levitt, 1956). A simple terminology has been coined to describe those plants which appear to defy nature in its winter guise. Plants able to withstand freezing and sub-freezing temperatures are termed frost hardy. It then follows that plants which are not able to withstand these temperature extremes are not frost hardy or are non-hardy.\"--Page 1.","abstract_html":""The Problem. How often have men stopped and wondered at seeing plants surviving and struggling against temperature extremes which to all appearances have killed and destroyed other plants next to them? What inherent or developed ability is this that allows some to survive even when ice crystals were deposited on the leaves during early morning frosts? These are searching questions and without doubt have and deserve careful answers. Answers to these questions do not come readily, rather, they are found after laborious searching. Even the Greek philosophers such as Aristotle asked themsleves these very same questions and though erroneous in arriving at what they believed to be true answers they tried to describe what they saw (Levitt, 1956). A simple terminology has been coined to describe those plants which appear to defy nature in its winter guise. Plants able to withstand freezing and sub-freezing temperatures are termed frost hardy. It then follows that plants which are not able to withstand these temperature extremes are not frost hardy or are non-hardy."--Page 1.","abstract_has_math":false,"creators":["Ashford, Norman Guy"],"institution":"University of Missouri--Columbia","degree_name":"Ph. D.","degree_level":"Doctoral","degree_discipline":"Botany (MU)","degree_department":null,"school":null,"contributors":[],"advisors":["Levitt, Jacob"],"committee_chairs":[],"committee_members":[],"year":1969,"date_issued":"1969","date_published":"1969","updated_at":"2026-07-24T03:08:32Z","subjects":[],"languages":["eng","English"],"rights":["OpenAccess."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10355/109284","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Levitt, Jacob"]},{"key":"dc:creator","label":"Author","values":["Ashford, Norman Guy"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-08-07T15:31:22Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-08-07T15:31:22Z"]},{"key":"dc:date.issued","label":"Date","values":["1969"]},{"key":"dc:publisher","label":"Institution","values":["University of Missouri--Columbia"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Botany (MU)"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph. 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What inherent or developed ability is this that allows some to survive even when ice crystals were deposited on the leaves during early morning frosts? These are searching questions and without doubt have and deserve careful answers. Answers to these questions do not come readily, rather, they are found after laborious searching. Even the Greek philosophers such as Aristotle asked themsleves these very same questions and though erroneous in arriving at what they believed to be true answers they tried to describe what they saw (Levitt, 1956). A simple terminology has been coined to describe those plants which appear to defy nature in its winter guise. Plants able to withstand freezing and sub-freezing temperatures are termed frost hardy. It then follows that plants which are not able to withstand these temperature extremes are not frost hardy or are non-hardy.\"--Page 1."]},{"key":"dc:source","label":"Dc Source","values":["Digitized a department copy."]},{"key":"dc:title","label":"Title","values":["Hill reaction and frost hardening in cabbage"]}]}],"canonical_facts":{"dc:contributor.advisor":["Levitt, Jacob"],"dc:creator":["Ashford, Norman Guy"],"dc:date.accessioned":["2025-08-07T15:31:22Z"],"dc:date.available":["2025-08-07T15:31:22Z"],"dc:date.issued":["1969"],"dc:description":["Includes vita."],"dc:description.abstract":["\"The Problem. How often have men stopped and wondered at seeing plants surviving and struggling against temperature extremes which to all appearances have killed and destroyed other plants next to them? What inherent or developed ability is this that allows some to survive even when ice crystals were deposited on the leaves during early morning frosts? These are searching questions and without doubt have and deserve careful answers. Answers to these questions do not come readily, rather, they are found after laborious searching. Even the Greek philosophers such as Aristotle asked themsleves these very same questions and though erroneous in arriving at what they believed to be true answers they tried to describe what they saw (Levitt, 1956). A simple terminology has been coined to describe those plants which appear to defy nature in its winter guise. Plants able to withstand freezing and sub-freezing temperatures are termed frost hardy. 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