{"id":{"repo_id":"vt","oai_identifier":"oai:vtechworks.lib.vt.edu:10919/101485"},"canonical_url":"https://search.dev.ndltd.org/etd/vt/oai:vtechworks.lib.vt.edu:10919/101485","repository":{"repo_id":"vt","name":"Virginia Tech","base_url":"https://vtechworks.lib.vt.edu/oai/request"},"display":{"title":"Phosphorus and nitrogen metabolism in soybeans as influenced by potassium","abstract":"The effect of K on P and N metabolism in soybean seedlings, Glycine max, Var. Dorman, was studied in two greenhouse experiments. Yield, nutrient uptake and changes in the distribution of cellular P and N compounds served as criteria for evaluating K effects. The yield increased exponentially with time regardless of K treatments; however, increasing K levels increased the rate of yield accumulation. Phosphorus uptake was not associated with K levels. An increase in N uptake was associated with increased dry matter production rather than K levels, per se. An inverse relationship was found between per cent P and K levels. This was attributed to a dilution effect due to the increased yield with increasing K levels. An extraction-time study on the lipid-free soybean leaf residue with 1N KOH, showed that essentially all of the extractable P and N was extracted within 45 and 60 minutes, respectively. Longer extraction times caused gradual protein hydrolysis. Norit-A adsorbed P:N ratios were used to indirectly estimate the relative changes in poly-nucleotide-P (ATP and ADP) associated with K levels and ortho-P accumulation; indicating that K functions either directly or indirectly in the esterification of inorganic-P in coupled oxidative phosphorylation. From the data presented, it was concluded that under a general K stress, P metabolism exhibited a priority over N metabolism for K. Based on these data, K was found to function in the following metabolic processes: (l) peptide-protein synthesis, (2) nucleic acid base synthesis, and (3) esterification of inorganic-P.","abstract_html":"The effect of K on P and N metabolism in soybean seedlings, Glycine max, Var. Dorman, was studied in two greenhouse experiments. Yield, nutrient uptake and changes in the distribution of cellular P and N compounds served as criteria for evaluating K effects. The yield increased exponentially with time regardless of K treatments; however, increasing K levels increased the rate of yield accumulation. Phosphorus uptake was not associated with K levels. An increase in N uptake was associated with increased dry matter production rather than K levels, per se. An inverse relationship was found between per cent P and K levels. This was attributed to a dilution effect due to the increased yield with increasing K levels. An extraction-time study on the lipid-free soybean leaf residue with 1N KOH, showed that essentially all of the extractable P and N was extracted within 45 and 60 minutes, respectively. Longer extraction times caused gradual protein hydrolysis. Norit-A adsorbed P:N ratios were used to indirectly estimate the relative changes in poly-nucleotide-P (ATP and ADP) associated with K levels and ortho-P accumulation; indicating that K functions either directly or indirectly in the esterification of inorganic-P in coupled oxidative phosphorylation. From the data presented, it was concluded that under a general K stress, P metabolism exhibited a priority over N metabolism for K. Based on these data, K was found to function in the following metabolic processes: (l) peptide-protein synthesis, (2) nucleic acid base synthesis, and (3) esterification of inorganic-P.","abstract_has_math":false,"creators":["Henderlong, Paul Robert"],"institution":"Virginia Polytechnic Institute","degree_name":"Ph. D.","degree_level":"doctoral","degree_discipline":"Agronomy","degree_department":"Agronomy","school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1964,"date_issued":"1964","date_published":"1964","updated_at":"2026-07-22T22:20:26Z","subjects":[],"languages":["en"],"rights":["In Copyright"],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10919/101485","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.department","label":"Department","values":["Agronomy"]},{"key":"dc:creator","label":"Author","values":["Henderlong, Paul Robert"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2020-12-15T19:43:03Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2020-12-15T19:43:03Z"]},{"key":"dc:date.issued","label":"Date","values":["1964"]},{"key":"dc:publisher","label":"Institution","values":["Virginia Polytechnic Institute"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation"]},{"key":"dc:type.dcmitype","label":"Dc Type Dcmitype","values":["Text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Agronomy"]},{"key":"thesis:degree_level","label":"Degree Level","values":["doctoral"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph. 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The yield increased exponentially with time regardless of K treatments; however, increasing K levels increased the rate of yield accumulation. Phosphorus uptake was not associated with K levels. An increase in N uptake was associated with increased dry matter production rather than K levels, per se. An inverse relationship was found between per cent P and K levels. This was attributed to a dilution effect due to the increased yield with increasing K levels. An extraction-time study on the lipid-free soybean leaf residue with 1N KOH, showed that essentially all of the extractable P and N was extracted within 45 and 60 minutes, respectively. Longer extraction times caused gradual protein hydrolysis. Norit-A adsorbed P:N ratios were used to indirectly estimate the relative changes in poly-nucleotide-P (ATP and ADP) associated with K levels and ortho-P accumulation; indicating that K functions either directly or indirectly in the esterification of inorganic-P in coupled oxidative phosphorylation. From the data presented, it was concluded that under a general K stress, P metabolism exhibited a priority over N metabolism for K. Based on these data, K was found to function in the following metabolic processes: (l) peptide-protein synthesis, (2) nucleic acid base synthesis, and (3) esterification of inorganic-P."]},{"key":"dc:description.degree","label":"Dc Description Degree","values":["Ph. D."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Phosphorus and nitrogen metabolism in soybeans as influenced by potassium"]}]}],"canonical_facts":{"dc:contributor.department":["Agronomy"],"dc:creator":["Henderlong, Paul Robert"],"dc:date.accessioned":["2020-12-15T19:43:03Z"],"dc:date.available":["2020-12-15T19:43:03Z"],"dc:date.issued":["1964"],"dc:description.abstract":["The effect of K on P and N metabolism in soybean seedlings, Glycine max, Var. Dorman, was studied in two greenhouse experiments. Yield, nutrient uptake and changes in the distribution of cellular P and N compounds served as criteria for evaluating K effects. The yield increased exponentially with time regardless of K treatments; however, increasing K levels increased the rate of yield accumulation. Phosphorus uptake was not associated with K levels. An increase in N uptake was associated with increased dry matter production rather than K levels, per se. An inverse relationship was found between per cent P and K levels. This was attributed to a dilution effect due to the increased yield with increasing K levels. An extraction-time study on the lipid-free soybean leaf residue with 1N KOH, showed that essentially all of the extractable P and N was extracted within 45 and 60 minutes, respectively. Longer extraction times caused gradual protein hydrolysis. Norit-A adsorbed P:N ratios were used to indirectly estimate the relative changes in poly-nucleotide-P (ATP and ADP) associated with K levels and ortho-P accumulation; indicating that K functions either directly or indirectly in the esterification of inorganic-P in coupled oxidative phosphorylation. From the data presented, it was concluded that under a general K stress, P metabolism exhibited a priority over N metabolism for K. Based on these data, K was found to function in the following metabolic processes: (l) peptide-protein synthesis, (2) nucleic acid base synthesis, and (3) esterification of inorganic-P."],"dc:description.degree":["Ph. D."],"dc:format.mimetype":["application/pdf"],"dc:identifier.uri":["http://hdl.handle.net/10919/101485"],"dc:language.iso":["en"],"dc:publisher":["Virginia Polytechnic Institute"],"dc:rights":["In Copyright"],"dc:rights.uri":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:title":["Phosphorus and nitrogen metabolism in soybeans as influenced by potassium"],"dc:type":["Dissertation"],"dc:type.dcmitype":["Text"],"thesis:degree_discipline":["Agronomy"],"thesis:degree_level":["doctoral"],"thesis:degree_name":["Ph. D."],"thesis:institution_name":["Virginia Polytechnic Institute"]},"updated_at":"2026-07-22T22:20:26Z"}