{"doi":"10.2135/cropsci2009.08.0432","title":"Correlation between Soil pH, <i>Heterodera glycines</i> Population Densities, and Soybean Yield","abstract":"<jats:p>Soybean cyst nematode (<jats:italic>Heterodera glycines</jats:italic> Ichinohe) is the most damaging pathogen of soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] in the United States. Observations in fields suggest that high <jats:italic>H. glycines</jats:italic> population densities are associated with high soil pH, but <jats:italic>H. glycines</jats:italic> and soil pH have not been linked to soybean yield. The objective of our study was to assess the relationship between soil pH and <jats:italic>H. glycines</jats:italic> population densities and subsequent effect on yield. Experiments were conducted in Wisconsin from 1997 to 2000 and in Iowa from 1996 to 1998. Results were consistent among the experiments and showed a positive correlation between soil pH and <jats:italic>H. glycines</jats:italic> population densities and a negative correlation between yield and both soil pH and <jats:italic>H. glycines</jats:italic> population densities in both states. In the Wisconsin experiment, yield of both <jats:italic>H. glycines</jats:italic>–resistant and <jats:italic>H. glycines</jats:italic>–susceptible cultivars decreased as pH increased, but the decrease was less with <jats:italic>H. glycines</jats:italic>–resistant cultivars. Overall, results indicate that <jats:italic>H. glycines</jats:italic> population densities and the impact of nematode population densities on soybean yield are related to soil pH; however, the mechanism of these interactions is unknown.</jats:p>","journal":"Crop Science","year":2010,"id":670905,"datarank":1.2507467407553037,"base_score":3.332204510175204,"endowment":3.332204510175204,"self_citation_contribution":0.49983067652628066,"citation_network_contribution":0.7509160642290231,"self_endowment_contribution":0.49983067652628066,"citer_contribution":0.7509160642290231,"corpus_percentile":null,"corpus_rank":null,"citation_count":27,"citer_count":23,"citers_with_citation_signal":16,"citers_with_endowment":16,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1752621,"name":"G. L. Tylka","orcid":null,"position":1,"is_corresponding":false},{"id":1752622,"name":"A. Mallarino","orcid":null,"position":2,"is_corresponding":false},{"id":1752623,"name":"A. E. Macguidwin","orcid":null,"position":3,"is_corresponding":false},{"id":1752624,"name":"N. C. Koval","orcid":null,"position":4,"is_corresponding":false},{"id":1752625,"name":"C. R. Grau","orcid":null,"position":5,"is_corresponding":false},{"id":1752620,"name":"P. Pedersen","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Correlation between Soil pH, <i>Heterodera glycines</i> Population Densities, and Soybean Yield","abstract":"<jats:p>Soybean cyst nematode (<jats:italic>Heterodera glycines</jats:italic> Ichinohe) is the most damaging pathogen of soybean [<jats:italic>Glycine max</jats:italic> (L.) Merr.] in the United States. Observations in fields suggest that high <jats:italic>H. glycines</jats:italic> population densities are associated with high soil pH, but <jats:italic>H. glycines</jats:italic> and soil pH have not been linked to soybean yield. The objective of our study was to assess the relationship between soil pH and <jats:italic>H. glycines</jats:italic> population densities and subsequent effect on yield. Experiments were conducted in Wisconsin from 1997 to 2000 and in Iowa from 1996 to 1998. Results were consistent among the experiments and showed a positive correlation between soil pH and <jats:italic>H. glycines</jats:italic> population densities and a negative correlation between yield and both soil pH and <jats:italic>H. glycines</jats:italic> population densities in both states. In the Wisconsin experiment, yield of both <jats:italic>H. glycines</jats:italic>–resistant and <jats:italic>H. glycines</jats:italic>–susceptible cultivars decreased as pH increased, but the decrease was less with <jats:italic>H. glycines</jats:italic>–resistant cultivars. Overall, results indicate that <jats:italic>H. glycines</jats:italic> population densities and the impact of nematode population densities on soybean yield are related to soil pH; however, the mechanism of these interactions is unknown.</jats:p>","is_dataset_classified":null,"base_score":3.332204510175204,"endowment":3.332204510175204,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"19162232","pmcid":null,"openalex_id":"https://openalex.org/W1967663500","authors":[],"funders":[],"total_grants":0,"fwci":1.5402,"citation_percentile":0.84371778,"influential_citations":0,"citation_trend":[{"year":2012,"count":2},{"year":2013,"count":2},{"year":2014,"count":4},{"year":2015,"count":1},{"year":2016,"count":1},{"year":2017,"count":1},{"year":2018,"count":1},{"year":2019,"count":4},{"year":2020,"count":1},{"year":2021,"count":4},{"year":2022,"count":3},{"year":2023,"count":1},{"year":2025,"count":1},{"year":2026,"count":1}],"oa_status":"closed","license":"http://onlinelibrary.wiley.com/termsAndConditions#vor","oa_locations":[{"url":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2135%2Fcropsci2009.08.0432","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.2135/cropsci2009.08.0432","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/full-xml/10.2135/cropsci2009.08.0432","host_type":"publisher"},{"url":"https://acsess.onlinelibrary.wiley.com/doi/pdf/10.2135/cropsci2009.08.0432","host_type":"publisher"},{"url":"https://doi.org/10.2135/cropsci2009.08.0432","host_type":"journal"}],"fields_of_study":["Nematode management and characterization studies","Cassava research and cyanide","Soybean genetics and cultivation"],"mesh_terms":[],"keywords":["Heterodera","Soybean cyst nematode","Biology","Population","Agronomy","Yield (engineering)","Glycine","Cultivar","Population density","Nematode","Ecology","Genetics","Materials science","Demography"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life in Land"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-16T00:29:51.409575Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}