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A Model for Making Field-Based Nitrogen Recommendations For Winter Wheat in Western Oregon

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dc.contributor.author DOST MOHAMMAD BALOCH
dc.contributor.author MAQSOOD AHMED KHAN
dc.contributor.author EHSANULLAH KAKAR
dc.contributor.author MOHAMMAD AYAZ KHAN MALG HANI
dc.date.accessioned 2023-10-27T04:41:25Z
dc.date.available 2023-10-27T04:41:25Z
dc.date.issued 2010-04-04
dc.identifier.citation Baloch, D. M., Malghani, M. A., Khan, M. A., & Kakar, E. H. S. A. N. U. L. L. A. H. (2010). A model for making field-based nitrogen recommendations for winter wheat in Western Oregon. Journal of the Chemical Society of Pakistan, 32. en_US
dc.identifier.issn 0253-5106
dc.identifier.uri http://142.54.178.187:9060/xmlui/handle/123456789/19881
dc.description.abstract A model based on early spring soil and tissue analysis was developed and evaluated for predicting the need for additional nitrogen (N) fertilizer on winter wheat. To develop the model, On-farm trials were established over three years 1994-95 in grower’s fields at three different locations across the Willamette Valley of western Oregon. Two field-scale validation trials were run in 1996-97. Rotations were soft white winter wheat following grass seed, sweet corn or a legume. Four treatments, including a check receiving no nitrogen, were used at each site. At the site where wheat followed corn, the predicted optimum N rate was 168 kg N ha⁻¹; however, the 112 kg N ha⁻¹ rate was the optimum rate predicted by the developed model. The 84 kg N ha⁻¹ and 140 kg N ha⁻¹ rates were selected to bracket the recommended rate (± 28 kg N ha⁻¹).Wheat following grass seed had high soil supplied N which depressed the yield even at moderate fertilizer N rates. The model overall accurately assess field-specific optimum fertilizer N status. en_US
dc.description.sponsorship The chemical society of Pakistan is an approved society from the PSF. en_US
dc.language.iso en en_US
dc.publisher HEJ Research Institute of Chemistry, University of Karachi, Karachi. en_US
dc.title A Model for Making Field-Based Nitrogen Recommendations For Winter Wheat in Western Oregon en_US
dc.type Article en_US


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