Author: Francisco Antonio Mombiela-MuruzabalPublisher:
ISBN:
Category :
Languages : en
Pages : 180
Book Description
Evaluation of Current Fertilizer Recommendation Procedures Using Simulated Corn P Response Data
Author: Francisco Antonio Mombiela-MuruzabalPublisher:
ISBN:
Category :
Languages : en
Pages : 180
Book Description
Evaluation of Fertilizer Recommendation Methodologies Using Simulated Corn P Responses in North Carolina Norfolk-like Soils with Varying Soil P Fertility
Author: Francisco A. MombielaPublisher:
ISBN:
Category : Crops and soils
Languages : en
Pages : 88
Book Description
Evaluation of fertilizer recommendation methodologies using simulated corn P responses in North Carolina Norfolk-Like soils with varying soil fertility
Author: F. A. MombielaEvaluation of fertilizer recommendation methodologies using simulated corn P responses in North Carolina Norfolk-like soils with varying soil P fertility
Author: Evaluation of Fertilizer Recommandation Methodologies Using Simulated Corn P Responses in North Carolina Norfolk-like Soils with Varying Soil P Fertility
Author: F. A. MombielaDissertation Abstracts International
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 816
Book Description
Evaluating and Improving Corn Nitrogen Fertilizer Recommendation Tools Across the U.S. Midwest
Author: Curtis Joel RansomPublisher:
ISBN:
Category :
Languages : en
Pages : 208
Book Description
Determining which corn (Zea mays L.) nitrogen (N) recommendation tools best predict the economically optimal N rate (EONR) would be valuable for maximizing profits and minimizing environmental consequences. The objectives of this research were to evaluate the performance of publicly-available N fertilizer recommendation tools across a wide range of soil and weather environments for 1) prescribing EONR for planting and split N fertilizer applications, 2) improve understanding of the economic and environmental impact of these tools, 3) improve N recommendation tools by integrating soil and weather information, and 4) improve N recommendation tools by combing multiple tools. The evaluation was conducted on 49 N response trials that spanned eight states and three growing seasons. Soil and plant samples, weather, and management information were collected using standardized procedures to allow for a side-by-side comparison of tools. Tool N recommendations were for fertilizer applications either atplanting or an inseason applied at V9 corn development stage. Only 11of 31 tool recommendations were weakly related to EONR (P [greater than or equal to] 0.10 and r2 [greater than or equal to] 0.24). These tools related to EONR resulted in only 21-47% of sites within [both plus and minus operations] 30 kg N ha-1 of EONR. When considering partial profit for these 11 tools the average profitability relative to EONR range from -$56 to -155 ha-1. An environmental assessment of these 11 tools found there was no difference found between tools, with environmental costs ranging from -$49 to 55 ha-1 relative to EONR. Using an elastic net regression model to incorporate soil and weather information helped to improve six N recommendation tools. This improvement resulted in a stronger linear relationship with EONR (r2 [greater than or equal to] 0.20 but [less than or equal to] 0.39; P
Comprehensive Dissertation Index
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 992
Book Description
American Doctoral Dissertations
Author: Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 604
Book Description
Flux and Sources of Nutrients in the Mississippi-Atchafalaya River Basin
Author: Publisher:
ISBN:
Category : Marine eutrophication
Languages : en
Pages : 152
Book Description