Author: Cristie LeAnne Edwards
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The appropriate management for phosphorus (P) fertilizer can have significant agronomic, economic, as well as environmental impact. Studies in Kansas have evaluated different management systems to determine best management practices (BMP). The first component of this dissertation is a comprehensive review of tillage system and P fertilizer placement interaction. This review included studies completed in the U.S. Midwest. Results of this review showed greater corn yields with conventional tillage and broadcast applications when soil test P levels (STP) were below 20 mg P kg−1. However, soybean yield was highest in no-till systems with broadcast P fertilizer applications. The second component if this dissertation was a long-term study conducted in Kansas to evaluate the effect of P fertilizer placement on corn and soybean production. Results showed that under strip-tillage, P fertilizer placement significantly affected corn growth, but, seldom resulted in yield response difference among placement methods. Phosphorus application as starter fertilizer at planting showed the most consistent yield response. In addition to the agronomic aspect of this study, the third component of this dissertation consisted of an economic analysis using partial budgets calculated using both fixed and varying prices and costs to compare management practices. With decreased application costs associated with deep banding in strip-tillage system, net returns are greater than broadcast applications. The highest net responses were observed with starter P fertilizer applications. The fourth component of this dissertation included a study evaluating the effects of chelated fertilizer on nutrients, such as P, Fe, Mn, and Zn in soybean. Results from our study showed that both ethylenediamine tetraacetic acid (EDTA)+P and hydroxyethyl ethylenediamine tetraacetic acid (HEDTA)+P resulted in greater concentrations and uptake of Fe and lower Mn uptake in soybean. However, the application of glucoheptonate (GCH)+P had no negative effect on Mn uptake compared to EDTA+P and HEDTA+P. Across locations, EDTA+P and HEDTA+P showed higher yield than GCH+P. The use of long-term studies and comprehensive reviews can provide a unique perspective and better understanding of the most appropriate BMPs for P fertilizer management. Many agronomic and environmental implications of P fertilizer management and the interactions with tillage systems and soils may only become noticeable after multiple years or in a variety of conditions.
Evaluation of Long-term Phosphorus Fertilizer Placement, Rate, and Source, and Research in the U.S. Midwest
Author: Cristie LeAnne Edwards
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The appropriate management for phosphorus (P) fertilizer can have significant agronomic, economic, as well as environmental impact. Studies in Kansas have evaluated different management systems to determine best management practices (BMP). The first component of this dissertation is a comprehensive review of tillage system and P fertilizer placement interaction. This review included studies completed in the U.S. Midwest. Results of this review showed greater corn yields with conventional tillage and broadcast applications when soil test P levels (STP) were below 20 mg P kg−1. However, soybean yield was highest in no-till systems with broadcast P fertilizer applications. The second component if this dissertation was a long-term study conducted in Kansas to evaluate the effect of P fertilizer placement on corn and soybean production. Results showed that under strip-tillage, P fertilizer placement significantly affected corn growth, but, seldom resulted in yield response difference among placement methods. Phosphorus application as starter fertilizer at planting showed the most consistent yield response. In addition to the agronomic aspect of this study, the third component of this dissertation consisted of an economic analysis using partial budgets calculated using both fixed and varying prices and costs to compare management practices. With decreased application costs associated with deep banding in strip-tillage system, net returns are greater than broadcast applications. The highest net responses were observed with starter P fertilizer applications. The fourth component of this dissertation included a study evaluating the effects of chelated fertilizer on nutrients, such as P, Fe, Mn, and Zn in soybean. Results from our study showed that both ethylenediamine tetraacetic acid (EDTA)+P and hydroxyethyl ethylenediamine tetraacetic acid (HEDTA)+P resulted in greater concentrations and uptake of Fe and lower Mn uptake in soybean. However, the application of glucoheptonate (GCH)+P had no negative effect on Mn uptake compared to EDTA+P and HEDTA+P. Across locations, EDTA+P and HEDTA+P showed higher yield than GCH+P. The use of long-term studies and comprehensive reviews can provide a unique perspective and better understanding of the most appropriate BMPs for P fertilizer management. Many agronomic and environmental implications of P fertilizer management and the interactions with tillage systems and soils may only become noticeable after multiple years or in a variety of conditions.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The appropriate management for phosphorus (P) fertilizer can have significant agronomic, economic, as well as environmental impact. Studies in Kansas have evaluated different management systems to determine best management practices (BMP). The first component of this dissertation is a comprehensive review of tillage system and P fertilizer placement interaction. This review included studies completed in the U.S. Midwest. Results of this review showed greater corn yields with conventional tillage and broadcast applications when soil test P levels (STP) were below 20 mg P kg−1. However, soybean yield was highest in no-till systems with broadcast P fertilizer applications. The second component if this dissertation was a long-term study conducted in Kansas to evaluate the effect of P fertilizer placement on corn and soybean production. Results showed that under strip-tillage, P fertilizer placement significantly affected corn growth, but, seldom resulted in yield response difference among placement methods. Phosphorus application as starter fertilizer at planting showed the most consistent yield response. In addition to the agronomic aspect of this study, the third component of this dissertation consisted of an economic analysis using partial budgets calculated using both fixed and varying prices and costs to compare management practices. With decreased application costs associated with deep banding in strip-tillage system, net returns are greater than broadcast applications. The highest net responses were observed with starter P fertilizer applications. The fourth component of this dissertation included a study evaluating the effects of chelated fertilizer on nutrients, such as P, Fe, Mn, and Zn in soybean. Results from our study showed that both ethylenediamine tetraacetic acid (EDTA)+P and hydroxyethyl ethylenediamine tetraacetic acid (HEDTA)+P resulted in greater concentrations and uptake of Fe and lower Mn uptake in soybean. However, the application of glucoheptonate (GCH)+P had no negative effect on Mn uptake compared to EDTA+P and HEDTA+P. Across locations, EDTA+P and HEDTA+P showed higher yield than GCH+P. The use of long-term studies and comprehensive reviews can provide a unique perspective and better understanding of the most appropriate BMPs for P fertilizer management. Many agronomic and environmental implications of P fertilizer management and the interactions with tillage systems and soils may only become noticeable after multiple years or in a variety of conditions.
Review of Phosphorus Control Measures in the United States and Their Effects on Water Quality
Author: David W. Litke
Publisher:
ISBN:
Category : Phosphatic fertilizers
Languages : en
Pages : 46
Book Description
Publisher:
ISBN:
Category : Phosphatic fertilizers
Languages : en
Pages : 46
Book Description
Summary of Phosphorus Research in the United States Relating to Soils and Fertilizers
Author: National Phosphorus Research Work Group
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 128
Book Description
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 128
Book Description
EPA-600/2
Author:
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 700
Book Description
Publisher:
ISBN:
Category : Environmental engineering
Languages : en
Pages : 700
Book Description
Agronomy Abstracts
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1348
Book Description
Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1348
Book Description
Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).
Agrindex
Assessment and Modeling of Soil Functions or Soil-Based Ecosystem Services: Theory and Applications to Practical Problems
Author: Philippe C. Baveye
Publisher: Frontiers Media SA
ISBN: 2889740315
Category : Science
Languages : en
Pages : 156
Book Description
Publisher: Frontiers Media SA
ISBN: 2889740315
Category : Science
Languages : en
Pages : 156
Book Description
Journal of Soil and Water Conservation
Author:
Publisher:
ISBN:
Category : Soil conservation
Languages : en
Pages : 818
Book Description
Vol. 25, no. 1 contains the society's Lincoln Chapter's Resource conservation glossary.
Publisher:
ISBN:
Category : Soil conservation
Languages : en
Pages : 818
Book Description
Vol. 25, no. 1 contains the society's Lincoln Chapter's Resource conservation glossary.
Soil and Recycling Management in the Anthropocene Era
Author: Gero Benckiser
Publisher: Springer Nature
ISBN: 3030518868
Category : Nature
Languages : en
Pages : 172
Book Description
This book discusses soil and recycling management in the Anthropocene era. Nitrogen shortage is one of nature’s most important productivity regulators, but since the advent of technical nitrogen fixation (TNF), biological nitrogen fixation (BNF) input has nearly doubled, particularly in grass and arable lands covering over 13 million km2 of the Earth’s surface. This book explores how monoculture grass, arable lands and forests are often over fertilized with TNF, animal slurries, sewage sludge, or municipally produced composts, and as a result, flora and fauna that have adapted to a nitrogen shortage in the soil will have to adjust to a surplus; those that are unable to adapt will disappear.
Publisher: Springer Nature
ISBN: 3030518868
Category : Nature
Languages : en
Pages : 172
Book Description
This book discusses soil and recycling management in the Anthropocene era. Nitrogen shortage is one of nature’s most important productivity regulators, but since the advent of technical nitrogen fixation (TNF), biological nitrogen fixation (BNF) input has nearly doubled, particularly in grass and arable lands covering over 13 million km2 of the Earth’s surface. This book explores how monoculture grass, arable lands and forests are often over fertilized with TNF, animal slurries, sewage sludge, or municipally produced composts, and as a result, flora and fauna that have adapted to a nitrogen shortage in the soil will have to adjust to a surplus; those that are unable to adapt will disappear.
A Catalog of Research in Aquatic Pest Control and Pesticide Residues in Aquatic Environments
Author: Smithsonian Science Information Exchange
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 376
Book Description
Publisher:
ISBN:
Category : Pesticides
Languages : en
Pages : 376
Book Description