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Full-Text Articles in Life Sciences
Farm Energy: Energy Consumption For Row Crop Production, H. Mark Hanna, John E. Sawyer, Dana Petersen
Farm Energy: Energy Consumption For Row Crop Production, H. Mark Hanna, John E. Sawyer, Dana Petersen
John E. Sawyer
This publication provides an overview of farm energy use related to corn and soybean production in Iowa. Three areas of row crop production--field operations, fertilizer and pesticide application, and artificial drying--are used to illustrate on-farm energy consumption.
Farm Energy: Energy Conservation In Corn Nitrogen Fertilization, John E. Sawyer, H. Mark Hanna, Dana Petersen
Farm Energy: Energy Conservation In Corn Nitrogen Fertilization, John E. Sawyer, H. Mark Hanna, Dana Petersen
John E. Sawyer
Optimum corn yields require nitrogen fertilization in most crop rotations, but the energy consumed during the production of nitrogen fertilizer is considerable. Learn more about maximizing economic, environmental, and energy returns for nitrogen and other fertilizers.
Using Manure Nutrients For Crop Production, John E. Sawyer, Antonio P. Mallarino
Using Manure Nutrients For Crop Production, John E. Sawyer, Antonio P. Mallarino
John E. Sawyer
Manure has characteristics that make nutrient management different and sometimes more complicated than fertilizer. Find out about manure nutrient availability for crops, manure nutrient supply, manure nutrient application recommendations, adjusting for manure nitrogen volatilization, and more.
Nutrient Deficiencies And Application Injuries In Field Crops, John E. Sawyer
Nutrient Deficiencies And Application Injuries In Field Crops, John E. Sawyer
John E. Sawyer
Color photos and descriptions aid in identifying nutrient deficiencies and injury due to fertilizer in order to accurately diagnose symptoms for corn, soybeans, alfalfa, and winter wheat.
Sensing Nitrogen Stress In Corn, John E. Sawyer
Sensing Nitrogen Stress In Corn, John E. Sawyer
John E. Sawyer
Water quality concerns and high N fertilizer prices have made more precise nitrogen management strategies important to improve efficiency and profitability. Get the details here.
Interpretation Of Soil Test Results, Antonio P. Mallarino, John E. Sawyer
Interpretation Of Soil Test Results, Antonio P. Mallarino, John E. Sawyer
John E. Sawyer
A detailed explanation on how to interpret soil test results to assist with soil nutrient recommendations.
Nitrogen Use In Iowa Corn Production, John E. Sawyer
Nitrogen Use In Iowa Corn Production, John E. Sawyer
John E. Sawyer
Nitrogen is essential for growth and reproduction of crops and is involved in many important plant biochemical processes. Nitrogen management is critical for optimal yields for corn production systems. This publication discusses long-term research done in Iowa and shows corn yields average about 60 bu/acre for continuous corn and 115 bu/acre for corn following soybean when corn is not fertilized. However, corn fertilized with N will easily yield 200 bu/acre or more. This means soil management and nitrogen fertilization practices, such as using economical optimum N rates, should be used to help optimize crop yields, use N efficiently, and enhance …
A General Guide For Crop Nutrient And Limestone Recommendations In Iowa, Antonio P. Mallarino, John E. Sawyer, Stephen K. Barnhart
A General Guide For Crop Nutrient And Limestone Recommendations In Iowa, Antonio P. Mallarino, John E. Sawyer, Stephen K. Barnhart
John E. Sawyer
Find phosphorus and potassium recommendations, micronutrient recommendations, and limestone recommendations for soils.
Also find soil test procedures and categories.
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
William Edwards
Includes advantages and disadvantages of custom hiring and information on estimating costs; includes worksheets.
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
William Edwards
Includes advantages and disadvantages of custom hiring and information on estimating costs; includes worksheets.
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
William Edwards
Includes advantages and disadvantages of custom hiring and information on estimating costs; includes worksheets.
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
Ag Decision Maker: Combine Ownership Or Custom Hire, William M. Edwards, H. Mark Hanna
William Edwards
Includes advantages and disadvantages of custom hiring and information on estimating costs; includes worksheets.