57 Symposium--Management Practices Inpact on Soil Nitrogen Conservation
Oral Session
Special SessionsIt has been known that crops are able to use only 50-70% of the applied N fertilizer. Residual soil N after crop harvest is lost through volatilization, leaching, denitrification, or greenhouse gas (N2O) emissions. Opportunities exist to improve crop N-use efficiency and reduce the environmental impact of N fertilization. This symposium will elucidate our current state of knowledge on N dynamics in agroecosystems. An increase in soil N storage can reduce N losses through leaching, volatilization, denitrification, surface runoff, erosion, and N2O emissions. Since N can also be mineralized from crop residue and soil, information on N storage and mineralization is needed to optimize N availability for crops , increase N-use efficiency, sustain crop yields and quality, and reduce N fertilization rate and the potential for N loss. Management practices are needed to conserve soil N and reduce N losses through soil processes. At the same time, a balance between N conservation and mineralization is also needed to optimize soil N availability that can sustain crop yields and quality and reduce the cost and rates of N fertilization. The objectives of this symposium are to: (1) discuss soil N conservation, N mineralization, and N balance, (2 reduce N fertilizer rates and improve N use efficiency, and (3) identify management practices that conserve soil N and reduce N losses.
Cosponsor(s):
Soil & Water Management & Conservation
Soil Fertility & Plant Nutrition
Nutrient Management & Soil & Plant Analysis
Soils & Environmental Quality
Agronomic Production Systems
Environmental Quality
Nutrients and Environmental Quality Community
Monday, November 3, 2014: 12:55 PM-3:45 PM
Long Beach Convention Center, Room 102A
Organizer:
Upendra M Sainju
Presider:
Upendra M Sainju
1:00 PM
1:20 PM
2:00 PM
2:15 PM
2:45 PM
3:00 PM
3:15 PM
3:30 PM