Author : Upendra M. Sainju
Release : 2018
Genre : Science
Kind : eBook
Book Rating : /5 ( reviews)
GET EBOOK
Book Synopsis Agricultural Management Impact on Greenhouse Gas Emissions by : Upendra M. Sainju
Download or read book Agricultural Management Impact on Greenhouse Gas Emissions written by Upendra M. Sainju. This book was released on 2018. Available in PDF, EPUB and Kindle. Book excerpt: Management practices used on croplands to enhance crop yields and quality can contribute about 10-20% of global greenhouse gases (GHGs: carbon dioxide [CO2], nitrous oxide [N2O], and methane [CH4]). Some of these practices are tillage, cropping systems, N fertilization, organic fertilizer application, cover cropping, fallowing, liming, et cetera The impact of these practices on GHGs in radiative forcing in the earth's atmosphere is quantitatively estimated by calculating net global warming potential (GWP) which accounts for all sources and sinks of CO2 equivalents from farm operations, chemical inputs, soil carbon sequestration, and N2O and CH4 emissions. Net GWP for a crop production system is expressed as kg CO2 equinox ha−1 year.−1 Net GWP can also be expressed in terms of crop yield (kg CO2 equinox kg−1 grain or biomass yield) which is referred to as net greenhouse gas intensity (GHGI) or yield-scaled GWP and is calculated by dividing net GWP by crop yield. This article discusses the literature review of the effects of various management practices on GWP and GHGI from croplands as well as different methods used to calculate net GWP and GHGI. The paper also discusses novel management techniques to mitigate net CO2 emissions from croplands to the atmosphere. This information will be used to address the state of global carbon cycle.