A Comparison of Land Productivity Based on Net Primary Production in Graves and Owen County, Kentucky

Authors: Aman Bhatta*, Kentucky State University, Buddhi Raj Gyawali, Phd, Kentucky State University, Jeremy Sandifer, Kentucky State University
Topics: Remote Sensing
Keywords: NPP, Farm Parcel, MODIS
Session Type: Poster
Day: 4/13/2018
Start / End Time: 5:20 PM / 7:00 PM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded


Kentucky State is known for its agriculture production. The agriculture productivity, though being multifactorial, can be reflected through biological yield from Net Primary Production (NPP). NPP is the amount of carbon uptake in an ecosystem after subtracting Plant Respiration from Gross Primary Productivity. Due to the change in farms enterprises and size during time period, the farm productivity is changing. Graves and Owen County from Central and Western Kentucky respectively were selected to compare the land productivity among small, medium and large farm parcels from 2002 to 2014. 1005 and 1017 farm parcels from graves and Owen County were selected. The annually assessed 500 meter NPP, obtained from MODIS Subset-NASA, was averaged for these parcels through zonal statistics as table and summarized into three land categories. The land productivity between small, medium and large farm parcels is similar within the same year 2002 and in 2014, but it is significantly changed by 2014 compared to 2002. The preliminary result shows that the land productivity is significantly increased by 80% for Owen County during this time period; however, it is significantly decreased by 40% in Graves County. Further study is needed to consider other factors like land fragmentation, harvesting indices, economic yield and management practices to compare this changes in land productivity for land owners.

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