STATISTICAL EVALUATION OF SOIL AND YIELD PROPERTIES IN LONG TERM FERTILIZER EXPERIMENTS
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Date
2014-07-25
Authors
KARTHIK KUMAR, V
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences GKVK, Bangalore
Abstract
Optimum fertilizer usage is a key factor in increasing agriculture production and
at the same time maintaining the soil fertility. Long term fertilizer experiments are
repositories of valuable information regarding the sustainability of intensive agriculture.
Hence, it was important to study the long term impact of fertilizer application on crop
yield along with the influence of weather parameters.
The 26 years data from 1987-2012 of soil properties and crop yield for the study
were collected from AICRP on LTFE and weather data was obtained from the weather
observatory center situated in the campus of GKVK, UAS, Bangalore.
The data was analysed using Multivariate analysis of variance technique in order
to see the differences, if any exist in the soil nutrients following the long term fertilizer
application on the same plots. The principal component regression analysis was adopted
as the ordinary regression analysis was found not suitable due to the presence of
Multicollinearity and hence, to understand the effect of different soil properties and the
influence of weather factors on the grain and straw yield in long term fertilizers
application.
The long term application of the same fertilizers had a significant effect on
available micro nutrient in the soil. Due to change in the soil properties and available
nutrients by applying fertilizers showed an impact on the grain and straw yield of the
crop studied. It was also seen different weather factors during different stages of crop
growth and development had different influence on the crop yield.
Description
Keywords
Agricultural Statistics