temperature in autumn and minimum temperature in summer has negative relation
to the yield of sugarcane. Unlike shown by the earlier studies, like Ramulu (1996)
for sugar production in Andhra Pradesh and Ajay Kumar et al. (2014) for a study of
13 states in India, the results shows that it may not be the rainfall in winter alone
that is affecting the yield of sugarcane production in Karnataka, but the rainfall in
summer is also significant and has a positive relationship to the sugarcane yield.
The climatic variables with respect to minimum and maximum temperatures in
different seasons have a very significant impact on the yield of sugarcane and this
study points out the varying impacts of these variables in different seasons on the
sugarcane productivity.
The non-climatic variables—fertilizer consumption and area under irrigation are
both significant and has a positive relationship with sugarcane yield. Some studies
direct us to the negative impact of fertilizers on sugarcane production (Ranuzzi and
Srivastava 2012; Kumar and Sharma 2014), but this trend cannot be observed in the
case of Karnataka and more fertilizer use in sugarcane production will increase the
yield in the state.
Changes in the characteristics of seasons, a result of the climate change, has a
profound impact on the yield of sugarcane in Karnataka. An increase of 1 °C in
average maximum temperature in the autumn months (the months after the monsoon season), will decrease the sugarcane productivity by 0.9 tonne/ha. An increase
in average minimum temperature in monsoon and autumn seasons has a positive
impact on the yield of sugarcane, whereas an increase in average minimum temperature in summer has a negative relationship on the sugarcane yield.
Table 2 The results of Fixed effects and Prais–Winsten Model
Variables
Fixed effects model
Prais–Winsten model
Fertilizer
8.46e−06***
8.69e−06**
Area under irrigation
0.0091654*
0.0114791***
Maximum temperature winter
−0.1474754
−0.281132
Maximum temperature summer
−0.9600607
0.6765891**
Maximum temperature monsoon
−0.8553481
−0.0056137
Maximum temperature autumn
−2.230395***
−0.839848***
Minimum temperature winter
0.1471964
0.5674326*
Minimum temperature summer
0.7787901
−1.054065***
Minimum temperature monsoon
2.162654***
0.5802172*
Minimum temperature autumn
1.787407***
0.3682153
Rainfall winter
0.0054152
0.0218034
Rainfall summer
0.0029156**
0.002192
Rainfall monsoon
0.0006462
0.0007406
Rainfall autumn
0.0014021
0.0036235
Constant
31.45268**
11.98454***
R
2
0.1178
0.2057
*** indicates significance at 1 % level of probability, ** indicates significance at 5 % and *
indicates significance at 10 % level of probability
396
A.B. Chandran and K.N. Anushree
to the yield of sugarcane. Unlike shown by the earlier studies, like Ramulu (1996)
for sugar production in Andhra Pradesh and Ajay Kumar et al. (2014) for a study of
13 states in India, the results shows that it may not be the rainfall in winter alone
that is affecting the yield of sugarcane production in Karnataka, but the rainfall in
summer is also significant and has a positive relationship to the sugarcane yield.
The climatic variables with respect to minimum and maximum temperatures in
different seasons have a very significant impact on the yield of sugarcane and this
study points out the varying impacts of these variables in different seasons on the
sugarcane productivity.
The non-climatic variables—fertilizer consumption and area under irrigation are
both significant and has a positive relationship with sugarcane yield. Some studies
direct us to the negative impact of fertilizers on sugarcane production (Ranuzzi and
Srivastava 2012; Kumar and Sharma 2014), but this trend cannot be observed in the
case of Karnataka and more fertilizer use in sugarcane production will increase the
yield in the state.
Changes in the characteristics of seasons, a result of the climate change, has a
profound impact on the yield of sugarcane in Karnataka. An increase of 1 °C in
average maximum temperature in the autumn months (the months after the monsoon season), will decrease the sugarcane productivity by 0.9 tonne/ha. An increase
in average minimum temperature in monsoon and autumn seasons has a positive
impact on the yield of sugarcane, whereas an increase in average minimum temperature in summer has a negative relationship on the sugarcane yield.
Table 2 The results of Fixed effects and Prais–Winsten Model
Variables
Fixed effects model
Prais–Winsten model
Fertilizer
8.46e−06***
8.69e−06**
Area under irrigation
0.0091654*
0.0114791***
Maximum temperature winter
−0.1474754
−0.281132
Maximum temperature summer
−0.9600607
0.6765891**
Maximum temperature monsoon
−0.8553481
−0.0056137
Maximum temperature autumn
−2.230395***
−0.839848***
Minimum temperature winter
0.1471964
0.5674326*
Minimum temperature summer
0.7787901
−1.054065***
Minimum temperature monsoon
2.162654***
0.5802172*
Minimum temperature autumn
1.787407***
0.3682153
Rainfall winter
0.0054152
0.0218034
Rainfall summer
0.0029156**
0.002192
Rainfall monsoon
0.0006462
0.0007406
Rainfall autumn
0.0014021
0.0036235
Constant
31.45268**
11.98454***
R
2
0.1178
0.2057
*** indicates significance at 1 % level of probability, ** indicates significance at 5 % and *
indicates significance at 10 % level of probability
396
A.B. Chandran and K.N. Anushree