Table 1 Impact of weather and irrigation on log wheat yield

From: The role of irrigation in changing wheat yields and heat sensitivity in India

Dependent variable:
Log wheat yield
(1) (2) (3) (4) (5) (6) (7) (8) (9)
EDD [30 + ] (10 days) −0.0243*** −0.0249*** −0.0216*** −0.0220*** −0.0241*** −0.0196*** −0.0575*** −0.0449*** −0.0550***
(0.003) (0.004) (0.004) (0.004) (0.004) (0.002) (0.008) (0.008) (0.008)
GDD [0, 30] (10 days)   −0.0001 −0.0001 −0.0002 −0.0003 0.0000 −0.0015 0.0007 −0.0016
  (0.001) (0.001) (0.001) (0.001) (0.000) (0.001) (0.001) (0.001)
Precip (10 mm)    0.0010*** 0.0008*** 0.0008*** 0.0013*** 0.0012* 0.0014** 0.0053***
   (0.000) (0.000) (0.000) (0.000) (0.001) (0.001) (0.001)
Rainy days     0.0010** 0.0010*** 0.0003 0.0015 0.0009 0.0013
    (0.000) (0.000) (0.000) (0.001) (0.001) (0.001)
Share irrigation      0.4493*** 0.5564*** 0.0339 0.7749 0.1843
     (0.084) (0.091) (0.410) (0.488) (0.419)
Precip Sq.          −0.0002***
         (0.000)
EDD [30+] × Share irrigation        0.0411*** 0.0316*** 0.0390***
       (0.008) (0.009) (0.008)
GDD [0, 30] × Share irrigation        0.0011 −0.0011 0.0012
       (0.001) (0.002) (0.001)
Precip × Share irrigation        −0.0005 −0.0001 −0.0043***
       (0.001) (0.001) (0.002)
Rainy days × Share irrigation        −0.0006 −0.0009 −0.0005
       (0.002) (0.002) (0.002)
Precip Sq x Share irrigation          0.0002***
         (0.000)
Observations 7661 7661 7661 7661 7661 7661 7661 7661 7661
Impact of EDD under Full irrigation        −0.016 −0.013 −0.016
P value        0.000 0.000 0.000
Adj. Rsq 0.906 0.906 0.907 0.907 0.913 0.894 0.914 0.895 0.915
RMSE 0.159 0.159 0.158 0.158 0.153 0.169 0.151 0.168 0.151
  1. Notes: Dependent variable is the logarithm of wheat yield. Each column represents a separate regression model. Standard errors are displayed in parentheses and are clustered at the district-level. All models include district fixed effects and state-specific linear time trends. Columns 1–5, 7 and 9 also include year fixed effects. In column 9, a quadratic precipitation term is added
  2. Stars indicate statistical significance: *p ≤ 0.1, **p ≤ 0.05, ***p ≤ 0.01