Table 3 Determinants of inorganic fertilizer and improved maize varieties adoption decisions
Variable | Inorganic fertilizer adoption | Improved maize varieties | Joint adoption | ||
|---|---|---|---|---|---|
Coefficient | Marginal effect | Coefficient | Marginal effect | Marginal effect | |
Technology Adoption | |||||
Manure | −0.79*** (-6.04) | −0.06***(-3.68) | 0.03 (0.31) | 0.07*** (4.23) | −0.06***(-3.53) |
Human and physical capital | |||||
Head’s age | −0.02** (-2.47) | 0.001 (1.34) | 0.001 (0.13) | −0.001 (-1.30) | −0.001(-1.03) |
Head's age Sq | 0.0002**(2.49) | −0.0001(-0.96) | |||
Head’s education | |||||
Primary | 0.1 (0.75) | −0.02 (-1.28) | 0.19**(1.97) | 0.02(1.15) | 0.04*(1.93) |
Secondary | 0.14 (0.84) | −0.03 (-1.53) | 0.28**(2.21) | 0.03(1.32) | 0.05**(2.10) |
Tertiary | 0.18 (0.73) | −0.02 (-0.71) | 0.24(1.29) | 0.02(0.55) | 0.05(1.48) |
Male head | 0.18 (1.24) | −0.01 (-0.70) | 0.18 (1.61) | 0.01(0.53) | 0.04*(1.92) |
Household size | −0.02 (-0.88) | −0.0001(-0.02) | −0.01 (-0.51) | 0.0005 (0.13) | −0.003(-0.93) |
Wage rate | −0.0002 (-0.09) | −0.00001 (-0.04) | 0.0003 (0.16) | −0.0002 (-0.10) | −0.00004(-0.13) |
Institutional factors | |||||
Credit access | 3.1*** (4.85) | 0.26*** (4.14) | −0.39 (-0.92) | −0.31*** (-4.60) | 0.20**(2.23) |
Secure tenure | −0.08 (-0.97) | −0.04***(-4.18) | 0.26*** (3.94) | 0.04*** (4.08) | 0.03**(2.33) |
Market distance | −0.04*** (-3.05) | −0.001(-0.52) | −0.01** (-2.17) | 0.001(0.99) | −0.01***(-3.42) |
Plot and soil characteristics | |||||
Fast-drained soils | 0.86*** (6.75) | 0.02(1.38) | 0.29*** (3.12) | −0.03 (-1.58) | 0.11***(6.44) |
Plot Size (acres) | 0.39*** (6.89) | 0.01(0.79) | 0.14*** (2.75) | −0.01(-1.59) | 0.05***(5.87) |
Plot size (acres) Sq. | −0.004***(-4.49) | 0.0004(0.18) | |||
Year 2007 | −0.14 (-1.55) | −0.03***(-2.83) | 0.14**(2.27) | 0.03***(2.82) | 0.01 (0.74) |
Production Risks | |||||
Expected yield | 0.004*** (11.60) | 0.0002*** (6.64) | 0.001*** (3.24) | −0.0002*** (-7.90) | 0.0004***(11.45) |
Variance | −3.63D−07*** (-2.57) | 1.32D (0.01) | −1.73D−07* (-1.94) | 6.01D−09 (0.46) | −5.47D-08***(-2.73) |
Means of time-varying variables | |||||
Mean head age | 0.002 (0.33) | 0.002(0.40) | |||
Mean acres | −0.26*** (-4.48) | −0.12**(-2.34) | |||
Mean wage | −0.002 (-0.58) | 0.003 (1.43) | |||
Mean household size | 0.03 (0.76) | 0.017 (0.62) | |||
Mean expected yield | 0.002*** (6.26) | 0.002***(7.59) | |||
Mean variance | −4.13D−07*(-1.79) | 5.96D−08(0.45) | |||
Intercept | −4.41*** (-12.64) | −1.87*** (-8.27) | |||
LR test (ρ = 0) | χ2(1) = 19.9*** | χ2(1) = 19.9*** | |||
No. of Observations | 2334 | 2334 | |||