TY - JOUR
T1 - Sequential adoption of site-specific technologies and its implications for nitrogen productivity
T2 - A double selectivity model
AU - Khanna, Madhu
N1 - Funding Information:
This res earch was s upported by a grant from the Illinois Council for Food and Agricultural Research.
PY - 2001
Y1 - 2001
N2 - This paper analyzes the sequential decision to adopt two site-specific technologies, soil testing and variable rate technology, and the impact of adoption on nitrogen productivity. The results indicate that while farm location was a key variable influencing adoption of soil testing, farm size, human capital, and innovativeness of farmers had a significant impact on adoption of variable rate technology in four Midwestern states. A double selectivity model applied to correct for sample selection bias shows that adoption leads to significant gains in nitrogen productivity for farms with below average soil quality but statistically insignificant gains for farms with above average soil quality.
AB - This paper analyzes the sequential decision to adopt two site-specific technologies, soil testing and variable rate technology, and the impact of adoption on nitrogen productivity. The results indicate that while farm location was a key variable influencing adoption of soil testing, farm size, human capital, and innovativeness of farmers had a significant impact on adoption of variable rate technology in four Midwestern states. A double selectivity model applied to correct for sample selection bias shows that adoption leads to significant gains in nitrogen productivity for farms with below average soil quality but statistically insignificant gains for farms with above average soil quality.
KW - Bivariate probit
KW - Midwest
KW - Self-selection
KW - Soil testig
KW - Spatial variability
KW - Variable rate technology
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U2 - 10.1111/0002-9092.00135
DO - 10.1111/0002-9092.00135
M3 - Article
AN - SCOPUS:0035060913
SN - 0002-9092
VL - 83
SP - 35
EP - 51
JO - American Journal of Agricultural Economics
JF - American Journal of Agricultural Economics
IS - 1
ER -