Type of Document Master's Thesis Author Gabrielyan, Gnel Author's Email Address email@example.com URN etd-11182010-014225 Title Factors Affecting Adoption of Cover Crops and Its Effect on Nitrogen Use by Producers Degree Master of Science (M.S.) Department Agricultural Economics & Agribusiness Advisory Committee
Advisor Name Title Westra, John V. Committee Chair Gillespie, Jeffrey M. Committee Member Kazmierczak, Richard F. Committee Member Keywords
- cover crop adoption
- nitrogen use
Date of Defense 2010-08-06 Availability unrestricted AbstractIncreasing environmental concerns, population, and changing preferences of consumers towards healthier foods, and agronomic practices have all aligned to provide not only food and fiber, but also sustainable practices useful to the environment. Cover crops, a type of agricultural technology, provide private and public benefits, which are vital for organic production.
The objectives of this study are: 1) Identify determinants of cover crop adoption; 2) analyze how nitrogen management varies by farm relative to adoption or non-adoption of this technology; 3) estimate the change in the probability of adoption of cover crops due to farm, regional and operator characteristics by non-adopters; and 4) estimate the change in intensity in nitrogen use by cover crop adopters due to farm, regional, and operator characteristics.
To address our objectives, we developed a two-stage simultaneous equation model where the first stage provides information on the factors affecting adoption of cover crops using a probit model. To better understand the effects of cover crops on the amount of nitrogen use by producers we use a left-censored tobit model and incorporated the adoption of cover crops as an endogenous variable. To estimate the intensity of the effect of adoption of cover crops, we used the McDonald and Moffitt (1980) decomposition of the marginal effects.
The results of the probit model showed that producerís age, experience, experience squared, all conservative payments, using other producers (who grow cover crops) and organic fertilizer dealers as information sources when making nitrogen management decisions had a significant effect on cover-crop adoption. The results of the tobit model showed econometrically that cover crop adoption had a significant effect on nitrogen use by producers. Three other variables that had a significant effect on nitrogen use by producers were field slope of 12% or more, rented field, and off-farm work.
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