In this study we examined the impact on soil C, total soil N and available P of six rotations namely: long season tobacco cultivar ‘KM10’ grown continuously (ContKM10), medium season tobacco cultivar ‘RK8’ grown continuously (ContRK8), grass-grass-grass-KM10 (G-G-G-KM10),...

We examine the economic impact of high-yielding crop varieties (HYVs) in developing countries 1960-2000. We use time variation in the development and diffusion of HYVs of 10 major crops, spatial variation in agro-climatically suitability for growing them, and a differences-in-differences...

We examine the economic impact of high-yielding crop varieties (HYVs) in developing countries 1960-2000. We use time variation in the development and diffusion of HYVs of 10 major crops, spatial variation in agro-climatically suitability for growing them, and a differences-in-differences...

Research on land tenure and use control and the socioeconomic sets of regulations in the agricultural rainfed sub sector of Sudan, come to focus for many reasons. Anthropogenic pressure, expanding animal population and migration led to accelerated impacts on both the ecological systems and land...

When the production or use of a product imposes a cost on a third party, this is referred to as a negative external cost. Negative external costs of pesticides are associated with social costs. However, there is still a lack of a systematic method for evaluating and internalize negative external...