1. Abdul, K., Chemining'wa, G. N., & Onwonga, R. N. (2012). Relationships between agronomic practices, soil chemical characteristics and Striga reproduction in Dryland areas of Tanzania. Journal of Agricultural Science and Technology, 2(10A), 1134–1141.
2. Ae, N., Arihara, J., Okada, K., Yoshihara, T., Otani, T., & Johansen, C. (1993). The role of piscidic acid secreted by pigeon pea roots grown in an Alfisol with low-P fertility. In P. J. Randall, E. Delhaize, R. A. Richards, & R. Munns (Eds.), Genetic aspects of plant mineral nutrition (pp. 279–288). Canberra: Springer.
3. Ajayi, O. C., & Kwesiga, F. (2003). Implications of local policies and institutions on the adoption of improved fallows in eastern Zambia. Agroforestry Systems, 59(3), 327–336.
4. Anderson, J. R., & Feder, G. (2004). Agricultural extension: Good intentions and hard realities. The World Bank Research Observer, 19(1), 41–60.
5. Árvai, J., Kellon, D., León, R., Gregory, R., & Richardson, R. (2014). Structuring international development decisions: Confronting trade-offs between land use and community development in Costa Rica. Environment Systems and Decisions, 34(2), 224–236.