WASET
    M. Khakbazan and  S. L. Scott and  H. C. Block and  C. D. Robins and  W. P. McCaughey,  Economic effects and Energy Use Efficiency of Incorporating Alfalfa and Fertilizer into Grass- Based Pasture Systems.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2009, vol. 25(1). 39 - 44
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/7052.