Barraclough, P. B. and Haynes, J. 1996. The effect of foliar supplements of potassium nitrate and urea on the yield of winter wheat. Fertilizer Research. 44, pp. 217-223.
Whitmore, A. P., Coleman, K., Bradbury, N. J. and Addiscott, T. M. 1991. Simulation of nitrogen in soil and winter wheat crops: modelling nitrogen turnover through organic matter. Fertilizer Research. 27, pp. 283-291. https://doi.org/10.1007/BF01051134
Addiscott, T. M., Bailey, N. J., Bland, G. J. and Whitmore, A. P. 1991. Simulation of nitrogen in soil and winter wheat crops: a management model that makes best use of limited information. Fertilizer Research. 27, pp. 305-312. https://doi.org/10.1007/BF01051136
Pruden, G., Powlson, D. S. and Jenkinson, D. S. 1985. The measurement of N-15 in soil and plant-material. Fertilizer Research. 6 (3), pp. 205-218. https://doi.org/10.1007/bf01048795
Greenwood, D. J., Draycott, A., Last, P. J. and Draycott, A. P. 1984. A concise simulation-model for interpreting n-fertilizer trials. Fertilizer Research. 5 (4), pp. 355-369. https://doi.org/10.1007/bf01049116
Rodgers, G. A. 1983. Effect of dicyandiamide on ammonia volatilization from urea in soil. Fertilizer Research. 4 (4), pp. 361-367. https://doi.org/10.1007/bf01054009