Experiments comparing concentrated and dilute NPK fertilizers and four nitrogen fertilizers on a range of crops

Widdowson, F. V., Penny, A. and Williams, Rodney (1965) Experiments comparing concentrated and dilute NPK fertilizers and four nitrogen fertilizers on a range of crops. The Journal of Agricultural Science, 65 (1). pp. 45-55. 10.1017/S002185960008535X
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