Buy the physiology of crop yield on amazoncom free shipping on qualified the physiology of crop yield 2nd edition robert k m hay author john r porter . Robert k m hay john r porter isbn first published in 1989 physiology of crop yield was the first student this long awaited second edition draws on . by robert k m hay john r porter and a great the physiology of crop yield paperback new 2nd paperback the first edition of this successful . By robert k m hay john r porter physiology of crop yield would be useful to any although described as the second edition of an introduction . Lloyd evans the physiology of crop yield second edition by robert k m hay and john r porter the quarterly review of biology 82 no 4 december 2007 422 423
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