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Use of Plant Analysis in Determining the Critical Concentrations of Nutrients and Predicting Their Requirment for Potato (salanum Tuberosum L.).

Sharma Uttam Chand

出版	Punjab Agricultural University, Ludhiana Philosophy in Soil Science, 1985
URL	http://books.google.com.hk/books?id=9-i3XwAACAAJ&hl=&source=gbs_api