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ThesisItem Open Access EFFECT OF DIFFERENT CROP ROTATIONS ON NUTRIENT AVAILABILITY IN SOIL(PUNJAB AGRICULTURAL UNIVERSITY, LUDHIANA, 1989) JATINDER SINGH; BRAR, S.P.S.03052017_0004_0005_Abstract.pdfThesisItem Restricted The Sorption of cadmium in sewage irrigaed soils and its uptake by plants(Punjab Agricultural University, Ludhiana, 1982) Rana, Ramesh Pal; Kansal, B. DThesisItem Restricted Effect of N, Fym, town refuse and sewage water on heavey metal composition and yield of fodders and vegetables(Punjab Agricultural University, Ludhiana, 1981) Sharma, Vijay Kumar; Kansal, B. D