Yadav, B.K.Kahlon, Pawandeep2020-02-102020-02-102019http://krishikosh.egranth.ac.in/handle/1/5810142739The present study was undertaken to assess different soil chemical and biological properties under cotton-wheat and rice-wheat cropping system in Sangat block of Bathinda district, Punjab. The soil samples were collected from surface soil (0-15cm) and sub-surface soil (15-30cm) using GPS location. The pH values of soils from both the cropping system was neutral to alkaline in reaction ranging higher under cotton-wheat cropping system. EC was observed to be highest in rice-wheat cropping system at both surfaces. Results revealed that organic carbon, available N, available P and available S was higher under rice-wheat cropping system. Among exchangeable bases exchangeable K was reported to be higher under cotton-wheat cropping system whereas exchangeable Ca and Na were higher under rice-wheat cropping system. DTPA-extractable micronutrients (Fe, Cu, Zn, and Mn) were higher under cotton-wheat cropping system but at par with rice-wheat cropping system. Among biological properties, higher DHA was reported in cotton-wheat cropping system whereas alkaline and acid phosphatase was reported to be higher in rice-wheat cropping system. Nutrient index value among both the cropping system was calculated and it was reported that the soil was low in N (1.4 and 1.3), Fe (1.2 and 1.1) and Ca (1.2 and 1.3), medium in K (2 and 2) and Mn (1.9 and 1.7) and higher in P (2.6 and 2), S (2.6 and 2.4), Zn (2.9 and 2.7) and Cu (3 and 2.9) availability under cotton-wheat cropping system at 0-15 and 15-30 cm depth respectively. Under rice-wheat cropping system the soil was low in Ca (1.4 and 1.5), Fe (1.4 and 1.3) and Mn (1.3 and 1.3) availability at 0-15 and 15-30 cm respectively, medium in N availability (1.6) at 0-15 cm and low (1.2) at 15-30 cm depth and medium in K (2.2 and 1.8) availability at 0-15 and 15-30 cm respectively and higher in P (2.9 and 2.7), S (2.6 and 2.6), Cu (2.8 and 2.8) and Zn (2.6) availability at 0-15 cm depth whereas Zn availability was medium (2.4) at 15-30 cm depth.enThesis