Vol. 13, Issue 4 (2024)

1) Zn = 0 kg Zn ha⁻¹, 2) Zn = 2.5 kg Zn ha^-1, 3) Zn= 5 kg Zn ha⁻¹, and 4) Zn= 7.5 and 5) 10.0 kg Zn ha⁻¹) with different frequencies of Zn application i.e. once in 1^st year, alternate years, and continuous, were applied in the soil. The treatments were imposed on triplicate unit plots (4 × 5 m) before rice planting. This research aims to ascertain the relationship between soil physicochemical properties and zinc fractions under the Rice-Rapeseed cropping system in Manipur. Among the zinc fractions, WSEXZn is negatively correlated with EC and pH and correlated positively with soil organic carbon, CEC, and clay. OC-Zn significantly correlates with organic carbon, DTPA-Zn, and clay, except CEC and pH and EC of soils are negatively correlated with OC-Zn. MN-Zn significantly correlates with organic carbon and CEC but only positively correlates with DTPA-Zn and clay. pH correlates significantly negatively with Mn-Zn. AMOX-Zn is significantly negatively correlated with pH and positively correlated with EC, OC, CEC, clay, and DTPA-Zn. CEC, OC, DTPA-Zn, and clay have a positive and negative association with pH and EC of soils with CRYOXZn, respectively. OC, CEC, DTPA-Zn, and clay are positively and negatively correlated to the pH and EC of soils with RES-Zn. pH and EC are negatively correlated with total Zn and significantly positively with OC, except CEC and clay of the soils.

Zinc, fractions, rice-rapeseed, correlation