
Soil enzymatic activities and available P and Zn as affected by tillage practices, canola (Brassica napus L.) cultivars and planting dates
Keywords: C، کربن; Alkaline and acid phosphatase; Canola (Brassica napus L.); Dehydrogenase; Tillage practices; Phosphorous; ZincP, phosphorous; Zn, zinc; N, nitrogen; C, carbon; NT, MT, CT, no-, minimum-, and conventional tillage, respectively; PD1, PD2 and PD3, 8th and 23