Dynamics of Nutrients and Cation Exchange Capacity (CEC) under Different Crop Sequences and Tillage Systems in Subtropical Dry Land
Dynamics of Nutrients and Cation Exchange Capacity (CEC) under Different Crop Sequences and Tillage Systems in Subtropical Dry Land
Asma Hassan*, Zuhair Hasnain, Shahzada Sohail Ijaz, Muhmmad Ansar, Muhmmad Rasheed, Ajaz Ahmad, Lubna Ayub Durani and Muhmmad Bilal Ali
ABSTRACT
Correct choice of crops and appropriate tillage systems are economically valuable for former depends on sufficient nutrient supply and satisfactory soil and climatic conditions. Moldboard plough (MP) (control), tine Cultivator (TC) and minimum tillage (MT) as main treatment, Crops sequence as subplot included were fallow–wheat (Triticum aestivum), (FW, control), mungbean (Vigna radiata)–wheat (MW), sorghum (Sorghum bicolor)–wheat (SW), green manure–wheat (GW) and mungbean-chickpea (MC) (Cicer arietinum). In summer in 2010-11 the highest nitrogen (N) concentration was under MT with GW (5.5 mg kg-1), 2011-12 it was more in GW (6.13 mg kg-1) under MP. In winter from second year it was highest in MP with MC (8.4 mg kg-1). Phosphorus (P) and potassium (K) concentration second year it was highest under MT with MW (7.1 mg kg-1) and with MC (72 mg kg-1), respectively. The highest CEC at the end of winter from 2010-11 under MT in GW (3.67). Second year, in winter the highest CEC was under MT in SW (3.65 cmolc kg-1). Micro nutrients iron (Fe) concentration from 2011-12 in winter was more under MT with GW (34.28 mg kg-1). Copper (Cu) concentration in second year was highest under MT and MP with SW and GW (0.34 mg kg-1). Zinc (Zn) concentration was highest in summer 2011-12 with MC (1.8 mg kg-1). Ultimately, study documented the adaptation of MT with GW and legumes bases cropping system could batter option to improve fertility status in soil of Pothwar Pakistan.
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