1. Abbas M, Parveen Z, Iqbal Z, Riazuddin M, Iqbal S, Ahmed M, Bhutto R (2010) Monitoring of toxic metals (cadmium, lead, arsenic and mercury) in vegetables of Sindh, Pakistan, Kathmandu University. J Sci Engin Technol 6(2):60–65
2. Adriano DC (1986) Trace elements in the terrestrial environment. Springer-Verlag Inc, New York, pp 1–45
3. Ahmad K, Khan ZI, Ashfaq A, Ashraf M, Yasmin S (2014) Assessment of heavy metal and metalloid levels in spinach (Spinacia oleracea L.) grown in wastewater irrigated agricultural soil of Sargodha, Pakistan. Pak J Bot 46(5):1805–1810
4. Ahmad K, Nawaz K, Khan ZI et al (2018a) Effect of diverse regimes of irrigation on metals accumulation in wheat crop: an assessment-dire need of the day. Fresen Environ Bull 27(2):846–855
5. Ahmad K, Kokab R, Khan ZI, Ashfaq A, Bashir H, Mudasra M et al (2018b) Assessment of heavy metals in wheat variety “Chagi-2” under short-term wastewater irrigation. Biologia (Pakistan) 64(1):15–25