1. Adriano DC, Page AL (1981) Co-recycling of sewage sludge and fly ash: heavy metal uptake by crop. International conference on heavy metals in the environment, Amsterdam, 9:185–187
2. Ahmad K, Khan ZI, Ashfaq A, Ashraf M, Yasmin S (2014) Assessment of heavy metal and metalloid levels in spinach (Spinacia oleracea) grown in wastewater irrigated agricultural soil of Sargodha, Pakistan. Pak J Bot 46:1805–1810
3. Ahmad K, Nawaz K, Khan ZI, Nadeem M, Wajid K et al (2018) Effect of diverse regimes of irrigation on metals accumulation in wheat crop: an assessment-dire need of the day. Fresenius Environ Bull 27:846–855
4. Ahmad K, Wajid K, Khan ZI, Ugulu I, Memoona H, Sana M, Nawaz K, Malik IS, Bashir H, Sher M (2019) Evaluation of potential toxic metals accumulation in wheat irrigated with wastewater. Bull Environ Contam Toxicol 102:822–828
5. Ahmad K, Yang Y, Khan ZI, Arshad N, Ahmad T, Nadeem M, Wajid K, Bashir H, Nazar S, Munir M, Malik IS, Ashfaq A, Mahpara S, Noorka IR, Mehmood N, Abbas T, Ullah S, Memona H, Shaheen F, Akhtar M, Akhter P, Akhtar S, Ugulu I, Ma J, Chen F (2020) Assessing zinc amassing in forages, buffalo blood and topsoil collected from Sargodha City, Pakistan. Rev Chim 71:240–248. https://doi.org/10.37358/RC.20.8.8296