Effect of first, subsequent irrigation (s) and tillage on grain yield, nutrients uptake, rooting density of wheat, soil moisture content, consumptive use and water use efficiency Mahey, R.K.; Onkar Singh; Avtar Singh; Brar, S.S.; Virk, A.S.; Jasvinder Singh Research on Crops 3(1): 1-10 2002 https://eurekamag.com/research/003/728/003728450.php