“…The various workers recommended the introduction of N, P 2 O 5 and K 2 O in the range of 25-75, 60-65 and 2-30 kg/ha, respectively, for higher tuber yield (Anonymous, 2002, Kothari andPaturde et al 2000;Singh et al, 2004a;Wankhade et al, 2004). The studies showed that application of NPK in the ratio of 25:25:25, 50:50:50 and 45:60:60 kg/ha or farmyard manure (FYM) (10-40 t/ha) alone or in combination with NPK, greatly enhance the yield of fresh tubers (Anonymous, 2003;Anonymous, 2005b;Chauhan et al, 2005;Chouhan and Joshi, 2002;Ingle et al, 2004;Kothari and Singh, 2003;Paturde et al, 2002;Singh et al, 2001a;Wankhade et al, 2004). The availability of water in the fields also directly effects the uptake of primary (NPK), secondary (S, Mg, Ca, Fe) and micro (Cu, Zn, Mn) nutrients in C.…”