Author(s):

Anil Kumar Saxena and Suneeta Singh

Abstract: A field experiment was conducted at Modipuram, District Meerut (U.P.) to evaluate the effects of zinc, farmyard manure and their combined application at two different schedules of application i.e. after two crop cycles or once in three years on yields and micronutrient contents of third year rice and subsequent wheat crops. Application of Zn, FYM and their conjoint applications increased grain and straw yields of both rice and subsequent wheat crop however, no significant effect of treatment application schedule was recorded on yields of any crop. Combined application of 2.5 kg Zn + 5 t FYM/ha increased the grain and straw yield of rice and wheat crops by 39.3, 34.2, 29.5 and 15.0 per cent over control, respectively. Application of Zn alone or in combination with FYM increased Zn concentration in rice straw. Application of treatments after two crop cycles resulted higher Zn concentration in rice grain as compared to treatment application limited to first year rice crop. The interaction effect of treatments and their application schedule significantly influenced concentration of Cu, Fe and Mn in crops. Application of 2.5 kg Zn + 5 t FYM/ha to rice crop can be recommended for rice-wheat rotation on Zn-deficient Ustochrept soils of western Uttar Pradesh.

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