Performance of wheat (Triticum aestivum) + Indian mustard (Brassica juncea) intercropping in relation to row ratio, Indian mustard variety and fertility levels

A field experiment was conducted during the winter seasons of 1999–2000 and 2000–2001 at Varanasi, Uttar Pradesh, to evaluate the effect of varying row ratio, Indian mustard [Brassica juncea (L.) Zernj. & Cosson] variety and fertility levels on yield potential, competitive function and economics of wheat + Indian mustard intercropping. Association of wheat with Indian mustard under 5:1 row ratio was found more sustainable, as it accounted for higher value in terms of land-equivalent ratio (LER) and relative crowding coefficient (1.690) and was economically more remunerative. For association with wheat, Indian mustard var. ‘Sanjucta Asesh’ proved economically viable than ‘Vardan’ with a minimum depression in yield and yield attributes of wheat. To achieve higher yield advantage and efficient resource utilization, an application of 100% recommended dose of fertilizer to both the component crops was found imperative. Though performance of wheat was better in its sole stand, Indian mustard varieties thrived better in intercropping treatments to their solid stands.