Efficient tillage and nitrogen practices for improving monetary returns and yield of finger millet and pigeonpea in semi-arid Alfisols
DOI:
https://doi.org/10.53550/Keywords:
Organic and inorganic nitrogen, Net returns, Rainwater use efficiency, Soil fertility, Sustainable yield index, TillageAbstract
Field experiments were conducted with three tillage treatments viz., CT: Conventional tillage (3 ploughings + 3 intercultures), RT: Reduced tillage (2 ploughings + 2 intercultures) and MT: Minimum tillage (one ploughing + one interculture) in combination with three nitrogen levels viz., F1: 100% N (organic), F2: 50% N (organic) + 50% N (inorganic) and F3: 100% N (inorganic) to identify the best management practices for improving soil fertility and sustain yield of finger millet (Eleusine coracana) and pigeonpea (Cajanus cajan) under semi-arid Alfisols during 2003 to 2011. The results revealed that CTF2 gave significantly higher mean finger -1 -1 -1 millet yield of 2613 kg ha and rainwater use efficiency (RWUE) of 4.48 kg ha mm , -1 while CTF1 gave significantly higher pigeonpea yield of 907 kg ha and RWUE of 4.10 -1 -1 -1 kg ha mm over years. Further, CTF2 gave maximum net returns of ` 31639 ha and benefit-cost (B:C) ratio of 3.65 with sustainability yield index (SYI) of 59.0% from -1 finger millet, while CTF1 gave net returns of ` 43801 ha and B:C ratio of 3.26 with SYI of 56.6% from pigeonpea. Based on the effects of tillage and nitrogen on soil parameters observed in 2003 and 2011, there was a decrease in the pH, soil P and organic carbon, while there was an increase in the electrical conductivity, soil N and K. Application of N through organics or as combination of organics and inorganics, maintained maximum soil fertility compared to inorganic N alone. We conclude that CT + 50% N (organic) + 50% N (inorganic) for finger millet and CT + 100% N (organic) for pigeonpea under rotation are efficient for attaining maximum yield, RWUE, monetary returns and SYI in semi-arid Alfisols.
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