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RELAY SOWING OF WHEAT IN THE COTTON–WHEAT CROPPING SYSTEM IN NORTH-WEST INDIA: TECHNICAL AND ECONOMIC ASPECTS

Published online by Cambridge University Press:  19 September 2016

MANPREET SINGH*
Affiliation:
Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab 141004, India
H. S. SIDHU
Affiliation:
Borlaug Institute for South Asia (CIMMYT-BISA), Lodowal, Punjab 141008, India
J. S. MAHAL
Affiliation:
Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab 141004, India
G. S. MANES
Affiliation:
Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab 141004, India
M. L. JAT
Affiliation:
International Maize and Wheat Improvement Center (CIMMYT), NASC complex, Pusa, New Delhi 110012, India
A. K. MAHAL
Affiliation:
Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab 141004, India
PARVINDER SINGH
Affiliation:
Borlaug Institute for South Asia (CIMMYT-BISA), Lodowal, Punjab 141008, India
YADVINDER SINGH
Affiliation:
Borlaug Institute for South Asia (CIMMYT-BISA), Lodowal, Punjab 141008, India
*
Corresponding author. Email: msbham@pau.edu; Contact address: Department of Farm Machinery and Power Engineering, Punjab Agricultural University, Ludhiana, Punjab, India.

Summary

Cotton–wheat (CW) is an important cropping system in South Asia. Wheat yields under a conventional CW system are generally lower compared to a rice–wheat system due to delayed seeding. Relay seeding of wheat can help timely sowing, capturing residual soil moisture of last irrigation to cotton, and increase the productivity and profitability of CW system. The field experiment included two Bt-cotton genotypes having different canopy cover (RCH 776 and MRC 7017), two types of relay seeders (RSs) for cotton planted at 67.5-cm and 101-cm row spacing and four types of relay seeding methods (manual broadcast, strip rotor (SR) and zero-till double disc and conventional till). Relay planting of wheat allowed one additional boll picking, which increased seed cotton yield by 12% compared with conventional tillage wheat. Cotton genotypes and RSs had no effect on emergence and yield of wheat. The RSs with SR and zero till double disc furrow openers performed better in terms of wheat emergence and grain yield compared to zero-till tine openers. Under relay seeding, wheat sowing was advanced by 31 days, which increased grain yield by 18.8% compared with conventional tillage practice. Net returns from the CW system with relay seeding of wheat were higher by US$ 311 to 425 ha−1 compared with the conventional CW system.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2016 

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