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REDUCING NITROGEN LOSSES AND INCREASING MAIZE PRODUCTIVITY IN ORGANIC MANURES-AMENDED SOILS BY INCREASING THE RIDGE TO FURROW PROPORTION

Published online by Cambridge University Press:  16 March 2018

SHAHID IQBAL*
Affiliation:
College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China
MUHAMMAD ARIF
Affiliation:
Department of Agronomy, The University of Agriculture, Peshawar-25000, Khyber Pakhtunkhwa, Pakistan
CHRISTIAN THIERFELDER
Affiliation:
CIMMYT Southern Africa Regional Office, Mount Pleasant, Harare, P.O. Box MP 163, Zimbabwe
TAHIRA YASMEEN
Affiliation:
Department of Environmental Sciences and Engineering, Government College University Faisalabad 38000, Pakistan
TANG LI
Affiliation:
College of Resources and Environmental Sciences, Yunnan Agricultural University, Kunming 650201, China
*
‡‡Corresponding author. Email: shahiduaf85@gmail.com

Summary

Nitrogen (N) losses greater than 40% in furrow-irrigated cropping systems are a common problem that substantially limits yields. Sustainable production methods are therefore required to reduce these losses and increase the yield under semi-arid conditions. A field trial was carried out to study the soil N dynamics and soil physicochemical properties in soils amended with organic manure (i.e. with poultry manure (PM), farmyard manure (FYM) and pressmud compost (PrM)). Soil N dynamics and properties were evaluated under different ridge to furrow ratios (1:1 and 2:1) as well as maize yield and profitability. When ridge to furrow ratio increased (2:1) in soils amended with PM, the inorganic and organic N status was increased and N losses were reduced. This strategy lowered soil pH, and maximized organic matter status and maize yield. The highest yield, net income and benefit–cost ratio were attained with 2:1 ridge to furrow ratio and PM amendment, being an alternative management for increasing maize productivity and profitability while improving nutrient use efficiency.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 2018 

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