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Research Article 

Tillage and Coated-Urea Effects on Nitrous Oxide Emissions from Direct-Seeded, Delayed-Flood Rice Production in Arkansas

Casey Rector, Kristofor R Brye, Joshua Humphreys, Richard J Norman, Nathan A Slaton, Edward E Gbur, Cammy Willett and Michelle A Evans-White

Abstract

Rice (Oryza sativa L.) is a key component of the diet of billions of humans, thus rice is a main agricultural product in many regions, particularly in eastern Arkansas, USA. Rice production is known to be a source of greenhouse gases, namely methane (CH4), but, under certain conditions, nitrous oxide (N2O) as well. The objective of this study was to evaluate the effects of tillage practice [conventional tillage (CT) and no-tillage (NT)] and urea fertilizer type [N-(n-butyl) thiophosphoric triamide (NBPT)-coated and non-coated urea] on N2O fluxes, season-long N2O emissions, and the global warming potential (GWP) from rice grown in eastern Arkansas in a direct-seeded, delayed-flood production system on a silt-loam soil.

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Review Article 

Water Management and Cultivar Effects on Methane Emissions from Direct-seeded, Delayed-flood Rice Production in Arkansas

Joshua Humphreys, Kristofor R Brye, Casey Rector, Edward E Gbur and Jarrod T Hardke

Abstract

Methane (CH4) emissions from rice (Oryza sativa L.) production are a source of concern in the environmental and agricultural communities. New and/or revised agronomic methodologies will be needed to identify production practice combinations that reduced CH4 emissions without decreasing yields or milling quality.

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Mini Review 

Approaches to the Study of Plant-Phytopathogen Interactions: In Vivo and In Vitro Assay Systems of Phytobacterial Pathogenesis

Seunghwan KIM, Jeong-Gu KIM, and Lin-Woo KANG

Abstract

Plant-phytopathogen interactions, such as rice-Xanthomonas oryzae pv. oryzae (Xoo) interactions, are important for the fate of both the host plant and invading phytopathogen, particularly in the early stage of infection.

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Research Article 

Is Phenotypic Variability in Leaf Vein Density in Rice Associated with Grain Yield?

Ruwanthi Nayananjalee Nawarathna, Kithsiri Bandara Dassanayake, Sarath Premalal Nissanka, Saman Seneweera and Phillip Salisbury

Abstract

Rice, Oryza sativa L. is the staple food of half of the world's population, mostly in Asia. Therefore, it is essential to increase rice yield to meet the rising food demand by the year 2050.

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