J. Nat. Resour. Life Sci. Educ. 39:125–131 (2010). doi:10.4195/jnrlse.2009.0021 • http://www.JNRLSE.org © American Society of Agronomy 5585 Guilford Road, Madison, WI 53711 USA ABSTRACT Opportunities for farmers to participate in greenhouse gas (GHG) credit markets require that growers, students, extension educators, offset aggregators, and other stakeholders understand the impact of agricultur...

The aim of this study was to evaluate the response corn (Zea mays L.) grain yield nitrogen (N) fertilizer application and its residual effect on soybean [Glycine max (L.) Merr.] seed yield. During 2021 growing season, a corn-soybean rotation continued at Scandia, KS (USA), evaluating five N rates (0, 53, 107, 161, 214 lb N/a) applied in under both dryland irrigated conditions. Average yields ra...

Understanding tillage, N, and P interactions can contribute to improved N and P utilization and crop response. This study examined the interaction effects of tillage and N rate of two N sources on N and P uptake by corn (Zea mays L.). The study was conducted on Kenyon loam (fine loamy, mixed, mesic Typic Hapludolls) soil at the Iowa State University Northeast Research and Demonstration Farm nea...

Furrow irrigations dominate row-crop irrigation scenarios in many regions worldwide. In this study, corn (Zea mays L.) yield and evapotranspiration (ET) an all-furrow (FI) were compared against applied through alternate furrows (SFI, skip-furrow irrigation) rainfed (RF) systems on farm-scale fields 2017 2019 {corn phases of a soybean [Glycine max (L.) Merr.]–corn rotation} clay soil the Lower M...

Row-crop agriculture is under pressure to reduce sediment and nutrient losses to surface water resources by practicing less tillage and more precise application and placement of nutrients. Field studies started in 1997 were conducted through 2002 on very low to low P-testing (3 to 5 ppm Bray P1) and medium to high-P testing (11 to 19 ppm Bray P1) sites of a Nicollet-Webster clay loam complex at...

Abstract - The objective of this work was to evaluate the effects crop production systems under no-tillage and with surface liming, after 10 11 years, on nematode populations soybean (Glycine max) grain yield. Twelve treatments were established in a randomized complete block design, four replicates. plots consisted three (monoculture, followed by fallow off-season; succession, millet rotation, ...

In 1987, the United States Department of Agriculture (USDA-ARS) National Sedimentation Laboratory, in cooper­ ation with the Mississippi Agricultural and Forestry Experi­ ment Station (MAFES) and the Natural Resources Conservation Service (NRCS), initiated an interdisciplinary research project to develop profitable and environmentally sustainable conservation production systems for silty upland...

A common crop rotation in the west Iran is wheat-fallow-corn. The fallow period after wheat harvest (during fall and winter) can lead to soil erosion, nutrient losses (e.g. nitrate leaching) and offsite movement of pesticides. This period is an ideal time to establish a cover crop. In order to investigate the effects of different autumn-bseeded cover crops on subsequent irrigated corn response ...

Quantifying energy issues associated with agricultural systems, even for a two-crop corn (Zea mays L.) and soybean (Glycine max [L.] Merr.) rotation, is not a simple task. It becomes even more complicated if the goal is to include all aspects of sustainability (i.e., economic, environmental, and social). This Issue Paper examines energy issues associated with and affecting corn/soybean rotation...