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You searched for: Journal Agronomy journal Remove constraint Journal: Agronomy journal Publication Year 2014 Remove constraint Publication Year: 2014 Text Availability Full Text Remove constraint Text Availability: Full Text
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1. Remediation/Restoration of Degraded Soil: II. Impact on Crop Production and Nitrogen Dynamics

Author:
Mikha, Maysoon M.; Stahlman, Phillip W.; Benjamin, Joseph G.; Geier, Patrick W.
Source:
Agronomy journal 2014 v.106 no.1 pp. 261
ISSN:
0002-1962
Subject:
Avena sativa; Haplustolls; Panicum miliaceum subsp. miliaceum; Sorghum bicolor; Triticum aestivum; acid soils; application rate; cattle manure; conventional tillage; crop rotation; eroded soils; fertilizers; grain sorghum; grain yield; leaching; manure spreading; nitrogen; no-tillage; oats; remediation; risk; silt loam soils; soil profiles; urea; winter wheat; Kansas
Abstract:
... The response of manure applications on calcareous eroded soils in the western United States is unlike the responses observed on acid soils in the eastern United States. The objectives of this study were to restore the productivity and evaluate N loss of eroded land influenced by tillage practices, N sources, and N rates. The study was initiated in 2006 on an Armo silt loam (fine-loamy, mixed, mesi ...
Handle:
10113/59373
DOI:
10.2134/agronj2013.0279

2. Remediation/Restoration of Degraded Soil: I. Impact on Soil Chemical Properties

Author:
Mikha, Maysoon M.; Benjamin, Joseph G.; Stahlman, Phillip W.; Geier, Patrick W.
Source:
Agronomy journal 2014 v.106 no.1 pp. 252
ISSN:
0002-1962
Subject:
Haplustolls; acid soils; cattle manure; conventional tillage; eroded soils; fertilizer rates; nitrogen fertilizers; no-tillage; phosphorus; remediation; silt; silt loam soils; soil nutrient dynamics; soil organic carbon; soil pH; soil sampling; spring; urea; Kansas
Abstract:
... Nutrient dynamics in the calcareous eroded soils of the western United States may react differently than the acid soils in the eastern United States. The objectives of this study were to evaluate the impact of tillage practices and N treatments on changes in soil nutrient constituents. The eroded study was initiated in 2006 at the Agriculture Research Center, Hays, KS, on an Armo silt loam (fine-l ...
Handle:
10113/59381
DOI:
10.2134/agronj2013.0278

3. Soil–Plant Nutrient Interactions on Manure-Enriched Calcareous Soils

Author:
Moore, Amber; Hines, Steve; Brown, Bradford; Falen, Christi; de Haro Marti, Mario; Chahine, Mireille; Norell, Richard; Ippolito, Jim; Parkinson, Stuart; Satterwhite, Megan
Source:
Agronomy journal 2014 v.106 no.1 pp. 73
ISSN:
0002-1962
Subject:
Zea mays subsp. mays; animal manures; calcareous soils; corn silage; correlation; crops; irrigated farming; nitrogen content; nutrient content; nutrient deficiencies; nutrient management; nutrient-nutrient interactions; soil amendments; soil fertility; soil nutrients; soil sampling; surveys; Idaho
Abstract:
... Growers working with manured soils often rely on soil test information when developing nutrient management for their crop, especially when manure application information is unavailable. Nutrient-enriched soils, like manured soils, can trigger nutrient deficiencies and toxicities due to plant–soil nutrient interactions. The goal of the study was to determine correlations between soil test and plant ...
Handle:
10113/58081
DOI:
10.2134/agronj2013.0345

4. Fertilizer and Irrigation Management Effects on Nitrous Oxide Emissions and Nitrate Leaching

Author:
Maharjan, Bijesh; Venterea, Rodney T.; Rosen, Carl
Source:
Agronomy journal 2014 v.106 no.2 pp. 703
ISSN:
0002-1962
Subject:
corn; emissions; grain yield; growing season; irrigation management; leaching; nitrates; nitrification inhibitors; nitrogen; nitrous oxide; nutrient management; nutrient use efficiency; sand; sandy soils; slow-release fertilizers; soil-atmosphere interactions; split application; urea; urea fertilizers; urease; Minnesota
Abstract:
... Irrigation and N fertilizer management are important factors affecting crop yield, N fertilizer recovery efficiency, and N losses as nitrous oxide (NO) and nitrate (NO. Split application of conventional urea (split-U) and/or one-time application of products designed to perform as enhanced-efficiency N fertilizers may mitigate N losses. The objective of this study was to compare the effects of cont ...
Handle:
10113/59593
DOI:
10.2134/agronj2013.0179

5. Chlorophyll Meter Calibrations for Chlorophyll Content Using Measured and Simulated Leaf Transmittances

Author:
Raymond Hunt, E.; Daughtry, Craig S. T.
Source:
Agronomy journal 2014 v.106 no.3 pp. 931
ISSN:
0002-1962
Subject:
Zea mays; calibration; chlorophyll; corn; equations; leaves; near infrared radiation; physical models; red light; simulation models; spectral analysis; transmittance
Abstract:
... Konica-Minolta SPAD-502 leaf chlorophyll meters provide a relative value of leaf chlorophyll content, and from the literature, there are considerable variations among the calibration equations between total chlorophyll contents (μg chlorophyll + cm) and SPAD-502 values. Our objective was to determine the leaf properties that contributed to the variations in calibration. We determined the internal ...
Handle:
10113/59824
DOI:
10.2134/agronj13.0322

6. Soil Nitrogen and Forage Yields of Corn Grown with Clover or Grass Companion Crops and Manure

Author:
Grabber, John H.; Jokela, William E.; Lauer, Joseph G.
Source:
Agronomy journal 2014 v.106 no.3 pp. 952
ISSN:
0002-1962
Subject:
Lolium multiflorum; Secale cereale; Trifolium ambiguum; Trifolium pratense; Zea mays; agronomic traits; application timing; autumn; companion crops; corn; corn silage; cover crops; crop rotation; crude protein; dry matter accumulation; forage yield; grasses; live mulches; management systems; manure spreading; nitrates; nitrogen; no-tillage; organic soils; rye; soil nutrients; spring; Wisconsin
Abstract:
... Few studies have compared the agronomic performance of cover crop and living mulch systems for no-till silage corn (L.). In a 4-yr Wisconsin study, we evaluated soil N levels and forage yields from manured rotations of corn grown with kura clover (M. Bieb.) living mulch or interseeded red clover (L.) followed by a year of clover production and from manured continuous corn grown with interseeded It ...
Handle:
10113/62856
DOI:
10.2134/agronj13.0466

7. Crop Diversification, Tillage, and Management System Influence Spring Wheat Yield and Water Use

Author:
Lenssen, A. W.; Sainju, U. M.; Jabro, J. D.; Iversen, W. M.; Allen, B. L.; Evans, R. G.
Source:
Agronomy journal 2014 v.106 no.4 pp. 1445
ISSN:
0002-1962
Subject:
Hordeum vulgare; Pisum sativum; Triticum aestivum; Zea mays; barley; continuous cropping; conventional tillage; corn; crop rotation; crop yield; crop-weed competition; fertilizer application; field experimentation; integrated crop management; management systems; nitrogen fertilizers; no-tillage; peas; plant available water; plant density; planting date; soil productivity; soil quality; soil water content; spring wheat; water use efficiency
Abstract:
... Depleted soil quality, decreased water availability, and increased weed competition constrain spring wheat production in the northern Great Plains. New management systems are necessary for improved crop productivity. The objective of our study was to compare productivity and soil water use of spring wheat (L.) in four crop rotations (continuous wheat, wheat–pea [ L.], wheat–forage barley [ L.]–pea ...
Handle:
10113/59068
DOI:
10.2134/agronj14.0119

8. Evaluation of Vegetation Indices for Early Assessment of Corn Status and Yield Potential in the Southeastern United States

Author:
Torino, Miguel S.; Ortiz, Brenda V.; Fulton, John P.; Balkcom, Kipling S.; Wood, C. Wesley
Source:
Agronomy journal 2014 v.106 no.4 pp. 1389
ISSN:
0002-1962
Subject:
Zea mays; canopy; chlorophyll; corn; correlation; data collection; developmental stages; fertilizer rates; grain yield; leaf area index; leaves; models; nitrogen; nitrogen fertilizers; planting; prediction; rain; reflectance; soil texture; vegetation; vegetative growth; Alabama
Abstract:
... The use of crop canopy sensors for variable rate nitrogen (VRN) application in corn (L.) production across the southeastern United States implies assessment of corn N status as early as the V6 growth stage. Our goals were to identify vegetation indices (VIs) that best: (i) correlate with plant status variables such as leaf area index (LAI) and leaf chlorophyll (Chl) and (ii) predict corn grain yie ...
Handle:
10113/62402
DOI:
10.2134/agronj13.0578

9. Cultivar, Harvest Date, and Nitrogen Fertilization Affect Production and Quality of Fall Oat

Author:
Coblentz, W. K.; Jokela, W. E.; Bertram, M. G.
Source:
Agronomy journal 2014 v.106 no.6 pp. 2075
ISSN:
0002-1962
Subject:
Avena sativa; Zea mays; autumn; climatic factors; cultivars; dairy manure; drought; dry matter accumulation; fertilizer rates; forage crops; forage yield; harvest date; manure spreading; nitrogen fertilizers; nutrient availability; nutrient use efficiency; nutritive value; oats; planting; urea
Abstract:
... Previous research has shown that oat (L.) has promise as a fall-forage option for dairy producers. In addition, dairy producers often have a recurring need to identify opportunity windows for manure hauling other than before or after production of corn (L.). Our objectives were to evaluate the effects of N fertilization, cultivar selection, and harvest date on dry matter (DM) yield, N uptake, N re ...
Handle:
10113/59574
DOI:
10.2134/agronj13.0436