Navigation Links
A little nitrogen can go a long way
Date:9/3/2008

s in both years generally followed the order of historical yield zones, though at Site 1 in 2003 average grain yields were not different among yield zones. Uniform nitrogen and seed density management resulted in high yields for all four site years, and site-specific management strategies resulted in no or small yield increases. Only at Site 1 in 2003 were there small but statistically significant yield increases with variable rate nitrogen management. There were no significant effects of seed density on yield, nor any interactions between seed density and nitrogen rate.

Fertilizer nitrogen use efficiency (NUE) was high in all site-years and well above national averages. NUE was particularly influenced by the amount of residual nitrate-nitrogen present in the soil profile prior to planting. At Site 1, NUE tended to be highest with the strategy that combined variable rate nitrogen with uniform seed density. At Site 2 in 2003, there was no advantage to variable rate nitrogen in NUE, while in 2004 a variable rate strategy which applied more nitrogen in high-yielding areas of the field resulted in the highest NUE.

At Site 1 in 2003, variable rate nitrogen management increased the gross economic return above fertilizer costs. However, for the other three site-years, there were no significant effects of site-specific management on profitability.

The conclusion of the study was that, using the strategies the researchers selected, they could not demonstrate consistent significant economic benefits to site-specific management. One site-year did indicate an economic benefit to site-specific management, but this was before costs associated with collecting and analyzing site-specific information were included. However, this economic analysis was conducted using 2004 values of grain and fertilizer.

With significant increases in the price of fertilizer and the value of grain in 2007 and 2008, the value of using site-specific management is lik
'/>"/>

Contact: Sara Uttech
suttech@agronomy.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Mothers little helpers
2. Choosing dry or wet food for cats makes little difference
3. Book on little-known species and conservation provides guidance to managers and others
4. Ancient lemurs little finger poses mystery
5. Variety is the spice of life: too many males, too little time...
6. Too much or too little weight gain poses risks to pregnant mothers, babies
7. Getting better with a little help from our micro friends
8. MSU researcher uses grant to study little-known but largely useful microbes
9. Little teeth suggest big jump in primate timeline
10. Building a stronger roof over your head: 3 little pigs project begins first tests
11. Nitrogen -- the silent species eliminator
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/1/2014)... the deserts, rainforests, prairies and forests of the world ... Central Park, according to a surprising new study led ... Boulder. , The research team analyzed 596 soil ... discovered a stunning diversity of below-ground life, most of ... 8.5 percent to 16.2 percent of the organisms discovered ...
(Date:9/30/2014)... --- Do we think of nature as something that we ... need to "preserve?" Or do we think of ourselves as ... of nature, but what about a house? , The ... also reflected in our actions, our speech and in cultural ... the University of Washington, the American Indian Center of Chicago ...
(Date:9/30/2014)... Calif. The National Institutes of Health (NIH) ... today to develop an electrode array system that ... brain works through unprecedented resolution and scale. , ... to support President Obama,s BRAIN (Brain Research ... research effort to revolutionize our understanding of the ...
Breaking Biology News(10 mins):Microbes in Central Park soil: If they can make it there, they can make it anywhere 2Microbes in Central Park soil: If they can make it there, they can make it anywhere 3The cultural side of science communication 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 2NIH taps lab to develop sophisticated electrode array system to monitor brain act 3
... ROCKVILLE, Md. -- The two premier plant biology journals published ... Plant Physiology and The Plant Cell -- ... H2O, on March 9, 2011. HighWire, the online hosting platform ... from the bottom up, creating a standards-based hosting solution that ...
... pack now in development could help our troops when ... aim of being up to fifty per cent lighter ... the solar and thermoelectric-powered system could make an important ... is being developed by the University of Glasgow with ...
... Spanish . , A study at the Universidad ... deal with maritime disasters such as the Prestige concludes that in ... when confronting this type of spills. The study analyzes the ... that of the Prestige, the oil tanker which sank off the ...
Cached Biology News:ASPB journals migrate to new Web platform 2Solar power systems could lighten the load for British soldiers 2Solar power systems could lighten the load for British soldiers 3A research study analyzes marine spill prevention policies in Spain 2A research study analyzes marine spill prevention policies in Spain 3
(Date:9/30/2014)... German . , ... in a semiconductor layer. Quantum dots are small structures that ... a short laser pulse is fired at the photonic crystal, ... a change in the electromagnetic field around it. This change ... by the dot. As soon as the refractive index recovers ...
(Date:9/30/2014)... YORK , Sept. 30, 2014 ... and segments with highest potential revenues Do you ... updated report gives you revenue predictions for those ... For those therapies you find financial data, R&D ... analysis you get sales forecasts to 2024 at ...
(Date:9/30/2014)... 2014 Follow us on LinkedIn ... type of cholesterol carrier or lipoprotein in the blood. ... cholesterol levels in the body, especially along the walls ... attack and other cardiovascular disorders. Cardiovascular Diseases (CVD) is ... cholesterol levels on a regular basis, to assess an ...
(Date:9/30/2014)... OriginOil Inc. (OTC/QB: OOIL), developer of ... clean up large quantities of water, announced today that ... on the launch of the company's CLEAN-FRACâ„¢ industrial grade ... partner STW Resources . , Immediately upon startup, ... (bpd) and achieved a 99.8% reduction in Turbidity on ...
Breaking Biology Technology:Ultrafast remote switching of light emission 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 2Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 3Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 4Biosimilars and Follow-On Biologics: World Industry and Market Prospects 2014-2024 5Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 2Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 3Surging Diabetic, Obese and Hypertensive Population Drives the Global Cholesterol Testing Market, According to New Report by Global Industry Analysts, Inc. 4OriginOil, Inc. Report to Shareholders: Blue Gold in West Texas 2
... Dendreon Corporation (Nasdaq: DNDN ) today ... (MEDCAC) reviewed the impact of labeled and unlabeled use ... with advanced prostate cancer. This panel was convened as ... was initiated by the Centers for Medicare and Medicaid ...
... See video from Denmark at: ... Danish astronomer Tycho Brahes, remains are now being ... in Prague, Czech Republic. On November 15, the ... coffin can be analyzed as the silk is ...
... have demonstrated a new imaging tool for rapidly ... their use in creating a new class of ... less power than today,s. The semiconducting nanostructures ... conventional silicon components and circuits. However, one obstacle ...
Cached Biology Technology:Dendreon Announces MEDCAC Panel Reviewed PROVENGE Evidence 2Dendreon Announces MEDCAC Panel Reviewed PROVENGE Evidence 3Imaging tool may aid nanoelectronics by screening tiny tubes 2Imaging tool may aid nanoelectronics by screening tiny tubes 3
96 Well Plate UB, RE bottom; consistent medium binding affinity for hydrophobic complexes and proteins....
... Incubated Console Orbital Shakers combine high ... unequalled programming power. The patented ... the unit to run with heavy ... filtration system reduces contamination. The ...
...
... combine high durability and capacity with ... use. The patented triple-counterbalanced heavy-duty mechanism ... run at high speed with heavy, ... range is delivered with tight uniformity ...
Biology Products: