Navigation Links
Researchers combat slowing yields with targeted fertilizer applications
Date:12/10/2007

MADISON, WI, DECEMBER 10, 2007 Scientists at Punjab Agricultural University, the International Rice Research Institute, and Virginia Tech have been successful in increasing average rice yields in northwest India using site-specific nutrient management strategies.

The Punjab province, which accounts for 10 percent of the Indian rice production, is currently witnessing a slower rice grain yield growth rate as compared to the yield growth rate during the green revolution phase (1960-1986). To meet the expected food demand in the next 30 years, rough estimates for India suggest the need to increase average farm productivity of the system, which is currently at 45 to 60% of the attainable yield potential, to 70 to 80% of the attainable potential.

The researchers hypothesized that decreased nutrient supply capacity of soil and improper nutrient management approaches were key factors in the slower growth rate. By analyzing the existing soil nutrient composition and applying site-specific nutrient management (SSNM) the scientists were able to increase average rice grain yields by 17 percent compared with current farmers fertilizer practice. Similarly, profits rose about 14 percent using SSNM.

Over a two year period the scientists applied calculated amounts of nutrients at 56 sites in six key irrigated rice-wheat regions to evaluate the effectiveness of SSNM in increasing yield growth rates. Using the Quantitative Evaluation of the Fertility of Tropical Soils (QUEFTS) model, which predicts crop yields from chemical soil characteristics, the scientists refined their nutrient applications and schedules on a site-specific basis.

In addition to yield and profit increases, improved timing of fertilizer applications led to a measured 13 to 15 percent increases in plant accumulations of nitrogen, phosphorous and potassium.

While further yield increases are likely to occur in small, incremental steps that involve gradual buildup of soil fertility and fine-tuning of crop management, the authors conclude that the agronomic and economic successes of SSNM are due to its site-specific and dynamic nature which take soil variability into account. They suggest that the major challenges for SSNM will be to reduce the complexity of the technology as it is disseminated to farmers and to combat environmental pollution stemming from nutrient leaching and runoff from rice fields.

Site-specific nutrient management, as defined in our study, has potential for improving yields, profit, and nitrogen use efficiency in irrigated, transplanted rice, explained the studys author Harmandeep Singh Khurana.

Future research needs to build on the present SSNM approach to develop a more practical approach for achieving similar benefits across large areas without farm-specific modeling and with minimum crop monitoring.


'/>"/>

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

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. U of MN researchers discover noninvasive diagnostic tool for brain diseases
6. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
7. Researchers discover new strategies for antibiotic resistance
8. Researchers find new taste in fruit flies: carbonated water
9. Binghamton University researchers investigate evolving malaria resistance
10. UIC researchers find promising new targets for antibiotics
11. Researchers develop simple method to create natural drug products
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2016)... 11, 2016 --> ... report "Image Recognition Market by Technology (Pattern Recognition), by ... by Deployment Type (On-Premises and Cloud), by Industry Vertical ... by MarketsandMarkets, the global market is expected to grow ... Billion by 2020, at a CAGR of 19.1%. ...
(Date:3/10/2016)...   Unisys Corporation (NYSE: UIS ) today ... is testing its biometric identity solution at the Otay Mesa ... help identify certain non-U.S. citizens leaving the country. ... help determine the efficiency and accuracy of using biometric technologies ... run until May 2016. --> the United ...
(Date:3/9/2016)... Germany , March 9, 2016 ... country,s government identified that more than 23,000 public service ... or had been receiving their salary unlawfully.    ... African country,s government identified that more than 23,000 public ... name or had been receiving their salary unlawfully.    ...
Breaking Biology News(10 mins):
(Date:5/2/2016)... Willoughby, Ohio (PRWEB) , ... May 02, 2016 ... ... website. Designed with its clients in mind, the fresh look and added functionality ... capabilities. , “Recent years have seen a dynamic shift in agriculture – from ...
(Date:4/29/2016)... (PRWEB) , ... April 29, 2016 , ... ... medical devices used in spinal surgical procedures, today announced the completion of a ... value proposition for current and future customers and partners. Kohlberg & Company, ...
(Date:4/29/2016)... , April 29, 2016 ... the latest update to its industry-leading treatment planning software, ... that Monaco version 5.11 provides ... now attain calculation speeds up to four times faster ... . With the industry,s gold standard Monte ...
(Date:4/28/2016)... NY (PRWEB) , ... April 28, 2016 , ... ... has made significant investments in recruiting top industry experts, and expanding its LATAM ... which provides industry-leading tools for clients to manage their clinical trial projects. , ...
Breaking Biology Technology: