Chapter 10. Temporally and spatially dependent nitrogen management for diverse environments
Material type:
ArticleLanguage: English Series: World Agriculture SeriesPublication details: Iowa, IA (USA) : Wiley-Blackwell, 2009.Subject(s):
In:
Wheat science and trade Iowa, IA (USA) : Wiley-Blackwell, 2009. p. 203-213Summary: (1) As annual world fertilizer nitrogen (N) consumption approaches 100 million tonnes, agriculture in particular must manage fertilizer N more efficiently for grain production and to minimize adverse environmental impact. Current practices where almost all nitrogen is applied preplant for wheat production are not environmentally sensitive nor do they optimize fertilizer use. Methods to increase nitrogen-use efficiency are sorely needed. (2) Preplant soil testing that can determine the soil-available ammonium and nitrate forms of nitrogen is valuable, but nitrogen response varies considerably from year to year and from field to field. (3) Nitrogen-rich strips applied preplant in wheat production fields can assist farmers in determining accurate midseason fertilizer N rates. (4) A variant of this methodology, ramp calibration strips, offers midseason visual interpretation of N demand and an applied method for optimizing fertilizer N.
| Item type | Current library | Collection | Call number | Status | |
|---|---|---|---|---|---|
| Book part | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-5539 (Browse shelf(Opens below)) | Available |
(1) As annual world fertilizer nitrogen (N) consumption approaches 100 million tonnes, agriculture in particular must manage fertilizer N more efficiently for grain production and to minimize adverse environmental impact. Current practices where almost all nitrogen is applied preplant for wheat production are not environmentally sensitive nor do they optimize fertilizer use. Methods to increase nitrogen-use efficiency are sorely needed. (2) Preplant soil testing that can determine the soil-available ammonium and nitrate forms of nitrogen is valuable, but nitrogen response varies considerably from year to year and from field to field. (3) Nitrogen-rich strips applied preplant in wheat production fields can assist farmers in determining accurate midseason fertilizer N rates. (4) A variant of this methodology, ramp calibration strips, offers midseason visual interpretation of N demand and an applied method for optimizing fertilizer N.
Conservation Agriculture Program
Text in English
INT1421
CIMMYT Staff Publications Collection