Irrigation Management
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Browsing Irrigation Management by Author "Alam, Mahbub, author"
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Item Open Access Center pivot sprinkler package survey results(Colorado State University. Libraries, 2009-02) Rogers, Danny H., author; Alam, Mahbub, author; Shaw, L. K., authorItem Open Access Economics of irrigation ending date for corn: using field demonstration results(Colorado State University. Libraries, 2007-02) Alam, Mahbub, author; Dumler, Troy J., author; Rogers, Danny H., author; Shaw, Kent, authorItem Open Access Field scale evaluation of center pivot systems(Colorado State University. Libraries, 2001-02) Rogers, Danny H., author; Clark, Gary A., author; Alam, Mahbub, authorItem Open Access Filtration and maintenance considerations for SDI systems(Colorado State University. Libraries, 1998-02) Trooien, Todd P., author; Alam, Mahbub, author; Freddie R. Lamm, Freddie R., authorItem Open Access Filtration: a basic component for SDI to avoid clogging hazards(Colorado State University. Libraries, 2003-02) Alam, Mahbub, author; Rogers, Danny H., author; Lamm, Freddie R., author; Trooien, Todd P., authorItem Open Access Irrigation efficiencies of surface systems(Colorado State University. Libraries, 1997-02-04) Alam, Mahbub, authorItem Open Access Land application of animal waste on irrigated fields(Colorado State University. Libraries, 2007-02) Schlegel, Alan, author; Stone, Loyd, author; Bond, H. Dewayne, author; Alam, Mahbub, authorAnimal wastes are routinely applied to cropland to recycle nutrients, build soil quality, and increase crop productivity. This study evaluates established best management practices for land application of animal wastes on irrigated corn. Swine (effluent water from a lagoon) and cattle (solid manure from a beef feedlot) wastes have been applied annually since 1999 at rates to meet estimated corn P or N requirements along with a rate double the N requirement (2xN). Other treatments were N fertilizer (60, 120, and 180 lb N/a) and an untreated control. Corn yields were increased by application of animal wastes and N fertilizer. Over-application of cattle manure has not had a negative effect on corn yield. For swine effluent, over-application has not reduced corn yields except for 2004, when the effluent had much greater salt concentration than in previous years, which caused reduced germination and poor early growth. All animal waste and N fertilizer treatments increased soil solution NO3-N concentration (5-ft depth) compared with the untreated control. Application of animal wastes on a N requirement basis resulted in similar NO3-N concentrations as fertilizer N applied at 180 lb/a (approximate recommended rate). The 2xN application caused NO3- N concentrations to about double for both swine and cattle wastes. Application of swine effluent based on P requirement produced similar NO3-N concentrations as the 2xN rate because of the relatively low P content in the effluent.Item Open Access Land application of animal waste on irrigated fields(Colorado State University. Libraries, 2006-02) Schlegel, Alan, author; Stone, Loyd, author; Bond, H. Dewayne, author; Alam, Mahbub, authorAnimal wastes are routinely applied to cropland to recycle nutrients, build soil quality, and increase crop productivity. This study evaluates established best management practices for land application of animal wastes on irrigated corn. Swine (effluent water from a lagoon) and cattle (solid manure from a beef feedlot) wastes have been applied annually since 1999 at rates to meet estimated corn P or N requirements along with a rate double the N (2xN) requirement. Other treatments were N fertilizer (60, 120, and 180 lb N/a) and an untreated control. Corn yields were increased by application of animal wastes and N fertilizer. Over-application of cattle manure has not had a negative effect on corn yield. For swine effluent, over-application has not reduced corn yields except for 2004, when the effluent had much greater salt concentration than in previous years, which caused reduced germination and poor early growth. All animal waste and N fertilizer treatments increased soil solution NO3-N concentration (5-ft depth) compared with the untreated control. Application of animal wastes on a N requirement basis resulted in similar NO3-N concentrations as fertilizer N applied at 180 lb/a (approximate recommended rate). The 2xN application caused NO3- N concentrations to about double for both swine and cattle wastes. Application of swine effluent based on P requirement produced similar NO3-N concentrations as the 2xN rate because of the relatively low P content in the effluent.Item Open Access MIL evaluation of center pivot irrigation systems(Colorado State University. Libraries, 2006-02) Rogers, Danny H., author; Alam, Mahbub, author; Clark, Gary A., author; Shaw, L. Kent, authorItem Open Access SDI water quality assessment guidelines(Colorado State University. Libraries, 2003-02) Rogers, Danny H., author; Lamm, Freddie R., author; Alam, Mahbub, authorItem Open Access Subsurface drip irrigation for alfalfa in Kansas(Colorado State University. Libraries, 2001-02) Alam, Mahbub, author; Trooien, Todd, author; Stone, Steven, author; Rogers, Danny, authorThe result from a two year field study on suitability of using subsurface drip irrigation (SDI) for Alfalfa provided some answers to alfalfa producers of Kansas. The study was set-up in a producer field for demonstration. The soil belongs to Otero-Ulysses complex and sandy loam in texture. The treatments included placement of drip tapes at (a) 1.5 M spacing at 0.46 and 0.30 M depth of placement, (b) 1.0 M spacing at 0.46 and 0.30 M depth, (c) 0.76 M spacing at 0.46 depth, and (d) a center pivot sprinkler irrigated plot seeded to alfalfa. Emergence of seedlings was adversely affected at 1.5 M spacing of drip tapes showing 'striping'. The total yield was reduced for spacing of drip tapes at 1.5 M in both 1999 and 2000. The depth of placement of the drip tapes (0.46 and 0.30 meters) showed no effect on yields.Item Open Access Twenty-one years of SDI research in Kansas(Colorado State University. Libraries, 2010-02) Lamm, Freddie R., author; Rogers, Danny H., author; Alam, Mahbub, author; O'Brien, Daniel M., author; Trooien, Todd P., authorThis paper will summarize research efforts with subsurface drip irrigation in Kansas that has occurred during the period 1989 through 2009. Special emphasis will be made on brief summaries of the different types of research that have been conducted including water and nutrient management for the principal crops of the region, SDI design parameters and system longevity and economics. Annual system performance evaluations have shown that dripline flowrates are within 5% of their original values. Economic analysis shows that systems with such longevity can be cost competitive even for the lower-valued commodity crops grown in the region.Item Open Access Twenty-two years of SDI research in Kansas(Colorado State University. Libraries, 2011-02) Lamm, Freddie R., author; Rogers, Danny H., author; Alam, Mahbub, author; O'Brien, Daniel M., author; Trooien, Todd P., authorThis paper will summarize research efforts with subsurface drip irrigation in Kansas that has occurred during the period 1989 through 2010. Special emphasis will be made on brief summaries of the different types of research that have been conducted including water and nutrient management for the principal crops of the region, SDI design parameters and system longevity and economics. Annual system performance evaluations have shown that dripline flowrates are within 5% of their original values. Economic analysis shows that systems with such longevity can be cost competitive even for the lower-valued commodity crops grown in the region.Item Open Access Using livestock wastewater with SDI: a status report after three seasons(Colorado State University. Libraries, 2001-02) Lamm, Freddie R., author; Trooien, Todd P., author; Stone, Loyd R., author; Alam, Mahbub, author; Rogers, Danny H., author; Clark, Gary A., author; Schlegel, Alan J., authorUsing subsurface drip irrigation (SDI) with lagoon wastewater has many potential advantages. The challenge is to design and manage the SDI system to prevent emitter clogging. A study was initiated in 1998 to test the performance of five types of driplines (with emitter flow rates of 0.15, 0.24, 0.40, 0.60, and 0.92 gal/hr-emitter) with lagoon wastewater. A disk filter (200 mesh, with openings of 0.003 inches) was used and shock treatments of chlorine and acid were injected periodically. Over the course of three seasons (1998-2000) a total of approximately 52 inches of irrigation water has been applied through the SDI system. The flow rates of the two smallest emitter sizes, 0.15 gal/hr-emitter and 0.24 gal/hr-emitter have decreased approximately 30% during the three seasons, indicating some emitter clogging. The three largest driplines (0.40, 0.60, and 0.92 gal/hr-emitters) have had less than 5% reduction in flow rate. The disk filter and automatic backflush controller have performed adequately with the beef livestock wastewater in all three years. Based on these results, the use of SDI with beef lagoon wastewater shows promise. However, the smaller emitter sizes normally used with groundwater sources in western Kansas may be risky for use with lagoon wastewater and the long-term (> 3 growing seasons) effects are untested.