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Dan TerAvest, Jeffrey L. Smith, Lynne Carpenter-Boggs, Lori Hoagland, David Granatstein and John P. Reganold

is nitrogen (N) supply because organic fertilizers are often bulky and expensive, and release of N can be slow and unpredictable. Improving the understanding of N cycling in organic systems and increasing organic fertilizer-use efficiency are critical

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Silvia Jiménez, Mónica Pérez, Blanca María Plaza, Roberto Salinas and María Teresa Lao

use of the nutrients and greater water and fertilizer use efficiency ( Jiménez and Lao, 2005 ). Some models for the estimation P uptake have been developed. The general models that study the P dynamic in the soil, including plant uptake, are ANIMO

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Desire Djidonou, Xin Zhao, Karen E. Koch and Lincoln Zotarelli

developed to improve fertilizer use efficiency by plants and minimize the adverse impact of nutrient loss from the production site. On sandy soils with low intrinsic water and nutrient retention capacities, site-specific practices are being used to increase

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Laura Jalpa, Rao S. Mylavarapu, George J. Hochmuth, Alan L. Wright and Edzard van Santen

-Daubresse et al., 2010 ). Terms such as the agronomic efficiency (AE) with the balance method ( Syers et al., 2008 ), partial nutrient balance ( Fixen et al., 2015 ), and nutrient/fertilizer use efficiency ( Fixen et al., 2015 ) are other terms that may also be

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-release fertilizer rates, indicate that capillary wick irrigation provides similar water use and fertilizer use efficiencies as periodic subirrigation and no-leach overhead irrigation. Connecticut survey documents nursery and landscape industry preferences for

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Bee Ling Poh, Aparna Gazula, Eric H. Simonne, Francesco Di Gioia, Robert C. Hochmuth and Michael R. Alligood

production costs ( Banedjschafie et al., 2006 ; Ouchi et al., 1990 ; Sainju et al., 2002 ; Sivapalan, 2006 ; Zhang et al., 2003 ). Other efforts to increase fertilizer use efficiency have focused on modifying fertilizer rates ( Zotarelli et al., 2008

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Xin Zhao, Qianqian Dong, Shubang Ni, Xiyong He, Hai Yue, Liang Tao, Yanli Nie, Caixian Tang, Fusuo Zhang and Jianbo Shen

fertilizers on the soil surface, resulting in low fertilizer-use efficiencies. We recommend that furrow-band application of fertilizers (fertilizers are applied into a 10- to 15-cm deep furrow as a localized supply of nutrients) could be more suitable for

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Thomas A. Obreza and Arnold Schumann

. To remain sustainable, the industry must improve nitrogen (N) and phosphorus (P) fertilizer use efficiency because total maximum daily load implementation will limit N and/or P loading in watersheds where citrus is grown. The objectives of this

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Jinrong Liu, W. Roland Leatherwood and Neil S. Mattson

2 ). Collards FW exhibited a significant interaction as well, but not DW ( Table 2 ). This relationship indicates a possible gain in fertilizer use efficiency under subirrigation. To further elucidate this relationship, quadratic regression equations

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Silvia Jiménez Becker, Blanca María Plaza and María Teresa Lao

of fertilizers and decreased fertilizer use efficiency ( Rengel and Damon, 2008 ). Intensive crop production typically involves the application of an excessive amount of many nutrients as a precaution. Thus, although the application of excessive