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Nikki Hanson, Amy L. Ross-Davis, and Anthony S. Davis

protocols for the two species use a variety of seed cleaning techniques, either with or without a stratification treatment, and employ an assortment of containers and media, either with or without fertilizer amendments ( Bartow, 2006 ; Leigh et al., 2006

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H.H. Krusekopf, J.P. Mitchell, T.K. Hartz, D.M. May, E.M. Miyao, and M.D. Cahn

This paper is a portion of a thesis by H.H.K. in partial fulfillment of MS degree requirements at the Univ. of California, Davis. This research was supported in part by grants from the California Dept. of Food and Agriculture's Fertilizer

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George E. Boyhan, Reid L. Torrance, and C. Randy Hill

A wide variety of experiments on onion fertility have been conducted worldwide on various soils, interaction with microorganisms, fertilizer source, and with numerous treatment levels and varieties ( Gamiely et al., 1991 ; Sharma et al., 2003

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M. Lenny Wells

). Overfertilization can be more common in orchard crops than in many other crop species as a result of the increased likelihood of fertilizer N application during the dormant period of perennial crops. Excess N increases vegetative growth, which promotes shading and

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L. Carolina Medina, Thomas A. Obreza, Jerry B. Sartain, and Robert E. Rouse

broadcast applications of ammonium nitrate fertilizer. However, the high water-solubility of this material in combination with Florida's sandy soils and humid conditions can cause poor nutrient use efficiency and leaching of nitrate N (NO 3 -N) below the

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Subhrajit K. Saha, Laurie E. Trenholm, and J. Bryan Unruh

leach through soils and contaminate groundwater if not properly applied, although other research has shown that properly applied fertilizer is assimilated by the grass ( Erickson et al., 2001 ; Snyder et al., 1984 ). Proper fertilizer management

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Margaret M. Saska and Yulia A. Kuzovkina

fertilizing willows for cut-stem production range from 60 to 80 lb/acre nitrogen (N) ( Gouin, 1990 ). However, studies addressing the effects of fertilizer on stem count and length of cuts of ornamental willows have been limited. A 2-year study investigated N

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Andre Luiz Biscaia Ribeiro da Silva, Joara Secchi Candian, Lincoln Zotarelli, Timothy Coolong, and Christian Christensen

; Scholberg et al., 2013 ). As a result, Florida and Georgia cabbage growers apply N fertilizer rates higher than the recommendations as a tentative measure to ensure high yields, which increase the cost of production, create environmental concerns, and may

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George Hochmuth, Terril Nell, J. Bryan Unruh, Laurie Trenholm, and Jerry Sartain

Tampa Bay Estuary Program claimed that the two largest contributors of nutrients to Tampa Bay were atmospheric deposition and storm water runoff ( Tampa Bay Estuary Program, 2006 ). Urban fertilizer. Fertilizers used on urban landscapes and turf may be a

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Simone da Costa Mello, Francis J. Pierce, Rachel Tonhati, Guilherme Silva Almeida, Durval Dourado Neto, and Kiran Pavuluri

tuberosum L.) require each of the nutrients in PH, often in significant quantities, and are commonly included in nutrient management programs. Polyhalite has a known potential as a fertilizer ( Barbarick, 1989 ; Fraps, 1932 ) but has had limited use