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Heping Zhu, James Altland, Richard C. Derksen and Charles R. Krause

application rates for use in field-grown tree liner production. In response to an onset of pest infestations, liner spray applicators must make calculated decisions within a very narrow time window on how much pesticide and spray volume will be needed for

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Erin Agro and Youbin Zheng

nursery leachate and runoff. Consequently, when optimal fertilizer application rates are used, crops will perform at their best and environmental impacts will be minimized ( Cabrera, 2003 ). Controlled-release fertilizers have become the principal method

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Arnold W. Schumann

maps for future site-specific applications of agrochemicals. Real-time SSM generally does not need GPS data because decisions about agrochemical rates and crop target are made on the spot at the time of the measurement. Prescription map SSM needs GPS

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Qiang Zhu, Yuncong C. Li, Rao S. Mylavarapu, Kelly Morgan and Mingjian Geng

availability with different P application rates, 2) establishing STP critical level, and 3) calibrating the P requirement for tomato production on a calcareous soil. Materials and Methods A 2-year field trial, during Winter 2014 (29 Oct. 2014–24 Mar. 2015) and

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John C. Majsztrik, Andrew G. Ristvey, David S. Ross and John D. Lea-Cox

Bay region may be able to inform other growers, researchers and regulators. There are few data in the literature on actual commercial N and P (measured in kilograms per hectare per year) and water application (measured in liters per hectare) rates for

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Amy L. Shober, Andrew K. Koeser, Drew C. McLean, Gitta Hasing and Kimberly K. Moore

fertilizer is not the sole contributor to N exports from residential landscapes it is the most direct and deliberate addition of these nutrients to the urban ecosystem. As such, improving the fertilizer management practices (e.g., application rates, timing of

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Yuqi Li and Neil S. Mattson

knowledge, there is no report about the effect of seaweed extracts on the postharvest life of bedding plants and vegetable transplants. Different plant species can have different responses to the application methods and rates of seaweed concentrate ( Khan et

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Luther C. Carson and Monica Ozores-Hampton

, tomato varieties, soil and irrigation types, with allowances for supplemental N applications ( Olson et al., 2011 ). Growers typically follow UF/IFAS irrigation recommendations, but use N fertilizer rates greater than the UF/IFAS recommendation

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Kelly T. Morgan, T. Adair Wheaton, William S. Castle and Laurence R. Parsons

–N concentrations in groundwater above the allowed maximum contaminant limit have been attributed to application of nitrogen (N) fertilizers for citrus production ( Alva et al., 2003 ). The N source, rate of uptake, irrigation management, duration and intensity of

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Sara Andrea Moran-Duran, Robert Paul Flynn, Richard Heerema and Dawn VanLeeuwen

.g., P n ) might be affected. The objective of this study is to determine the effects of Ni and N application rates on P n activity, leaf greenness (SPAD), and shoot lignin concentration over time in nonbearing pecan trees. This study hypothesizes that