Search Results

You are looking at 1 - 10 of 4,883 items for :

  • application rate x
  • Refine by Access: User-accessible Content x
Clear All
Full access

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

Open access

Lloyd L. Nackley, Brent Warneke, Lauren Fessler, Jay W. Pscheidt, David Lockwood, Wesley C. Wright, Xiaocun Sun, and Amy Fulcher

, branches develop, fruit form, and crops are harvested. Each phenophase has variable intra and interseasonal canopy development that requires variable-rate pesticide applications for maximal application efficiency ( Chen et al., 2013a ; Gil and Escolà, 2009

Open access

Lauren Fessler, Amy Fulcher, Liesel Schneider, Wesley C. Wright, and Heping Zhu

because trees are generally devoid of branches within 1 m of ground level ( Hong et al., 2018 ), application inefficiencies caused by overapplication and off-target application are compounded in nurseries. For example, even at a reduced rate of 700 L⋅ha −1

Free access

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

Full access

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

Full access

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

Open access

Lauren Fessler, Amy Fulcher, Dave Lockwood, Wesley Wright, and Heping Zhu

common despite some modern pesticide labels recommending lower spray volume application rates ( Darde et al., 2019 ; Lordan et al., 2019 ; Walklate et al., 2003 ). Moreover, in crops where there are dense canopies or multirow production blocks, such as

Free access

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

Open access

Adam D. Karl, Michael G. Brown, Sihui Ma, Ann Sandbrook, Amanda C. Stewart, Lailiang Cheng, Anna Katharine Mansfield, and Gregory M. Peck

horticultural practice. To investigate the feasibility of orchard foliar fertilization for increasing apple juice YAN, ‘Red Spy’ apple trees located in Lansing, NY, were provided with three rates of foliar urea applications during the 6 weeks before harvest. The

Free access

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