Results 81 to 90 of about 82,134 (215)
, 1998 In 1985, the Intermountain Forest Tree Nutrition Cooperative (IFTNC) established 10 nitrogen (N) fertilization trials in stands dominated by ponderosa pine.
Shaw, T.M.; Moore, J.A.
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Guan'gai paishui xuebao【Objective】 Reducing chemical fertilizer use while increasing organic fertilization has been proposed as a solution to mitigate nonpoint source pollution and soil degradation caused by chemical fertilizers.
CHEN Fenglin +4 more
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Replicability of nitrogen recommendations from ramped calibration strips in winter wheat
Ramped calibration strips have been suggested as a way for grain producers to determine nitrogen needs more accurately. The strips use incrementally increasing levels of nitrogen and enable producers to conduct an experiment in each field to determine ...
Taylor, Randal K. +4 more
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Ponderosa Pine Response to Nitrogen or Nitrogen Plus Potassium Fertilization - Annual Report
, 1998 In 1985, the Intermountain Forest Tree Nutrition Cooperative (IFTNC) established 10 nitrogen (N) fertilization trials in stands dominate by Ponderosa pine.
Shaw, T.M.
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Emissions of N2O and NO from fertilized fields: summary of available measurement data
, 2002 Information from 846 N2O emission measurements in agricultural fields and 99 measurements for NO emissions was summarized to assess the influence of various factors regulating emissions from mineral soils.
Bouwman, A.F. +2 more
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, 2005 In order to compare the ability of black spruce (Picea mariana (Mill.) BSP) 1 and tamarack (Larix laricina (Du Roi) K. Koch) to adjust to variable edaphic conditions, 2 as found in natural peatlands, we varied nitrogen (N) fertilization of seedlings in a
Macdonald, S. Ellen, Islam, M. Anisul
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Journal of AOAC INTERNATIONAL, 1972 Abstract Automation and mercury pollution are discussed with the recommendation that copper be re-evaluated as a catalyst in Kjeldahl systems.
openaire +1 more source
Agronomy Science, 2004 The two-year studies of grain of three winter wheat cultivars: Zyta, Clever and Kris cultivated in monoculture on six levels of fertilization nitrogen: 0, 50, 100, 150, 200 and 250 kg/ha of clean component, were executed.
Jarosław Mazurkiewicz
doaj
The evaluation of ground based remote sensing systems for canopy nitrogen management in winter wheat [PDF]
, 2007 Nitrogen management is a crucial issue in terms of environmental and economical efficiency for winter wheat husbandry. Precision Agriculture in particular Remote Sensing, has been used to determine the variability of the crop.
Havránková, Jana
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DETERMINING OPTIMAL FERTILIZATION RATES UNDER VARIABLE WEATHER CONDITIONS
This paper presents a theoretical framework for incorporating the following sources of risk into the determination of optimal fertilization rates: (a) the influence of weather and other stochastic factors on the marginal product of fertilizer, and (b ...
Talpaz, Hovav, Taylor, C. Robert
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