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Fertilizer nitrogen recovery in tea as influenced by nitrogen levels
Communications in Soil Science and Plant Analysis, 1999Abstract A pot culture study was conducted to evaluate the fertilizer nitrogen (N) utilization by young clonal tea plants, UPASI‐3 [Camellia assamica ssp. assamica (Masters) Wight] using N‐15 labeled urea at varying levels. Out of assimilated N, major proportion was partitioned to leaves followed by roots and stem. Significant increase in the amount of
R. Raj Kumar, S. Marimuthu, L. Manivel
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Sulphur Balance at Different Nitrogen Fertilization Levels
Cereal research communications, 2008Quantities of sulphur losses via lysimeters and sulphur wheat grain uptake were studied in a field experiment set up on Stagnosols near Popovaca, Central Croatia. Winter wheat was cultivated in 2005/2006. The highest grain uptake of 16.9 kg S ha-1 and the highest S-S042- leaching via lysimeters was achieved at treatment with 300 kg of nitrogen per ha ...
Jurišić, Aleksandra +3 more
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TOMATO YIELD, NITROGEN UPTAKE AND USE EFFICIENCY IN RELATION TO NITROGEN FERTILIZATION LEVELS
Acta Horticulturae, 2012The improvement of the fertilizer use efficiency is needed to reduce the environmental impact of vegetable production, especially in the protected cultivation systems. Nitrogen is one of the most important nutrients for its effects on yield and fruit quality, nevertheless it has a great potential for ground water pollution. Therefore a deeper knowledge
GIUFFRIDA, FRANCESCO +4 more
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Agronomy Journal, 2005
Low levels of available S in soils may limit bahiagrass (Paspalum notatum Flugge) growth in Florida. To characterize the response of bahiagrass to S fertilizer, we annually applied a factorial combination of four N (N0–N255 = 0, 85, 170, and 255 kg ha−1, respectively) and S (S0–S285 = 0, 95, 190, and 285 kg ha−1, respectively) levels to a >40‐yr‐old
R. S. Kalmbacher +3 more
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Low levels of available S in soils may limit bahiagrass (Paspalum notatum Flugge) growth in Florida. To characterize the response of bahiagrass to S fertilizer, we annually applied a factorial combination of four N (N0–N255 = 0, 85, 170, and 255 kg ha−1, respectively) and S (S0–S285 = 0, 95, 190, and 285 kg ha−1, respectively) levels to a >40‐yr‐old
R. S. Kalmbacher +3 more
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Soil nitrate nitrogen levels as an index of nitrogen fertilizer needs of sugarbeets
Journal of Sugarbeet Research, 1971Management of soil nitrogen supplies for high yields and quality is one of the major problems fac ing the sugarbeet industry at the present time. If soil testing procedures can be success fully used to predict nitrogen fertilizer requirements, the poten tial benefits to the industry are substantial.
J. O. Reuss, P. S. C. Rao
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Effect of nitrogen fertilizers on leaf and soil nitrogen levels in highbush blueberries
Communications in Soil Science and Plant Analysis, 1990Abstract Leaf N and soil nitrate and ammonium levels were monitored in 1986 and 1987 following N fertilization of 8–9 year old highbush blueberries. Urea was applied at 76 kg N/ha in a single application at bud break or in two applications (split) at bud break and petal fall.
Jorge B. Retamales, Eric J. Hanson
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The relationships between soil inorganic nitrogen levels and nitrogen fertilizer requirements
Agriculture, Ecosystems & Environment, 1986Abstract This paper reviews the application of soil analysis of inorganic nitrogen (nitrate and ammonium nitrogen which are readily available to plants) for deriving optimum fertilization of winter cereals, sugar beet and malting barley in the German Democratic Republic.
S. Müller, K. Beer
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Effects of Nitrogen Fertility on Bt Endotoxin Levels in Maize
Journal of Entomological Science, 2007Three Bt maize hybrids (two with Bt event MON-810, one with Bt event DBT-418) and one nonBt maize hybrid were grown at Stoneville, MS, USA in 2002 and 2003 with N-fertility rates of 0, 112, 224, and 336 kg N/ha, respectively. Tissue samples of the 7th leaf at growth stage V5 (5 fully extended leaves) and primary ear leaf sheaths and outer ear husks at ...
Craig A. Abel, H. Arnold Bruns
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Nitrate nitrogen leaching at different nitrogen fertilization levels
2003Increased rates of applied mineral nitrogen led to higher average values of NO3- N concentration in drainage water. At the treatments with 100 and 150 kg ha-1 N, average nitrate nitrogen concentration was lower than 10 mgL-1 for all years. At the treatments with higher doses of nitrogen, concentrations of NO3- N in drainage water were also higher, and ...
Bašić, Ferdo +4 more
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