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Residual effect of nitrogen fertilizers on the economic, energy and nitrogen balances of subsequent crop fertilization. Theoretical analysis of the problem and experimental results

, : Residual effect of nitrogen fertilizers on the economic, energy and nitrogen balances of subsequent crop fertilization. Theoretical analysis of the problem and experimental results. Annales Agronomiques 30(4): 305-322

The residual effects of N fertilizers are discussed. In field trials at Toulouse maize was grown in 1977 with 150 or 300 kg N/ha applied at sowing. In 1978 durum wheat Durtal was grown on the same plots with 0, 70, 140 or 210 kg N/ha applied in split applications. Wheat grain yields without N were 0.43 t/ha in areas which were not cultivated in 1977, 1.13 t/ha on plots which received 150 kg N/ha before the maize crop and 1.86 t/ha on plots with 300 kg N/ha before the maize crop.


Other references

Ripke, E., 1980: Administrative procedures for testing for residues. The sampling and analysis of milk for toxic residues is conducted by various laboratories in the German Federal Republic and continuously evaluated. Imported cheeses, particularly from South-East Europe and Turkey, are rigorously tested.

Boyd, M.R.; McClellan, A.D., 2002: Changes in locomotor activity parameters with variations in cycle time in larval lamprey. In larval lamprey, locomotor activity recorded from whole animals and in vitro brain/spinal cord preparations was analyzed to determine how two parameters of locomotor activity, burst proportion (BP; relative duration of motor burst activity) and...

Pillai, K.M.; Murray, W.V.; Shooshani, I.; Williams, D.L.; Gordon, D.; Wang, S.Y.; Johnson, F., 1984: Steroids. 2. Synthesis of C-18 functionalized steroids via the Smith-Hughes route. The total synthesis of a series of racemic C-18 functionalized steroids was carried out in a search for novel estrogen-and/or progestin-receptor agonists or antagonists. The target compound 3,18-dihydroxyestra-1,3,5(10)-triene (2), 13-(2-oxopropyl...

Bruce, K.W., 1952: Tuberculosis of the gingiva: report of case. Journal of Oral Surgery 10(4): 338-342

Pennell, R.B.; Huddleson, I.F., 1938: Quantitative Studies Of Brucella Precipitin Systems : Ii. The Precipitation Of Heterologous Antisera By Brucella Endoantigens. Quantitative cross precipitation studies with goat antisera show the three endoantigens of the brucella to be serologically distinguishable. Although the endoantigens of Br. abortus and Br. suis are very similar, they do not react identically, per...

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Wang, W.J.; Bai, J.Y.; Liu, D.P.; Xue, L.M.; Zhu, X.Y., 1994: The antiinflammatory activity of shikonin and its inhibitory effect on leukotriene B4 biosynthesis. Shikonin is one of the active components isolated from the dry root of euchroma (Royle) Johnst (AERJ). It has been shown to have anti-inflammatory activity on formaldehyde induced paw swelling in rats. Preparations of AERJ has been used clinically...

Wold N., 1970: Infectiousness of different geographical strains of schistosoma japonicum in oncomelania snails and hybrid snails. Japanese Journal Of Parasitology: 388-389

Levantin D.L.; Epifanov G.V.; Stepanov N.I.; Dmitriev A.D., 1976: Fattening of young stock of cattle in grazing areas in the nonchernozem zone. Zhivotnovodstvo 6

Prokopenko, V.M.; Zatonskaia, V.M., 1983: Effect of the cell wall permeability of Klebsiella spp. on beta-lactam antibiotic resistance. Relationship between the resistance of Klebsiella spp. to beta-lactam antibiotics and the capacity of ampicillin and cephaloridin for penetration through the cell wall of this organism was studied. It was shown that Klebsiella sp. 182 and 600 were...