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Concurrent observation of several processes of nitrogen metabolism in soil amended with organic materials: IV. Regulatory effects of ammonium- and nitrate-nitrogen on denitrification and nitrogen fixation. Soil Science and Plant Nutrition 38(4): 611-617, 1992

Behaviour of nitrogen in mineral arable soil. 4. Effect of soil conditions on gaseous nitrogen losses, especially nitrogen and nitrous oxide from applied nitrate. Bulletin of the Tokai-Kinki National Agricultural Experiment Station. 21, 151-163, 1971

The effect of crops on the nitrogen balance in the soil. I. Ammonium-nitrogen and nitrate-nitrogen contents in soil during the sowing year. Ust. ved. Inf. MZLH Rosti. Vyroba 11: 53-58, 1966

The effect of liming and molybdenum on the utilization of soil nitrogen and fertilizer nitrogen by cauliflower and the balance of ammonium and nitrate nitrogen from ammonium nitrate. Izvestiya Timiryazevskoi Sel'skokhozyaistvennoi Akademii (1): 54-66, 1981

Studies on the behavior of nitrogen in mineral arable soil part 7 effect of employing slow release nitrogen fertilizer or organic manure on gaseous nitrogen losses and phenomenon of gaseous nitrogen losses in subsoil. Bulletin of the Tokai Kinki National Agricultural Experiment Station (23): 137-143, 1972

The influence of soil pH and the form of nitrogen fertilizer on the content of nitrate - nitrogen and ammonium - nitrogen in soil solutions. Journal of Water and Land Development ( 1): 83-91, 1997

Lysimeter and field studies on nitrogen 15 in a tropical soil i. applied nitrogen 15 labelled ammonium carbonate and the movement of nitrogen 15 labelled nitrate in a loam soil the effect of initial soil moisture content on infiltration rate. Plant and Soil 114(1): 3-12, 1989

Nitrogen pools and turnover in arable soils under different durations of organic farming: I: Pool sizes of total soil nitrogen, microbial biomass nitrogen, and potentially mineralizable nitrogen. Journal of Plant Nutrition and Soil Science 164(4): 415-419, 2001

Advance fertilization of summerwheat by nitrogen application to rape previously planted as a catch crop. field tests of two years on central German loess parabrown soils with nitrate and ammonium fertilizers nitrogen. iI. quantity time passage of nitrogen fractions in soil. Gottinger bodenkundliche Berichte: 8 77-235, 1977

Amounts of nitrate nitrogen and ammonium nitrogen in soil from autumn to spring under winter wheat and their relationship to soil type sowing date previous crop and nitrogen uptake at rothamsted woburn and saxmundham england uk 1979 1985. Journal of Agricultural Science 108(1): 73-96, 1987

Transformation of ammonium and nitrate fertilizer nitrogen in soil into different organic fractions and their availability. Journal of Nuclear Agriculture & Biology 25(2): 100-108, 1996

The effect of varying ammonium nitrogen to nitrate nitrogen ratio on nitrogen uptake growth and tissue nitrogen fractions of poinsettia cultivar annette hegg supreme. Hortscience 16(3 SECT 2): 416, 1981

Effect of ammonium nitrogen nitrite nitrogen and nitrate nitrogen on anaerobic nitrogenase activity in soil. Soil Biology & Biochemistry 6(6): 353-358, 1974