全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:A. S. Black , S. A. Waring
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1979, Vol.10 (3), pp.521-529Taylor & Francis
摘要:Nitrate (20 mg N03- N l-1) was leached through 180 cm columns of oxisol subsoil until the leachate attained the initial nitrate concentration. Leaching was continued with water until no nitrate was detectable in the leachate.The Δ15N for the first aliquot of leachate contain...
作者:E. T. Craswell , P. G. Saffigna , S. A. Waring
来源:[J].Plant and Soil(IF 2.638), 1970, Vol.33 (1), pp.383-392Springer
摘要:Summary(#br)Dry aggregates of two virgin clay soils and their cultivated counterparts were sieved into size fractions ranging from >5 mm to <0.1 mm in diameter. Total nitrogen, organic carbon, particle size distribution, and waterlogged nitrogen mineralization measurements were m...
作者:A. S. Black , S. A. Waring
来源:[J].Plant and Soil(IF 2.638), 1978, Vol.49 (1), pp.207-211Springer
摘要:Summary(#br)Water did not quantitatively extract nitrate from an adsorbing soil. A 0.05 M K 2 SO 4 extractant quantitatively recovered added nitrate and was compatible with the nitrate-specific ion electrode. The results obtained with the electrode and sulphate extractant were hi...
作者:E. T. CRASWELL , P. G. SAFFIGNA , S. A. WARING
来源:[J].Plant and Soil(IF 2.638), 1970, Vol.33 (2), pp.383-392JSTOR
摘要:Dry aggregates of two virgin clay soils and their cultivated counterparts were sieved into size fractions ranging from > 5 mm to < 0.1 mm in diameter. Total nitrogen, organic carbon, particle size distribution, and waterlogged nitrogen mineralization measurements were made on the...
作者:A. S. Black , S. A. Waring
来源:[J].Plant and Soil(IF 2.638), 1978, Vol.49 (1), pp.207-211JSTOR
摘要:Water did not quantitatively extract nitrate from an adsorbing soil. A 0.05 M K₂SO₄ extractant quantitatively recovered added nitrate and was compatible with the nitrate-specific ion electrode. The results obtained with the electrode and sulphate extractant were highly corre...
作者:M. Sharif Zia , S. A. Waring
来源:[J].Fertilizer Research, 1987, Vol.12 (1), pp.53-65Springer
摘要:Abstract(#br)A glasshouse experiment was conducted to study the balance sheet of 15 N labelled urea at three rates (zero, 31.48 and 62.97 mmol N pot −1 ) applied to rice under flooded conditions with two moisture regimes (continuous and alternate flooding) using three Austra...

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