Yield and nitrogen yield of sorghum intercropped with nodulating and nonnodulating soybeansELMORE, R. W; JACKOBS, J. A.Agronomy journal (Print). 1986, Vol 78, Num 5, pp 780-782, issn 0002-1962Article

Distribution and recovery of nitrogen-15-labeled liquid anhydrous ammonia among various soil fractionsNORMAN, R. J; KURTZ, L. T; STEVENSON, F. J et al.Soil Science Society of America journal. 1987, Vol 51, Num 1, pp 235-241, issn 0361-5995Article

Utilization of anhydrous ammonia fixed by clay minerals and soil organic matterNORMAN, R. J; GILMOUR, J. T.Soil Science Society of America journal. 1987, Vol 51, Num 4, pp 959-962, issn 0361-5995Article

Solubilization of soil organic matter by liquid anhydrous ammoniaNORMAN, R. J; KURTZ, L. T; STEVENSON, F. J et al.Soil Science Society of America journal. 1987, Vol 51, Num 3, pp 809-812, issn 0361-5995Article

Titratable acidity to estimate ammonia retentionIZAURRALDE, R. C; KISSEL, D. E; CABRERA, M. L et al.Soil Science Society of America journal. 1987, Vol 51, Num 4, pp 1050-1054, issn 0361-5995Article