Organic matter and nitrogen in the unharvested fractions of grass swards in relation to the potential for nitrate leaching after ploughing von WHITEHEAD, D.C., BRISTOW, A.W., LOCKYER, D.R.

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Effects of grazing and nitrogen fertiliser on the soil microbial biomass under permanent pasture von Bristow, A.W, Jarvis, S.C

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fate at several time intervals of 15N-labelled ammonium nitrate applied to an established grass sward von Bristow, A.W, Ryden, J.C, Whitehead, D.C

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