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1998 · External reference

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1986 · External reference

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1969 · External reference

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Unresolved reference

1984 · External reference

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1997 · External reference

Unresolved reference

1996 · External reference

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1996 · External reference

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2000 · External reference

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1996 · External reference

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1996 · External reference

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Unresolved reference

1973 · External reference

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1990 · External reference

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1995 · External reference

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1998 · External reference

Unresolved reference

1995 · External reference

Unresolved reference

1952 · External reference

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1993 · External reference

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1992 · External reference

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1992 · External reference

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1989 · External reference

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2000 · External reference

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1996 · External reference

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1995 · External reference

Unresolved reference

1998 · External reference

Nitrogen flows in ley–arable systems

1996 · External reference

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1991 · External reference

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1988 · External reference

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1998 · External reference

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1990 · External reference

Effecten van mais-gras vruchtwisseling

1996 · External reference

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1997 · External reference

Door scheuren van grasland veel stikstof voor snijmaı̈s

1998 · External reference

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1999 · External reference

Complémentarité herbe–cultures dans les rotations

1999 · External reference

Unresolved reference

External reference

Soil inorganic-N and nitrate leaching on organic farms (1993)

10.1017/s0021859600076528 · 1993 · External reference

Influence of rotational systems and reduced inputs on soil N and C mineralization

1997 · External reference

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10.1007/bf00009924 · 1990 · External reference

Potential contribution of ploughed grassland to nitrate leaching

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1965 · External reference

Nitrate in ground water and the effects of ploughing on release of nitrate

1986 · External reference

The role of grassland in organic livestock farming

2000 · External reference