Bibliography on magnesium, nitrpgen, phosphorus and sulphur levels in crops showing deficiency symptoms (1963 - 1956)
text
xx
England
Commonwealth Bureau of Soils
1963
9999
monographic
und
9p.
Magnesium,Nitrogen,Sulphur,Phosphorus,Soil science
016:631.81.095.338:631.811.1' 2' 6' 7:633 1956/63 K3
140224