Crops and soils.

Alleviating soil fertility constraints to increased crop production in West Africa Charlotte Jhonson 2010 Aspects of crop growth Author not listed 1981 Assessment of soil nutrient balance Roy, R.N [et al.] 2003 Heavy metals in soils [edited by] B.J. Alloway 1990 Modifying the root environment to reduce crop stress edited by G.F. Arkin, H.M. Taylor 1981 Nitrogen turnover in the soil-crop system edited by J.J.R. Groot, P. de Willigen, E.L.J. Verberne 1991 Principles of soil-plant interrelationships Rendig, Victor V. 1989 Simulation of field water use and crop yield Feddes, R. A. 1978 Soil conditions and plant growth Russell, Edward J. 1961 Soil nutrient bioavailability Barber, Stanley A. 1984 Soil salinity edited by H. Frenkel and A. Meiri 1985 Soils Donahue, Roy Luther 1983 Soils in our environment Miller, Raymond W. 1995 Solute movement in the soil-root system Nye, Peter Hague 1977 Tracer manual on crops and soils a joint undertaking by the International Atomic Energy Agency and the Food and Agriculture Organization of the United Nations 1976