Although the value of sewage sludge (SS) as a fertilizer has long been recognized, it is still a matter of considerable concern, in view of the danger of excessive heavy metal uptake by plants, whereby these elements gain entry into the food chain. From 1983 to 1987, a field experiment was carried out in a split block design with four replications to evaluate grain and dry matter yield and heavy metal uptake by corn (Zea mays L.) grown on a […]

To get more efficient wheat varieties in phosphorus uptake and/or utilization it is important to look for the causes of the greater efficiency of particular varieties. One experiment in nutrient solution with four concentrations of phosphorus (1.6, 4.8, 12.9 and 32.3 µmol L-1) was conducted to compare efficient (Toropi and IAC 5) and inefficient cultivars (IAS 20 and CNT 8) in phosphorus uptake in relation to the amount of phosphorus taken up, phosphorus translocation and utilization, dry matter production and […]