May 2nd 2008
ENSURING ADEQUATE NUTRIENT SUPPLIES FOR HEALTHY HIGH YIELDING CROPS
Results of soil tests carried out by Nickerson Direct last winter showed many fields are lacking in the key nutrients required for crop growth including potash, phosphate and sulphur. If deficiencies are not corrected before sowing crops, then remedial action will be required once the crop has established. Initial results from the soil testing have shown that one in four fields required liming to correct an acidic pH. Two-thirds of samples tested had potash levels lower than ideal for maize and phosphate levels were also low – below a phosphorous index of 2 - in nearly half the samples tested. However, 18% of samples were very high in phosphorous with an index of 4. Nickerson Direct’s forage manager Simon Broddle said: “A crop of maize will remove a total of around 55kg/ha of phosphate from the soil. Where high phosphate levels have been identified it is likely that more slurry was spread – perhaps over a period of years - than could be utilised by the crop. This has left an excess of phosphate in the soil which then locks up other nutrients like copper, zinc, iron and potassium making them unavailable to the plant, and causing plant deficiencies later.” “Deficiencies in trace elements were also detected – 79% of samples had sulphur levels below recommended limits and manganese was lacking in 58%.” “Where soil tests have not been carried out prior to drilling, and then poor crop performance signals nutrient deficiencies/excesses, nutrient supplementation can be given in the form of liquid feeds like Multimin and Multimax.” Mr Broddle advises farmers to contact their Nickerson Direct seed specialist for more information on ensuring optimum crop health and growth.
