1、Supported bythe World oforganic agricultureAFRICA 1.8 MILLION HASTATISTICS&EMERGING TRENDS 2018 NORTH AMERICA 3.1 MILLION HAOCEANIA 27.3 MILLION HALATIN AMERICA 7.1 MILLION HAASIA 4.9 MILLION HAEUROPE 13.5 MILLION HAFiBL&IFOAM ORGANICS INTERNATIONALFiBL&IFOAM ORGANICS INTERNATIONAL THE WORLD OF ORGA

2、NIC AGRICULTURE 2018 STATISTICS GLOBAL POLICY TOOLKITON PUBLIC SUPPORTTO ORGANIC AGRICULTUREAVAILABLE AT:WWW.IFOAM.BIO/POLICY-TOOLKITSLooking for professional information?FiBLs online shop has more than 400 publications!It is an invaluable source of information on organic farming,sustainable agricul

3、ture,animal husbandry and nature conservation.Publications are available in English,German,French and several other languages.Most publications are free to download!Research Institute of Organic Agriculture FiBL.Reducing the use of copper in potatoes.OK-Net Arable Practice Abstract.O K-N E T A R A B

4、 L E P R A C T I C E A B S T R A C TPRACTICE ABSTRACT NR.011 Commercial organic fertiliser as supplementary fertilisers in potato crop productionProblem During the first 35-50 days after emergence,potatoes require an optimal nitrogen supply in order to develop a good haulm and tuber growth.Manure an

5、d slurry cannot meet the demand of the crop during its growth stage.High or late fertiliser inputs lead to a late nitrogen supply,which delays the maturing of the plants,complicated the removal of the haulm and decreases tuber quality.Solution Effective commercial organic N fertilisers can optimally

6、 complement the basic supply for potatoes in spring,which consists of the preceding crop,rotted manure and slurry.Outcome Commercial organic N fertilisers allow a relatively accurate dosage of the nitrogen supply without increasing the in-festation risk of Rhizoctonia.Due to the relatively high cost