Apple trees require satisfactory soil mineral nitrogen levels before, during and a few weeks after the full bloom. Organic fertilisers are extremely heterogeneous and some of them do not provide an adequate level of bioavailable nitrogen in the desired moment.
Solution
It is necessary to choose fertilisers with low C/N ratio, if possible in liquid form, as the mineralisation* of the organic matter proceeds faster. The right amount of bioavailable nitrogen can compensate for the soil deficit and significantly improve the harvest.
Description
This CORE Organic Practice Abstract gives practical recommendations for the organic fertilisation of young apple orchards.
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