Wednesday, December 12, 2018

New guide to potato nutrition

October 20, 2011 by  
Filed under Crops

A NEW guide to potato crop nutrition is to be published by K+S UK & Eire.

The 16-page A4 booklet details the latest advice on crop needs, reflecting changes to RB209 fertiliser recommendations.

According to the company’s technical manager, Jerry McHoul, potato growers are pretty adept at maximising crop growth through tailored fertiliser use.

“The new guide though provides clear recommendations for the need of appropriate maintenance dressings of basal fertilisers applied before the potato crop to suit needs across an arable rotation.

“It also focuses on the use of in-season applications, particularly when crops are under stress and at times when nutrients held in the soil may be unavailable to sustain the growth needed for top yields and high crop quality.”

He points out that recent changes to potato crop recommendations within the guide include advice to increase potash use on index 0, 1 and index 2+ soils and lower rates of phosphate application across all soils.

However, perhaps one of the most significant changes is the recognised requirement for a maintenance application of 40kg/ha of magnesium (MgO) on soils at Index 2, where none has been recommended in the past.

“Magnesium is key component of chlorophyll and we have increasingly seen in-season issues due to lack of supply, with crops yellowing and slower growing in dry springs/early summers,” says Mr McHoul.

“At the same time, growers should not ignore the use of products such as zinc or manganese in situations where these nutrients could also restrict growth.”

Copies of the new guide, published in mid-November, are available from info@KS-ukeire.co.uk or by ringing 01283 711615.

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