Methods of micro-nutrient application

There are three main approaches to tackle micro-nutrient disorders in potato.

First approach consists of the application of a micro-nutrient carrier to the soil where large quantity of a fertilizer has to be applied to compensate the high fixation capacity or quick reversion of the nutrient elements to unavailable forms. However, its effect lasts for a few years depending upon the type of the soil and cropping system.

Second approach consists of foliar application of micro-nutrients to each crop while the third approach is of treating mother seed tubers, with micro-nutrient compounds.  Foliar spray during dry spell should be avoided between 11 a.m. and 3 p.m. to prevent scorching of leaves. The optimum dose of different micro-nutrients are as below

 Doses of micronutrient application for correction of their deficiency in potato

Micro-nutrient

Soil application (kg/ha)

Spray application

(g/100 lit. water)

Tuber soaking treatment (g/100 lit. water)

Zinc sulphate

25

200

50

Ferrous sulphate

50

300

75

Manganese sulphate

25

200

50

Copper sulphate

25

200

50

Ammonium molybdate

2

100

20

Sodium borate

2

100

20

Back