Information for farmers

Corn mineral nutrition:

  • Corn is very sensitive to soils. Clay soils and water-logged soils are not suitable for it.
  • Corn is very sensitive to nutrition elements during the first month of growth and development.
  • The period of maximum nitrogen consumption (65%) lasts from paniculation to flowering.  This is also the period when more then half of all the nutrition elements are consumed.
  • Corn is sensitive to acid soils, the best level is 5,7?7,3 рН, it is therefore recommended to apply calcium-ammonium nitrate to acid soils.
  • Corn gives positive reaction to organic fertilizers and it is recommended to apply 80-100 t/ha of them in fall before plowing.

Best time to apply mineral fertilizers:

  • On loam soils it is recommended to apply phosphorus and potassium fertilizers in fall, on sandy soils – in spring on presowing cultivation.
  • It is crucial to apply 10-15 kg/ha (in major nutrient equivalent) of phosphorus into rows at sowing.
  • About 70% of the full volume of nitrogen is applied during presowing cultivation in spring.
  • Corn also requires about 50-65 kg/ha of sulphur.
  • For additional nutrition ammonium nitrate and its sulphur containing forms give the best result.
  • Zinc is recommended as microfertilizer for corn and is to be applied at the volume of 50-100 g/ha at the stage of 3-4 leaves. iron and manganese are also recommended.

Timing and standards for application of mineral fertilizers produced by URALCHEM in order to achieve the planned yield level, kg/ha:

Type of fertilizer
Fertilizer grade, kg/ha
Comments
Planned yield, c/ha
200-300
301-400
400-450
450-500
500-600

Nitrogen *

Ammonium nitrate

Additional nutrition

55-70

70-85

85-95

95-105

105-130

70-90

90-110

110-125

125-135

135-165

Calcium ammonium nitrate (27N +4 Ca)

50-65

65-80

80-85

85-95

95-120

Nitrogensulphate (32N+5S)

Calcium-ammonium nitrate (27N +4 Ca)

On acid soils

60-70

70-90

90-110

110-120

120-140

Complex*

NPKS 21-10-10-2

Estimated amount for presowing application

200-265

265-335

335-365

365-400

400-500

NPKS 22-7-12-2

190-255

255-325

325-350

350-380

380-475

NPKS 27-6-6-2

Additional nutrition

55-70

70-85

85-95

95-105

105-130

After application of 60 t/ha of organic fertilizers.