Information for farmers

Spring wheat mineral nutrition:

  • The root system is less developed (in comparison with other grain crops).
  • Spring wheat is sensitive to acidity level – the best rate рН 6?7,5.
  • Very demanding to mineral nutrition:
  • Bigger part of nutrients is taken up during the first half of the whole development period (before flowering).
    • 82?90% of nitrogen
    • 82?100% of phosphorus
    • 100 % potassium
  • By the time the grain formation period starts nutrients accumulation is practically over and the formation of grain is progressing due to nutrients redistribution.
  • During the stage of tillering and initiation of ear primordium spring grain crops need nitrogen more then ever – they take up to 40% of nitrogen consumed during the whole vegetation period.
  • Phosphor helps on the root system development, large ear formation, earlier maturing. Shortage of phosphorus causes bad assimilation of nitrogen and potassium.
  • Initial growth period is critical with regard to phosphorus and potassium. Shortage of these nutrients reduces crop yield by 20-30%.

Mineral fertilizers application timing:

Application of one-time high dose of nitrogen prior to sowing at the rate of 90 kg/ha in major nutrient equivalent (260 kg/ha of ammonium nitrate or nitrogen sulphare 32?0?0?5) is more effective then split application of nitrogen fertilizers. On acid soils calcium-ammonium nitrates are used.

It is recommended to apply phosphorus and potassium in fall under winter ploughing at the following rates: Р – 45, К – 60 kg/ha (in major nutrient equivalent).

  • Sulphur improves baking characteristics of wheat and increases clay content.
  • Copper sulphate is the micronutrient that is recommended as additional nutrition during the stage of tillering and initiation of ear promordia at the amount of 100-200 g/ha. If the soil acidity is over рН 6,0, additional nutrition with manganese is 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 crop yield (grain), c/ha

20-30

31-40

41-50

51-60

61-70

71-80

Nitrogen *

Ammonium nitrate

Major, presowing

143-171

171-200

200-228

228-257

257-285

285-314

Calcium-ammonium nitrate (27 N + 4Ca)

Major, on acid soils

165-200

200-235

235-265

265-300

300-335

335-367

Nitrogen sulphate (32N + 5S)

Major, sulphur lacking soils

140-165

165-190

190-220

220-250

250-280

280-310

Complex**

NPKS 22-7-12-2

Presowing application

200-250

250-300

300-340

340-390

390-430

430-480

NPKS 27-6-6-2

150-170

170-200

200-220

220-245

245-270

270-310

After application of organic fertilizers at the rate of 60t/ha.