Slide 1

Kahawa

Chai

Mahindi

Miwa

 Important points to remember about this crop.

 Average approximate Nutrients uptake (Kg. of Nutrient) to produce 1 ton of Maize grains.

 Major nutrients (Unit Kg./T) –

 Nitrogen – 210, Phosphorus – 86, Potassium – 193.

 Removed (Utilised) to make grains (Kg./T)

 Nitrogen – 15.8, Phosphorus – 7, Potassium – 4.6.

 Secondary nutrients (Unit Kg./T) –

 Magnesium – 50, Calcium – 40, Sulphur – 26

 Removed (Utilised) to make grains (Kg./T)

 Magnesium – 1.9, Calcium – 0.7, Sulphur – 1.2

 Micronutrients (Unit Kg./T) –

 Iron – 1.03, Manganese – 1.51, Zinc – 0.42, Copper – 0.11, Molybdenum – 0.02, Boron – 0.3

 Removed (Utilised) to make grains (gm./T) –

 Iron – 16, Manganese – 10, Zinc – 18, Copper – 6, Molybdenum – 1, Boron – 30.

 Over half of the required Nitrogen, Phosphorus, Magnesium and 80% of Potassium is taken up before crop reaches Generic growth stages. Silking stage is the first generic stage known as R1.

Phosphorus is required at early stages of crop development for rooting and boosting shoot and leaf growth as well as later it helps in grain formation.

Potassium is very important in this crop as it provides strength and quality to the crop. It is required for leaf and stem growth along with Nitrogen. Its peak demand is during stem extension and during maturity (for grain development).

Key micronutrients taken up by this crop in greater quantities are Iron and Manganese. These nutrients are lost after harvest through straws.

Boron and Zinc which are another 2 important micronutrients required in relatively large quantities. These nutrients are lost after harvest through Grains.

Zinc is also very important to ensure good rooting and shoot development.

Agrimax has Nitrogen, Phosphorous, Potassium, Sulphur, Iron, Manganese, Zinc, Copper, Molybdenum and Boron in balanced and substantial quantity, which takes care of these nutrient requirements.

 

Pollination –

Important thing to remember in pollination is that the Ear (female organ) remains receptive to pollens (from Tassels) for approximately 3 weeks but 10 days after that it goes on decreasing.

Importance of balanced nutrition hence can take the growth of Tassels and ears in a required manner (together).

 

Growth Stages –

Can be named from 0 to 10 or Vegetative - V1 (Vegetative-1) to VT (Tasseling) and R1 (Reproductive 1, Silking) to R 6 - Physiological maturity.

Important growth stages for application of Agrimax –

·         Stage V4 – Four leaves unfolded  -