Planting and fertilizing techniques for high yield corn

Unlike rice, corn cob differentiation occurs very early. 15-20 days after planting, when the corn has 5-7 true leaves depending on the growth time of each variety, the plant has differentiated the corn cob axis.

The corn cob axis is differentiated favorably depending on the current growth situation of the corn plant, good or bad. The length of the corn cob axis determines the number of rows/ear, the number of kernels/row and greatly affects the corn yield at the end of the season.

The density should be planted thickly. Corn varieties with upright, neat leaves or those with leaves that can be rotated to furrows can be planted at a density of 2,200-2,500 plants/Northern pole of 360m2. Spacing 17-20 x 70cm x 1 plant.

Corn varieties with large leaf angles and leaves that cannot be rotated to the furrows should be planted at a density of 1,800-2,000 plants/sao. Spacing 25-27cm x 70cm x 1 plant.

To get high yield of corn, need to fertilize as follows:

Fertilize early, ensuring adequate nutrition when the corn has 5-7 true leaves so that the plant can differentiate the corn stalks smoothly. The amount of basal fertilizer for corn when planting is 3-4 quintals of decomposed manure + 20-25 kg of superphosphate + 3-4 kg of urea + 1-2 kg of potassium chloride. Apply 10-15 cm from the seeds.

Apply the first top dressing when the corn has 5-6 true leaves, with 5-6kg of nitrogen fertilizer + 2-3kg of potassium chloride. Apply 30cm from the base, shallowly hoe and pick weeds on the bed surface, hoe 10-15cm from the base, and lightly mound the base to prevent the corn from falling over.

Apply the second top dressing when the corn has 11-12 true leaves and is about to flower. Apply 3-4kg of urea + 4-5kg of potassium chloride, 30cm from the base, combined with dredging the soil in the furrow and mounding it high at the base to help the corn grow adventitious roots (tripod roots) easily.

Spray one of the high-quality foliar fertilizers such as: K-Humate; Atonic; KH 701/701... on corn 1-2 times, each time 5-7 days apart when the corn has 3-5 true leaves so that the corn has enough micronutrients to fully differentiate the corn cob.

Water the corn sufficiently from planting until the cob is dry.

Pay attention to preventing cutworms and aphids that damage corn. Do not pluck leaves from the leaf below the ear-bearing leaf and above, and 2 leaves below the ear-bearing leaf to ensure maximum nutrient transport from the leaves to the grain. Do not plow deeply or plow many times to break the root system because corn roots are very poor at regenerating when broken.

Harvest corn when >50% of the bracts are dry so that the kernels are fully ripe, have a lot of starch, and ensure high nutritional content in the kernels.

According to Nongnghiepvn