Apple is a long-term fruit crop, and proper nutrient management becomes more important as the plant grows older. A 10-year-old apple plant is considered a mature, bearing tree and needs adequate and balanced fertilizer to support healthy growth, good flowering, proper fruit set, and high-quality fruits. Many farmers face problems like low yield, small fruits, or poor colour mainly due to improper fertilizer application. Understanding the recommended fertilizer dose and applying it correctly helps improve both production and fruit quality.
For a 10-year-old apple plant, the nutrient requirement is higher compared to young plants. At this stage, the tree has a large canopy and strong root system, so it needs sufficient nitrogen, phosphorus, and potassium every year. Generally, a 10-year-old apple tree requires about 700 to 800 grams of nitrogen, 350 to 400 grams of phosphorus, and 700 to 800 grams of potassium per plant per year. These nutrients are usually supplied through commonly available fertilizers.
Nitrogen is mainly supplied through urea or similar nitrogen fertilizers. Nitrogen helps in leaf growth, shoot development, and overall vigour of the tree. However, excess nitrogen should be avoided because it causes too much vegetative growth, delays fruit maturity, and reduces fruit colour and quality. Phosphorus supports root strength, flowering, and fruit development, while potassium improves fruit size, sweetness, colour, and shelf life.
Along with chemical fertilizers, organic manure plays a very important role. A 10-year-old apple tree should receive about 40 to 50 kg of well-decomposed farmyard manure or compost per year. Organic manure improves soil structure, water-holding capacity, and nutrient availability. It also supports beneficial soil organisms, which help in better nutrient absorption.
The method and timing of fertilizer application are equally important. Organic manure and full dose of phosphorus and potassium should be applied during winter, usually in December or January, when the tree is dormant. Nitrogen should be applied in two split doses. Half of the nitrogen dose is applied before flowering to support new growth and flowering, and the remaining half is applied after fruit set to support fruit development.
Fertilizers should be applied in a ring method around the tree, not close to the trunk. The fertilizer ring should be made below the canopy spread where feeder roots are active. After applying fertilizers, light irrigation helps nutrients move into the root zone.
Micronutrients also play an important role in apple cultivation. Deficiency of elements like zinc, boron, or calcium affects fruit quality and causes problems like poor fruit set or internal disorders. If deficiency symptoms are noticed, foliar sprays of micronutrients help correct the problem.
Proper irrigation management supports fertilizer efficiency. Nutrients are absorbed well only when soil moisture is adequate. Water stress reduces nutrient uptake, while excess irrigation causes nutrient loss.
In conclusion, a 10-year-old apple plant requires a balanced combination of organic manure and chemical fertilizers applied at the right time and in the right manner. About 700–800 grams nitrogen, 350–400 grams phosphorus, 700–800 grams potassium, along with 40–50 kg organic manure per plant per year, helps maintain healthy trees, good yield, and quality fruits. Regular observation and timely management ensure long-term productivity of apple orchards.
