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Objective

Chemical Fertilizers as a component of INM in Mango (Sources, Methods, Doses and time of application).

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Objective

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  1. Chemical Fertilizers as a component of INM in Mango (Sources, Methods, Doses and time of application) Soil of India are generally poor in fertility and low in organic matter. Among major nutrients, N deficiency is universal. The soil health problem is expected to further aggravate with increasing target of food production to meet the food need of ever increasing population of the country. The important task for integrated nutrient management is the efficient management of the soil to keep it productive through continuous application of fertilizers and organic manures. For better nutrient use efficiency, source of nutrients, time of application, methods of application and doses of fertilizers/ nutrients are important.

  2. Chemical fertilizers have been the key elements in enhancing the fruit production in India. Fertilizer is the macro-micro nutrients carrier which when applied judiciously to soil or foliage meets the nutrient need of the crop. From the point of view of environmental protection the word judicious is very relevant in the in nutrient management. It implies high fertilizer management such as split application, efficient timing and proper placement etc need to be adopted. Thus it is important to have an idea about source of nutrient, methods and time of application and placement of fertilizers for better nutrient use efficiency.

  3. Objective After completing this lesson, you will be able to : Explain the different sources of nutrients, doses, time and methods of application of chemical fertilization in mango.

  4. Sources of nitrogen

  5. Sources of phosphorous

  6. Source of potassium

  7. Mix fertilizers used as NPK source

  8. Sources of micronutrient

  9. Doses of nutrients The doses applied in the subsequent years should be increased every year upto 10 years in the multiple of the first year’s dose

  10. Doses of micronutrients Borax is applied from 5th year at the rate of 125 g/tree and increased 25 g every.

  11. Factor for calculating quantity of different fertilizers

  12. Time of application Non-bearing plants can be supplied fertilizers in several split doses. This helps in avoiding loss of nutrient through leaching since root system of young plants are not so elaborated. Bearing trees, apply full quantity of nitrogenous fertilizers, half phosphorous and half potash just after harvesting of fruits in June/July. The other half quantity of phosphorous and potash should be applied in October with last irrigation. Foliar application of 3 % urea in sandy soils is recommended before flowering.

  13. Fertilizer application method In addition to source of nutrients, time of application and doses, the method of fertilizer application is also important in nutrient management. Fertilizers must be equally distributed on the root zone area from 30 cm tree trunk to drip line in mango trees.

  14. Fertilizer application method After broad casting, fertilizers should be incorporated thoroughly to the soil by cultivating the top soil. Care should be taken not to damage the roots. Urea must only be applied when the soils are moist otherwise trees must be irrigated immediately after urea application. Click

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