What is the difference between basal dressing and foliar spraying

Methods of fertilizer application Download Now Download Download to read offline. Updated CV of DR. Integrated Nutrient Management.

Classification of field crops. The Chi Square Test. Tests of Significance: The Basics Concepts. Agro ecology Concept. Irrigation system of Pakistan.

Major crops of Pakistan. Farm machinery used in Pakistan for ploughing and cultivation. Related Books Free with a 30 day trial from Scribd.

Related Audiobooks Free with a 30 day trial from Scribd. Attah Dominic. Mehedi Naeem. Appu Khot. Kishore Yadki. Wesley Edmond. Deepak Shukla. Joel Clement. Un Knows. Angelica Mirando. Shekhar Jadhao. Sunil Raju Vanipenta. Show More. The change in velocity V 2 from V 1 due to constriction in venturi pipe diameter causes suction change in pressure from P 1 to P 2 below atmospheric pressure, thereby suction of fertilizer solution. Figure Very simple to operate, no moving parts.

Easy to install and to maintain. Suitable for very low injection rates. Injection can be controlled with a metering valve. Creates considerable pressure loss in irrigation pipe line and sometimes a booster pump is required. Quantitative fertigation is difficult.

Automation is difficult. In this method a pump is used to lift the fertilizer stock solution from the storage tank and inject it under pressure in a pipe carrying irrigation water. The injection rate can be set to create a desirable mixing ratio.

The fertilizer solution is normally pumped from an unpressurised storage tank. Pumping is a common method of injecting fertilizer into a drip irrigation system. Fertilizer pumps are driven by electricity, internal combustion engines, tractor PTO or hydraulically the inherent water pressure in the irrigation system. Hydraulic pumps are versatile reliable and low operation and maintenance costs. A diaphragm or piston movement injects the fertilizer solution into the irrigation system.

Positive injection pumps include single or multiple piston pumps, diaphragm pumps, gear pumps, and roller pumps. Where two or more different types of fertilizers are required, multiple pump units can be used to avoid or reduce precipitation problems. All of the injection pumps can be regulated to achieve the desired rate of application, usually by adjusting the length of stroke of the piston pump or by selecting the appropriate pulley diameter.

Another means of adjusting fertilizer application is with variable-speed motors. The system should flush itself with clean water at least once after injecting the fertilizer solution. The major advantages of the system are flexibility and high discharge rate, the system does not add to the head loss in a pressurized irrigation system and that it maintains a constant concentration of nutrients throughout the period of fertilizer application.

High equipment cost and high operation and maintenance costs Michael, are the limitations of this method of fertigation. Michael, A. Ltd, Noida, U. James, L. New York. Rajput, T. Site news. Module 1. Module 2. Drip Irrigation System Design and Instal Module 3. Sprinkler Irrigation. Lesson Fertigation System Design.

Fertilizers Application Methods. Module 5. Module 6. Automation of Micro Irrigation System. Module 7.

Fertilizers Application Methods Fertilizers are substances containing chemical elements that improve the growth of plants. Disadvantages of broadcasting The main disadvantages of application of fertilizers through broadcasting are: i Nutrients cannot be fully utilized by plant roots as they move laterally over long distances.

The most common methods of placement are as follows: a Plough sole placement In this method, fertilizer is placed at the bottom of the plough furrow in a continuous band during the process of ploughing.

The common methods to place fertilizers close to the seed or plant are as follows: Drilling: In this method, the fertilizer is applied at the time of sowing by means of a seed-cum-fertilizer drill. Side dressing: It refers to the spreading of fertilizer in between the rows and around the plants. The common methods of side dressing are: 1 Placement of nitrogenous fertilizers by hand in between the rows of crops like maize, sugarcane, cotton etc. There are two types of band placement of fertilizer and these are stated below: a Hill placement It is practiced for the application of fertilizers in orchards.

The disadvantages of starter solutions are i Extra labour is required, and ii The fixation of phosphate is higher. Pressure Differential The Venturi vacuum Injection pump Bonemeal supplies phosphorus. Seed meals typically supply nitrogen, plus lower amounts of phosphorus and potassium. Fertilizer Method 2: Foliar Feed Foliar feeding is the fertilizer method in which you directly apply a diluted liquid fertilizer to the leaves of the plant.

The plant absorbs the nutrients in the fertilizer spray directly through the leaves. If amending the soil is like making sure your plants have enough food to eat, then foliar feeding is like giving your plants a shot of liquid vitamins.

Plants primarily absorb nutrients through their roots, and the amount and types of nutrients that can be absorbed via the leaves is quite limited. However, acute nutrient deficiencies can often be identified and corrected more rapidly via foliar fertilization than slower-uptake soil amendments.

Making Foliar Feeds Work Healthy plant leaves have a waxy coating called the cuticle. This allows water to bead up and run off the leaf, dripping down and naturally irrigating the drip line of the plant.

Foliar sprays must have a wetting agent added that allows them to penetrate that waxy coating. Commercial spray fertilizers will typically include a wetting agent, but DIY types can add a few drops of biodegradable liquid dish detergent to each gallon of dilute foliar fertilizer. True foliar feeding, with fertility delivered solely through the leaves, is quite unusual in a backyard setting. Typically, when liquid feeds are used in a garden setting, plants are sprayed heavily.

The vast majority of the liquid feed drips down to the soil, where it penetrates the soil and can be taken up by the roots. In this way, it becomes more like a liquid side-dressing or soil drench feed to the roots than a true foliar feed.

Is It For You? Foliar feeds are ideal to correct specific nutrient deficiencies very quickly. Calcium, iron, potassium and zinc deficiencies respond particularly well to foliar feeds.

Foliar feeds must be reapplied frequently unless underlying soil deficiencies are corrected, and the spray solutions risk burning delicate leaf tissue unless fertilizer concentrations are carefully measured. Not all nutrients and nutrient blends are well suited to foliar feed delivery, and typically products designed for foliar application are more expensive than equivalent soil-feed fertilizers. Go-to Foliar Feeds All foliar feeds work best when delivered in a very fine mist.

A wetting agent is essential to help the feed stick to the leaves long enough to be absorbed. My favorite all-purpose foliar feed and soil drench is organic fish emulsion. Kelp based foliar feeds are popular because they are a rich source of micronutrients.