Micro Irrigation

[amol_gaikwad]

Dear All,

I want to know more regarding Micro Irrigation (sprinkler)

It,s cost, implt. time requried,

usable for crops,

& govt subsidies in MAHARASHTRA.

[vikasmanhas7]

Dear Amol,

Sprinkler Irrigation:

It is proposed to provide financial assistance @ 50% of the unit cost for various spaced crops. The financial assistance of 50% would be jointly shared between the centre and state governments in the ratio of 80:20. In other words, 80% share (40% of unit cost) will be met by the centre, and the balance 20% (10% of unit cost) will be met by the respective states. The beneficiaries may contribute the balance 50% of the unit cost, either through his/her own resources, or through soft loan(s) from any financial institutions.

The pattern of assistance would be 50% of the total cost subject to a maximum ceiling of Rs. 15,000/- per ha for small, Marginal, SC, ST and women farmers and 33% of cost subject to a maximum of Rs. 10,000/- per ha for other category farmers. The assistance would be available for a maximum area of 2.00 ha per beneficiary family.

Since sprinkler sets, unlike drip system, are moveable, only those farmers who have not availed of assistance for sprinkler irrigation from any other scheme would be eligible for assistance under this scheme. Depending upon the type of crop a farmer can avail assistance for sprinkler as well as drip irrigation the combined area of which should not exceed four ha per beneficiary. However, assistance for both sprinkler and drip irrigation will not be available for a single crop being cultivated by the farmer.

Advantages of sprinkler irrigation:

•Suitable for most soil types when application rates are matched to soil infiltration
capacity.
•Can be used on marginal soils such as those with low infiltration or low waterholding
capacity.
•Provides good control of water application, which can reduce vegetative growth
and improve the product quality (eg. onion bulbs and taproot quality of carrots).
•Reduces effects of wind-blown sandy soils on young crops.
•Provides a high degree of flexibility in design and operation, and can be
automated to save labour and energy expenditure.
•Nutrients can be applied through the irrigation system (fertigation).
•Can be used to cool the crop during heat waves, to protect against frost and to
manage plant health (eg reduces the impact of Aspergillus black mould near
harvest in onions).
•Has the ability to keep soil soft for emerging seedlings with frequent short
irrigations.
•With proper drainage, sprinklers can be used efficiently to flush accumulated salts
down the profile.
•Promotes rapid germination and crop establishment.

System design and operation:

Sprinkler systems are composed of a single network of pipes and sprinkler nozzles.
The pipes convey water to their destination under regulated pressure. A basic fixed
sprinkler system comprises sprinkler nozzles, riser pipe, laterals, sub-mains, mains,
pressure or flow regulators, filter, fertiliser injector and pump.
The soil type, crop and cultural practices determine sprinkler size and spacing. For a
fixed system, generally the spacing ranges from 5m x 5m to 20m x 20m, while
application rates are between 4 and 10 mm/hr. Good filtration of water is critical
for sprinkler system operation to minimise the incidence of sprinkler blockage.
The ability of a sprinkler system to apply water uniformly across the irrigated area is a
major factor influencing crop growth and yield [8]. Significant effort in sprinkler
irrigation system design and management is directed towards dealing with problems
related to irrigation uniformity, or the lack of it. The main factors that influence the
selection of the system and field layout include crop type, mode of operation, climate,
availability and quality of water, soil type and topography

Time Required:

For microsprinklers, it takes only 1-2 days for installation.
For big sprinklers it takes more than 2 days.

With Regards,

Vikas

[kirti s]

Dear Sir

Microirrigation gives early maturity, better quality & higher yield. Ideal for terrain with problematic soils & water. Saves labor cost. Yield increase up to 230%. Saves water up to 70%. Successfully working on more than 40 crops covering over 600 thousand acres.

Drip irrigation system delivers water to the crop using a network of mainlines, sub-mains and lateral lines with emission points spaced along their lengths. Each dripper/emitter, orifice supplies a measured, precisely controlled uniform application of water, nutrients, and other required growth substances directly into the root zone of the plant.

Water and nutrients enter the soil from the emitters, moving into the root zone of the plants through the combined forces of gravity and capillary. In this way, the plant’s withdrawal of moisture and nutrients are replenished almost immediately, ensuring that the plant never suffers from water stress, thus enhancing quality, its ability to achieve optimum growth and high yield.

[anilkaye]

Dear Mr Kirti,

From your various posts, I feel you are an expert on agricultural matters. Hence this question to you.

In drip irrigation, that I have seen in many places, I have noticed that the emitter is placed above ground and the water is dripped on the surface of the ground. This leads to some evaporation of the water and also growth of weeds, etc at the drip site.

Instead, why can't the emitter be buried in a small inverted can say one foot deep, so that water evaporation losses are elimated or minimised. As the can is inverted, it will still allow the emitter to drip water and evaporation and weed control will be minimised.

Is this thought/idea practical?

Regards

Anil Kaye

[doris mehra]

would like to know how i can get in touch with you regarding setting up of sprinklers i have a bit of land in mawal and am in the process of planting trees d mehra

[kirti s]

Dear Sir

Ya!!! Sir your right above groung placement leads to weeds, evaporation etc.But Placing the emitters above ground allows for observation during operation and easy replacement of defective emitters.

There are techniques for underground also

placing the emitters underground removes them from harvesting, pruning or coyote damage. When the emitters are placed 18 to 24 inches beneath the surface and directly in the row middle, weed growth is suppressed. Placing the emitters closer to the surface will allow moisture to reach the surface and support cover crop growth .

Underground placement of the emitters is usually achieved by using a shank to pull the tubing in the ground. Inline emitters are the most common type placed underground. Assuming proper filtration, the major concern with underground installations is plugged emitters, either from root intrusion or soil ingestion.

Kirti