Irrigation Water management Irrigate immediately after sowing followed by life irrigation at 5-7 days after sowing Critical stages of irrigation: One at pre-flowering stage (25 DAS) One at peak flowering stage (35-45 DAS) One or two irrigations at pod setting

Water Management - Drip Irrigation Irrigation once in 2 days Irrigation based on climatological approach Irrigation volume = Pe x Kp x Kc x A x Wp – Re Pe – Pan evaporation rate (mm/day) Kp – Pan co-efficient (0.75 to 0.80) Kc – Crop co-efficient (0.4 – Vegeta

Semaisamy Semaisamy T.Alankulam Village Sivagangai District Drip irrigation Success Story Padithurai Mudur Village Sivagangai District T.Alankulam Village Sivagangai District Padithurai Mudur Village

Function : For making temporary channels for irrigation Specifications I. Power requirement, hp Tractor,35 and above II.Size of channel bund, mm 350 III. No. of forming blades 4 IV. Weight (kg) 150 - 200 V. Coverage, ha per day 4 - 5 Cost of the unit (approx.)

First hand weeding on the 20th day of sowing and if necessary 2nd hand weeding between 35 - 40 days after sowing.

One hand weeding on 45 DAS will keep weed free environment upto 60 DAS

Weeds are problamatic both in rainfed and irrigated chickpea because of its short growing nature. Weed problems is severe under irrigated than in rainfed conditions. Weed problem in rainfed crop can be minimised with intercultivation since the crop is drilled

The suitability of irrigation water is mainly depends on the amounts and type of salts present in water. The main soluble constituents are calcium, magnesium, sodium as cations and chloride, sulphate, biocarbonate as anions. The other ions are present in minut

Rainfall is the primary sources of water for irrigation. It is not available though out the year. The stored rain water either in tank or in sub-surface is used as resources of irrigation water for an indefinite period. Following are the sources of irrigation

Irrigation is the artificial application of water to the soil for growth of plants.

The various irrigation sources may be classified into river, tank and well irrigation systems.

Form beds of size 10 m2 or 20 m2. The irrigation channels are to be provided sufficiently.

Crop (5cm depth at each irrigation) Crop Duration Total Water Requirement (mm) Rice 110 1250 Sugarcane 360 2200 Groundnut 105 510 Sorghum 105 500 Maize 100 500 Ragi 95 310 Cotton 165 600 Blackgram 65 280 Soybean 85 320 Sesame 85 150 Sunflower 110 450 Duration

Form ridges and furrows 50 cm apart using ridger and irrigation channels across furrows.

Water requirement: 400-450 mm Stages No. of irrigation Days of transplanting/sowing of crop Direct sown Light soil Irrigate for germination 1 1st day Establishment 2 4th , 15th day Vegetative phase 1 28th day* Flowering stage 3 40th , 52nd & 64th day* Maturity

Even as advanced pressure irrigation method, such as drip and sprinkler systems are in vogue the traditional gravity surface irrigation methods still remain inevitable due to their simplicity in layouts and low installation and operational expenses. However th

Irrigate immediately after sowing followed by an irrigation on 4 - 5th day and later at intervals of 7 to 8 days according to soil and climatic conditions, seeding, flowering and seed development stage (ie) two weeks before and after flowering.

Quality of irrigation water The suitability of irrigation water is mainly depends on the amounts and type of salts present in water. The main soluble constituents are calcium, magnesium, sodium as cations and chloride, sulphate, biocarbonate as anions. The oth

Irrigate the crop depending upon the need during different phases of the crop.

Irrigation Tropical sugarbeet is very sensitive to water stagnation in soil at all stages of crop growth. Irrigation should be based on soil type and climatic condition. Pre-sowing irrigation is essential since at the time of sowing, sufficient soil moisture i

Water requirement of field crops with sprinkler irrigation system:

Water Management Irrigate immediately after sowing. Give life irrigation on the 3rd day. Further irrigations at intervals of 7 - 10 and 10 - 15 days during summer and winter season respectively may be given depending on soil and weather conditions. Soybean is

Form ridges and furrows (using a ridger) 6 m along and 1 m apart and irrigation channels across the furrows.

NOTE: Do not allow cracks to develop in the nursery by properly adjusting the quantity of irrigation water.

So, water is applied externally, if availability seems limited through soil, not sufficient to meet the requirement due to drought or excess losses. We call the external application of water to the soil to supplement the requirement as ` Irrigation '.

Water management During first one week just wet the soil by thin film of water. Depth of irrigation may be increased to 2.5cm progressively along the crop age. Afterwards follow the schedule as given to transplanted rice. Home | Seasons & Varieties | Tillage |

Sow the sprouted seeds uniformly on the seedbed, having thin film of water in the nursery.

Alternate wetting and drying (irrigate after development of hairline crack)

Water management As that of irrigated rice when canal water is used for irrigation Possibility of subsequent conversion towards deep water situation is seen in this tract, then variety should be specific for those areas. Home | Seasons & Varieties | Tillage |

Irrigate immediately after sowing, 3rd day after sowing, bud initiation, 50 % flowering and pod development stages. Water stagnation should be avoided.