Date:-27/07/2024
Preparing a 2 tank for DWC hydroponics
Paint the tank
Date:-28/07/2024
Holes were made in the sheet of thermocol for planting
Date :- 29/07/2024
1500 liters of water were added to the tank, and a quantity of chemical fertilizer was given.
Hydroponic Nutrients:
- Nitrogen (N)
- Phosphorus (P)
- Potassium (K)
- Calcium (Ca)
- Magnesium (Mg)
- Sulfur (S)
- Micronutrients (Fe, Zn, Cu, etc.)
Before EC & PH
EC=950 , PH=10.0
Fertilizer Dosing:-
- Urea = 64.5 gm
- 13:00:45 = 636 gm
- 00:52:34 = 85.5 gm
- Mgso4 = 361.5 gm
- Ca,ni = 724.5 gm
- Ferrous = 24.9 gm
- Micronutrients = 1500 ml
After EC & PH
EC=2000,PH=10
Net cup :- A net cup is a small container with a mesh or grid-like structure, usually made of plastic. It holds the plant and growing medium (like clay pebbles or coco coir) while allowing water and nutrients to flow freely around the roots.
Coco coir :- Coco coir (or coco peat) is made from the fibers of coconut husks. It’s processed and cleaned to create a fluffy, soil-like medium that holds moisture well and provides good aeration for roots.
Date :- 01/08/2024
thermocol sheet :- In a DWC setup, the thermocol sheet floats on the nutrient solution, and net cups are inserted into holes cut in the sheet. The roots of the plants dangle into the water below, absorbing nutrients and oxygen.
Lettuce planted in net cups on thermocol sheets, which were then left in the tank.”
Date :- 25/08/2024
Lettuce First Harvesting Tank -A = 1.200 gm
Date :- 26/08/2024
Lettuce First Harvesting Tank -B = 1.300 gm
Date :- 29/08/2024
Lettuce Harvesting Tank -A = 700 gm
Date :- 30/08/2024
Lettuce Harvesting Tank -B = 800 gm
Date :- 04/09/2024
Lettuce Harvesting Tank -A = 630 gm
Date :- 05/09/2024
Lettuce Harvesting Tank -B = 580 gm
Date :- 04/09/2024
Lettuce Harvesting Tank -A = 600 gm
Date :- 05/09/2024
Lettuce Harvesting Tank -B = 570 gm
Date :- 09/09/2024
Lettuce Harvesting Tank -A = 800 gm
Date :- 10/09/2024
Lettuce Harvesting Tank -B = 1 kg
Date :- 12/09/2024
Lettuce Harvesting Tank -A = 930 gm
Date :- 13/09/2024
Lettuce Harvesting Tank -B = 1.100 gm
16/09/2024
ROOT GROWTH ANALYSIS OF LATTUCE IN DWC TANK :
After taking the measurements, the average of all the values was calculated
Tank A : Average = 30cm
Tank B: Average= 23.86cm
17/09/2024
To maintain the aeration within tanks, we connected pipes to circulate the water from tank A to B and B to A simultaneously, bubbler was also submerged in tanks to increase aeration and maintain oxyge
Cleaned water tank of NFT system and covered with black polythene sheet to avoid formation of algae on water surface as it takes nutrients in water which will further affect the EC, pH and overall growth.
18/09/2024
Electric Conductivity (EC) : In hydroponics, electric conductivity is measure of conductance/conductivity within your hydroponics nutrient solution.
EC- (i) Tells number of available nutrients in solutions
(ii) Determine how much food your plants receive, and how well they can absorb it.
PH :pH is a scale of measurement to detect the acidity or alkalinity of a solution. It is important in hydroponics because pH affects the availability of nutrients to plants. Plants have optimal pH ranges where they effectively absorb nutrients. pH levels outside this range are detrimental to the plant.
For optimal growth, hydroponic lettuce should be grown at a pH between 5.5 and 6.0, with 5.8 being the ideal value.
Determined the EC and pH of Tank A and Tank B in DWC system (Lettuce) with the help of digital EC and pH meter
Tank A –
Water temperature -26°C
EC-2116
Digital pH meter-6.45
pH meter-9.21
Tank B-
EC-2226
Digital pH meter – 6.65
pH meter -9.78
(Note :Above EC and pH reading are not accurate as digital EC and pH meter was not calliberated .
21/09/2024 -24/09/24
On this date, over growth of lettuce plants of tank A were seen, then Pranit and I cut the leaves of those plants .
After harvesting lettuce leaves we observed the growth of roots. Then it was analyzed whether new roots come to that stem or not.
After 2 days we made an analysis it was found that the root growth of 95% stems were rotted. The remaining 5% stems got new leaves grown on them hence it was concluded that the root growth of that stems was happening.
These photos are of the growth of new leaves on stem and their roots:
These photos are roots growth of rotten stem’s :
25/09/24
On this date,Due to the overgrowth of the plants in tank B and the life of the plants ended, the leaves of those plants were infected with worms and bacterial infection.
Then the leaves of those plants were removed from tank B.
Date :- 29/09/2024
Total Harvesting
Tank A = 6.060 gm
Tank B = 6.250 gm
Conclusion :- या Trial मध्ये आम्ही लेट्युस साठी पाण्यामध्ये किती Dissolved oxygen ( DO) हवा आहे आणि गरजेचा आहे का यावर काम केले पण आम्हाला यातून एवढेच conclusion कळाले कि हायड्रोपोनिक मध्ये Dissolved oxygen ( DO) गरजेचा आहे यामुळे रोपांच्या पांढऱ्या मुळांची वाढ चांगली होते आता रोपांचे वाढण्याचे वय निघून गेल्या मुळे आम्ही संपूर्ण रोपे काढून टाकून परत नवीन रोपे लावण्याचे ठरले .
New batch started
Date :- 02/10/24
On this date Tejasvi and me removed the sheets from the tank and the stems from the cups and separated the coco fibre from them and cleaned them as they were to be used for the plantation.
In this trial, we took 3 different tanks, A, B, and C
1.A tank was in a polyhouse
2.Bubbler was not
installed in A Tank.
1.B tank was in a polyhouse
2.Bubbler installed in B Tank.
1.C tank was oute side
2.Bubbler installed in C Tank.
Date:- 10 /10 /24 to 16/10/24
On this date, new plants of lettuce were brought, then we cleaned the water in the tank and did set up of new plantation on DWC system .Then measure water in both tanks before planting lettuce in DWC system After filling the tank with water, Then in tank a we put the t joint to the motor, Then measure the EC and Ph of that water.
Tank A :
1650 litter water filled in Tank A
EC:621
PH:10.55
Tank B:
1580 liter water filled in Tank B
EC:618
While planting , me and Tejasvi calculated dosing of 25% nutrients . We started dosing nutrients from 25%, then after 3 days 25% nutrients were added and next day 50% of nutrients were added to the water tank, likewise 100% dosing was completed. Then after two days we maintained the ph of water by adding the Phosphoric Acid to the water tank.
Nutrients required for dosing are as follows:
Urea
13:00:45 (Nitrogen ,Phosphorus ,Potassium )
00:52:34 (Mono Potassium Phosphate)
MgSO4
Calcium ,Nitrate
Ferrous
Micronutrients
Transplanted lettuce saplings from cocopeat to cup containing coco coir media which will provide a support to a sapling and inserted in thermacol sheets.
Next we will analyze the weight gain by plants in each week.
| Tank A | Tank B | |
| Before adding the nutrients in water (10/10/24) | EC:621 PH:10.66 | EC:618 PH:10.84 |
| After adding 25% nutrients in water (11/10/24) | EC:884 PH:10.48 | EC:895 PH:10.60 |
| (12/10/24) | EC:888 PH:10.72 | EC:883 PH:10.74 |
| Add Phospheric Acid To Maintain PH (13/10/2) | EC:896 PH:6.41 | EC:870 PH:6.48 |
| (14/10/24) | EC:875 PH:6.52 | EC:866 pH:6.76 |
| Add 25% nutrients in water tank (15/10/24) | EC:1156 PH :6.59 | EC:1124 PH:6.84 |
| Again add 50% nutrients in water tank(16/10/24) | EC:1677 PH: 6.5 | EC:1630 PH: 6.7 |
| First Harvesting (02/11/24) | 1 kg | – |
| Harvesting (03/11/24) | – | 1.200 gm |
| Harvesting (07/11/24) | 800 gm | – |
| Harvesting (08/11/24) | – | 1kg |
| Harvesting (12/11/24) | 1.150 gm | – |
| Harvesting (13/11/24) | – | 1.250 gm |
| Harvesting (17/11/24) | 1 kg | – |
| Harvesting (18/11/24) | – | 900 gm |
Date:- 19/11/24
first of all three Plant in each sheet were tied with three different colored rubber bands so that the trees from which the readings were to be taken could be identified.
(Note: Yellow colored rubber band – 1st , Red colored rubber band – 2nd , Green colored rubber band – 3rd)
Date:- 20/11/24
Today I measured the height of lettuce leaves and roots and checked the EC & Ph in tank A, B, &C with the help of EC meter.
| Tank C | Root height (cm) | leaf height (cm) |
| 1 | 18 | 16 |
| 2 | 23 | 18 |
| 3 | 23 | 16 |
| Tank | EC | PH |
| A | 1673 | 6.83 |
| B | 1776 | 7.10 |
| C | 1990 | 7.93 |
Then the damaged lettuce leaves were removed.
1.583 kg from Tank A Bad leaves were removed and 2.29 kg of leaves were removed from tank B
Date:- 22/11/24
As the EC in tank A and tank B fell below 2000, 50% dosing was done in tank A and tank B
| Tank A | 1650 liter water | Tank B | 1580 liter water | |
| 1 | Calcium Nitrate | 214.5 gm | Calcium Nitrate | 205.4 gm |
| 2 | D.A.P | 43.725 gm | D.A.P | 41.87 gm |
| 3 | Potassium Nitrate | 511.5 gm | Potassium Nitrate | 489.8 gm |
| 4 | Magnesium sulphate | 342.375 gm | Magnesium sulphate | 327.85 gm |
Date:- 23/11/24
| Tank | EC | PH |
| A | 1928 | 6.91 |
| B | 2093 | 7.19 |
| C | 2045 | 8.19 |
Since the EC in tank A is less than 2000, 25% dosing was done in tank A
| No. | Tank A | 1650 liter water |
| 1 | Calcium Nitrate | 107.25 gm |
| 2 | D.A.P | 21.86 gm |
| 3 | Potassium Nitrate | 255.75 gm |
| 4 | Magnesium sulphate | 171.187 gm |
Date:- 24/11/24
EC and PH readings after dosing are as follows:
| Tank | EC | PH |
| A | 2076 | 6.75 |
| B | 2106 | 7.02 |
| C | 2079 | 8.09 |
1.5 kg Lettuce was harvested and given to the kitchen
Date:- 27/11/24
| Tank C | Root height (cm) | Leaf height (cm) |
| 1 | 23 | 28 |
| 2 | 24 | 24 |
| 3 | 16 | 15 |
Date:- 28/11/24
Dissolved oxygen from hydroponic water tank
- Tank A – 0mg/L
- Tank C – 5.6mg/L
- Tank B – 4.4mg/L
Date:- 3/12/24
| Tank c | root height | leaf |
| 1 | 30 | 17 |
| 2 | 32 | 10 |
| 3 | 16 | 9 |
| Tank | PH | EC |
| A | 6.68 | 2116 |
| b | 6.85 | 2135 |
| c | 7.2 | 2160 |
Date:- 8/12/24
| Tank C | roots height | leaf height |
| 1 | 29 | 16.5 |
| 2 | 29.5 | 18 |
| 3 | 16.5 | 14 |
| Tank | Ph | EC |
| A | 6.76 | 2176 |
| B | 7.02 | 2106 |
| C | 8.09 | 2079 |
Date:- 15/12/24
| Tank C | roots height | Leaf height |
| 1 | 31 | 14 |
| 2 | 29 | 20 |
| 3 | 19 | 21 |
| Tank | ph | EC |
| A | 6.66 | 2107 |
| B | 7.14 | 1846 |
| C | 7.46 | 3746 |
Since the EC in B tank was less than 2000, 25% dosing was done in B tank
ph in Tank B and C went above 6.5 so 10gm citric acid was used to lower the ph.
Root growth.
Conclusion :-
Tank – A मध्ये Bubbling System बसवलेली नव्हती त्यामुळे Dissolved Oxygen (DO) तपासल्यानंतर त्याचा DO = 0mg/L इतका आला पाण्याचा कमी असल्यामुळे रोपांच्या पांढऱ्या मुळांची वाढ खूपच कमी होती .
Tank – B मध्ये Bubbling System बसवलेली होती त्यामुळे Dissolved Oxygen (DO) तपासल्यानंतर त्याचा DO = 4.4mg/L इतका आला पाण्याचा चांगला असल्यामुळे रोपांच्या पांढऱ्या मुळांची वाढ खूपच जास्त झालेली होती .
आणि दोन्ही पॉलीहाऊस मध्ये असल्यामुळे त्यांची चांगली होती पेक्षा ची थोडी जास्त होती याउलट पॉलिहाऊस मध्ये नव्हता तो बाहेर उन्हात होता यामुळे लेट्युस ची चांगली झाली नाही .
Tank – C मध्ये Bubbling System बसवलेली होती त्यामुळे Dissolved Oxygen (DO) तपासल्यानंतर त्याचा DO = 5.6mg/L इतका आला पाण्याचा चांगला असल्यामुळे रोपांच्या पांढऱ्या मुळांची वाढ जास्त झालेली होती
