A field experiment was conducted at Organic Farming Research Farm, Department of Agronomy, College of Agriculture, Junagadh Agricultural University, Junagadh (Gujarat) in summer season of 2017 to 2019. Geographically, Junagadh is situated at 21.5° N latitude and 70.5° E longitude with an altitude of 60 m above the mean sea level. The soil of the experimental plot was clayey in texture and slightly alkaline in reaction (pH 7.9 and EC 0.35 dS/m) having bulk density of 1.40 Mg/m
3 as well as low in organic carbon (0.41%), available nitrogen (242 kg/ha), available phosphorus (27.3 kg/ha) and medium in available potash (299 kg/ha). The weather parameters
viz., maximum temperature (29.2-42.2°C), minimum temperature (12.1-27.4 °C), relative humidity (morning 52-82% and evening 17-46%), wind speed (4.0-9.5 km/h), bright sunshine (7.4-11.0 h) and evaporation (5.5-11.7 mm/day) remained favourable for the crop. The experiment comprised of 10 treatments
viz., T
1:
Panchagavya as foliar spray @ 3% at 30, 45 and 60 DAS, T
2:
Bijamrut as seed treatment @ 300 mL/kg seed, T
3:
Jivamrut @ 500 L/ha with irrigation at sowing, 30 and 45 DAS, T
4:
Amrutpani @ 500 L/ha with irrigation at sowing, 30 and 45 DAS, T
5:
Sanjivak @ 500 L/ha with irrigation at sowing, 30 and 45 DAS, T
6: Seaweed extract as foliar spray @ 3.5% at 30, 45 and 60 DAS, T
7: Banana sap as foliar spray @ 1% at 30, 45 and 60 DAS, T8: Cow urine @ 500 L/ha with irrigation at sowing, 30 and 45 DAS, T
9: FYM @ 5 t/ha and T
10: Control was laid out in randomized block design with three replications. The gross and net plot size were 5.0 m × 2.4 m and 4.0 m ×1.8 m, respectively. The groundnut variety “GJG-31” was sown during February at 30 cm × 10 cm using seed rate of 120 kg/ha. The cow-based formulations were prepared on farm by following the procedure given by National Centre for Organic Farming, Ghaziabad
(NCOF, 2006).
Panchagavya
Fresh cow dung (5 kg) was mixed with ghee (1 L) and kept in a plastic barrel separately for three days. On the same day, other ingredients, namely cow urine (3 L), cow’s milk (2 L), curd (2 L), yellow banana (400 g, without skin), coconut water (3 L), jaggery (1 kg dissolved in 3 L water) were mixed in a plastic barrel separately. Filtered jaggery solution was added to the other ingredients. On the third day, the contents of both the barrels were mixed and left aside for seven days. The content was stirred with a wooden stick twice a day. After seven days, the product was filtered with a
khada or terracot (TC) cloth and stored in closed containers (Pierce small holes in the cap of the containers to prevent bursting). This is diluted @ 300 mL/10 L water and sprayed.
Bijamrut
Cow dung 5 kg, cow urine 5 L, cow milk 1 L, lime 50 g, water 20 L and handful soil from rhizosphere area of banyan tree were mixed and kept overnight. The formulation was sprinkled on seeds to be sown, then dried in the shade before sowing.
Jivamrut
100 L water was taken in barrel and 10 kg cow dung + 10 L cow urine were added, mixed well with the help of a wooden stick and 2 kg old jaggery and 2 kg pulse flour (gram, pigeonpea, greengram, cowpea or blackgram) and handful soil from rhizosphere area of banyan tree were added. This solution was mixed up well with a wooden stick. The solution was kept aside for fermentation for two to seven days. The solution was regularly shaked three times a day.
Amrutpani
10 kg cow dung and 500 g honey were thoroughly mixed to form a creamy paste. 250 g of ghee was added and mixed at high speed. The content was diluted with 200 L water. This suspension was sprinkled in one acre over soil or with irrigation water.
Sanjivak
100 kg cow dung, 100 L cow urine and 500 g jaggary were mixed in 300 L water in a 500-L closed drum and fermented for 10 days. It was used as soil application either by sprinkling or by applying through irrigation water. Three applications were given; one day before sowing, 30 days of sowing and 45 days of sowing.
The banana pseudo stem extract was obtained from Soil and Water Management Unit, Navsari Agricultural University, Navsari (Gujarat) and seaweed extract (
Kappaphycus alvarezii) from Fisheries Research Station, Junagadh Agricultural University, Okha (Gujarat). Foliar spraying was done using knapsack sprayer with spray volume of 500 L/ha. The crop was raised as per organic standards in organically converted plot. Pest and disease protection measures were taken using organic/bio-pesticides. The experiment was laid out in the organic plot (maintained since 10 years) and the treatment of chemical fertilizers was kept outside the organic plot. Eight irrigations each of 5 cm depth were applied at 1.0 IW:CPE and plant protection measures were taken as per need using bio-pesticides. The growth and yield attributes were recorded from the five tagged plants in each plot. Seed and stalk yield were recorded from the net plot area and converted into quintal per hectare base. Soil and plant analysis was carried out adopting standard methods. The gross realization in terms of rupees per hectare was worked out taking into consideration the pod and haulm yields from each treatment and local market prices. The expenses incurred for all the cultivation operations from preparatory tillage to harvesting including the cost of inputs
viz., seeds, fertilizers, pesticides,
etc. applied to each treatments along with the treatment cost were calculated on the basis of prevailing local charges. Net return of each treatment was calculated by deducting the total cost of cultivation from the gross returns. The Benefit : Cost (B:C) ratio was calculated by dividing gross returns by total cost of cultivation.
The data were subjected to statistical analysis by adopting appropriate analysis of variance (
Gomez and Gomez, 1984). Wherever the F values found significant at 5 per cent level of probability, the critical difference (CD) values were computed for making comparison among the treatment means.