Antagonistic effect of 12 isolates of 3 Trichoderma strains (T. virens, T. viride, T. harzianum) against the collar rot disease-causing fungus A. niger, was studied in vitro. It was observed that T. viride 60 inhibited maximum (86.2%) growth of test fungus, followed by T. harzianum 2J (80.4%). The five varieties of groundnut grown in normal (T 1 ), sick -A. niger infested soil (T 2 ) and sick + Trichoderma viride 60 (seed treatment) (T 3 ) in pot culture showed significant differences in the per cent of disease incidence of collar rot, up to 15 days after sowing (DAS). The per cent of collar rot disease incidence was higher in the GG-20 (67.4%) variety, followed by moderate in GAUG-10 and GG-13 (46%), and minimum in J-11 and GG-2 (30%) in A. niger infected pot culture, at 15 days after sowing (DAS).Based on collar rot disease incidence, groundnut varieties were screened as: susceptible, moderately susceptible and tolerant. Trichoderma seed treatment (T 3 ) reduced 51.6% of the disease incidence in susceptible varieties and 58.1% in tolerant varieties, at 15 DAS, under A. niger infection (T 2 ) in pot culture study.

The present study pertains to the effect of Integrated Nutrient Management (INM) techniques on seed cotton yield, economics and soil physico-chemical properties under rainfed condition. The 10 different treatments combinations comprising of organic and inorganic fertilizers (NPK), gypsum, castor cake, compost and vermi-compost were studied. The experimental result showed that the significantly highest seed cotton yield and highest net return were recorded under treatment T 9 (80 kg haG 1 + 10 t compost haG 1 +500 kg castor cake haG 1 + bio-fertilizer-Azotobacter+ PSM). The effect of different treatments on EC, organic carbon, available phosphorus and potash and sulphur status in the soil were found significant and the maximum availability of most of the micronutrients were recorded on account of application of compost at 10 t haG 1 + vermi compost at 1 t haG 1 + castor cake at 500 kg haG 1 + bio-fertilizer (Azotobacter+PSM). Bulk density of soil was found to reduced due to application of organic alone (i.e., compost at 10 t haG 1 , compost at 10 t haG 1 +vermi compost at 1 t haG 1 + castor cake at 500 kg haG 1 + bio-fertilizer (Azotobacter+PSM) or integration of organic and inorganic sources of nutrient (N at 80 kg haG 1 +castor cake 500 at kg haG 1 and N at 80 kg haG 1 +compost at 10 t haG 1 +castor cake at 500 kg haG 1 +bio-fertilizer.

The field experiment was conducted during kharif seasons of 2008-2013 on medium black soil at Dry Farming Research Station, Junagadh Agricultural University; Targhadia to study the effect of integrated nutrient management (INM) techniques on seed cotton yield, economics and soil physico-chemical properties under dry farming condition. The experiment was laid out in randomized block design with ten different treatment combinations comprising of organic and inorganic fertilizers (NPK), gypsum, castor cake, compost and vermi-compost replicated in a thrice. The experimental result showed that the significantly higher seed cotton yield (2298 kg/ha) and highest net return (` 98289/ha) were recorded under treatment T 9 (80 kg/ha + 10 tones compost/ha + 500 kg castor cake/ha + bio-fertilizer-Azotobacter + PSM). The highest number of branches/plant, numbers of balls/plant and plant height (cm) were also recorded under treatment T 9 .