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A study was conducted during 2009 to 2010 and 2010 to 2011 to find out the effect of irrigation and fertigation scheduling on growth and yield of guava (Psidium guajava L.). The experiments were laid out in factorial randomized block design with sixteen treatment combinations which included four irrigation levels (basin, 50, 75 and 100% irrigation of irrigation water/cumulative pan evaporation) along with four fertigation levels, including, basal dose, 50, 75 and 100% water soluble fertilizers and replicated thrice. The nitrogen, phosphorus and potassium (NPK) fertilizers were applied through fertigation as well as soil application to test various attributes of 3-years-old guava cv. Shweta under meadow (ultra high density) orcharding. The investigation indicated that 100% irrigation of irrigation water/cumulative pan evaporation (I 3) through drip resulted in maximum plant height (1.97 m), canopy volume (0.98 m 3), girth of primary branches (2.41 cm), leaf area (62.94 cm 2) and fruit weight (163.71 g). However, I 2 (75% irrigation of irrigation water/cumulative pan evaporation) resulted in maximum plant spread east westnorth south (1.91 to 1.79 m), fruit yield/plant (5.87 kg) with benefit:cost ratio of 2.62. Use of 60, 30 and 30 g NPK/plant/year produced maximum leaf area (63.39 cm 2), fruit weight (162.43 g) and fruit yield/plant (6.01 kg). Interaction effect of irrigation and fertigation levels showed that 100% irrigation of irrigation water/cumulative pan evaporation + 100% water soluble fertilizers gave maximum plant height (2.07 m), canopy volume (1.24 m 3), girth of primary branches (2.48 cm), leaf area (66.08 cm 2), fruit diameter 6.69 cm (polar) and 5.97 cm (equatorial), fruit weight (182.17 g), yield/plant (6.59 kg). However, maximum benefit:cost ratio of (2.91) was obtained as 75% irrigation of irrigation water/cumulative pan evaporation + 75% water soluble fertilizers.

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An experiment was conducted on Effect of humic acid and nutrients mixture on growth and yield parameter of Tomato (Lycopersicon esculentum Mill.) under polyhouse condition at Rajasthan College of Agriculture, Udaipur (Raj.). The data was analyzed statistically following completely randomized design. The results revealed that treatment T7 [(RDF + humic acid 10 kg/ha soil application + humic acid 0.1% foliar spray + nutrient mixture foliar spray (0.2% Ca + 0.5% Mg + 0.2% B + 0.5% Zn)] was recorded superior to enhance leaf nutrients analysis Ca (1.656%), Mg (0.763%), Zn (25.07ppm) and B (61.94ppm), fruit nutrient analysisCa (1.904%), Mg (0.877%), Zn (58.98ppm) and B (61.84ppm), total Soluble Solids (TSS) (6.020%), ascorbic acid content (39.85mg/100g), lycopene content (3.75 mg/100g) and cost benefit ratio (4.81).