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Chemical fertilization creates the ill effects on soil health and environment especially after green revolution. To mitigate such effects, the adoption of organic farming  might be an ecologically viable option. The present experiment was therefore, carried out with aim to study the effects of active silica on growth and yield attributes and their interrelationship   with each other during the Kharif season of 2018 and 2019 at Organic Unit of Instructional Farm, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur (Rajasthan). The experiment was laid out in split-plot design with three replications consisting of 36 treatment combinations of six soil applications in main plots (0, 50, 75, 100, 125, and 150 kg/ha) and six foliar applications of active silica in subplots (No spray, water spray, 0.25, 0.50, 0.75 and 1.0%). The analysis showed that dry matter accumulation at 60, 75 DAS, and harvest increase with plant height at 60, 75 DAS and harvest, respectively,  grains/cob and test weight showed positive correlation with grain yield. Stover yield also increased with increasing plant height and dry matter accumulation. Total N, P and K uptake significantly and positively increased with increasing biological yield; and protein content in grain increased with increasing N content. Si uptake increased significantly and positively with increasing Si content at 60, 75 DAS and harvest.

The present study aimed to determine the Sowing dates and varieties of wheat can affect yield, nutrient content in grain, straw and soil after crop harvest. A field experiment was conducted during Rabi season (2015-16) at Instructional Farm, Department of Agronomy, College of Agriculture JAU, Junagadh to evaluate the identification of the suitable date of sowing and variety of wheat (Triticum aestivum L.) for South Saurashtra, Gujarat under changing climatic conditions. The experiment consisted of 12 treatment combinations of four dates of sowing in main plots (05th November, 15th November, 25th November and 05th December) and three varieties in sub plots (GW 322, GW 366 and GW 173) was carried out in split-plot design with three replications. Significantly maximum grain yield, N, P and K in grain and straw was recorded with sowing on 15th November and with the sowing of GW 366. Higher available N, P2O5 and K2O in the soil after harvest was found on 05th December and GW 173.

A field experiment was conducted during Rabi season (2015-16) at Instructional Farm, Department of Agronomy, College of Agriculture Junagadh Agricultural University, Junagadh (India) to evaluate the identification of suitable date of sowing and variety of wheat (Triticum aestivum L.) for South Saurashtra (Gujarat). The **), test weight (r=0.995**), experiment was laid out in split plot design with four dates of sowing in main plots (05th November, 15th November, 25th November and 05th December) and three varieties in sub plots (GW 322, GW 366 and GW 173) and replicated thrice. The analysis showed positive correlation between grain yield and growth parameters viz, plant height at 60 DAS (r=0.932**) and harvest (r=0.940**), dry matter accumulation at harvest (r=0.976**), crop growth rate between 30 to 60 DAS (r=0.996**), root dry weight at 60 DAS (r=0.945**) and harvest (r=0.867*), root length at 60 DAS (r=0.960**) and harvest (r=0.935**). Grain yield showed positive correlation with yield attributes and nutrient content viz, effective tillers/plant (r=0.758**), spike length (r=0.937**), grains/spike (r=0.991**), spike weight (r=0.954water use efficiency (r=0.785**), N content (r=0.884**), P content (r=0.918**) and K content in grain (r=0.873*).