Field experiments were conducted at Tamil Nadu Agricultural University. Coimbatore from 1994, covering two kharif and two summer seasons, to evaluate the influence of seasons on the yield of soybean. The yield increase in soybean during summer season was 8.7 per cent over kharif season. The agro-meteorological parameters computed indicated that Growing Degree Days (GDD) and Photothermal Unit (PTU) were comparatively higher for kharif seasons than summer season. However. Heliothermal. Unit (ITU) and Heat Unit Efficiency (HUE) were higher for summer (1995 and 1996) as compared to the Kharif.

Field experiments were conducted at the Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu during kharif and rabi seasons of 2000-2003 under rainfed condition. The treatments included raising greengram or cowpea for vegetable/grain purpose and utilization of haulms as fodder as well for incorporation alongwith fallow (no pulse crop). For the second season crop of finger millet, the above treatments were kept as main plot treatments with the subplot treatments of either transplanting or direct sowing of finger millet with and without phosphorus. Results of the study revealed that maximum green fodder production and yield were obtained in cowpea as compared to greengram. In succeeding finger millet crop, higher grain and straw yield and net return were obtained when cowpea was incorporated in the early season followed by transplanting of finger millet with P application.

Investigations carried out at the Agricultural Research Station. Aliyamagar, Tamil Nadu. India during 1993-94 and 1994-95 revealed that irrigation one day after disappearance of ponded, water is the optimum irrigation regime for rice. Water requirement of rice varied from 932 nun to 1138 mm based on the irrigation regime and variety. The management practices of maintaining a population of 33 hills m2 adopting equidistant method of planting four seedlings hill proved to be feasible and best for yield maximisation under conditions of labour shortage. Varieties CO 45 and ADT 38 performed better than IR 20 with regard to grain yield and economics.

A field experiment conducted at the Agricultural Research Station, Aliyarnagar during Kharif seasons of 1986, 1987 and 1988 revealed that redgram to be a suitable and remunerative intercrop in groundnut.Raising one row of redgram for every six rows of groundnut proved to be the most suitable arrangement of the component crops.

Field experiments were conducted at Tamil Nadu Agricultural University, Colmbatore during rainy seasons (July-November) of 1997 and 1998 on direct sown finger millet to study the integrated effect of inorganic fertilizers, organic manure and biofertilizers. The results revealed that application of recommended N (50% through FYM and 50% through urea) and 50% of recommended P and K (15 kg each ha'') along with seed inoculation of biofertilizer (Azospirillum and Aspergillus each @ 25 g per kg of seed) recorded higher values of yield attributes and yield. Integrated nutrient management for ragi increased the benefit: cost ratio over the farmers practice (application of complex fertilizer) by 74% and 37% in 1997 and 1998, respectively.