Experiment conducted with nine rice varieties during Pishanum season of 1989–90 revealed that Co 37 performed better in ratoon crop and recorded 3.2 t/ha grain yield. It was evident that the ratooning ability was influenced by stem thickness of stubble, carbohydrate content and leaf senescence of main crop. The study also suggests that by maintaining higher seed size and productive tiller in ratoon crop, there is ample possibilities to increase grain yield.
A high yielding Prosomillet culture, TNAU 151, was developed at the Department of Millets, Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore and tested at national level for three years from 2005 to 2008. It is a non-lodging, fertilizer responsive and early maturing culture selected from the segregants of the cross involving TNAU 96 X PV 1673. Its average yield is 1860 kg of grain and 4130 kg of straw per hectare under normal condition. It is a medium tall, profusely tillering, non shattering and non-lodging variety and is highly suitable for dry lands of India. The panicle is large and branched. The grains are bold and golden yellow in colour. Being a short duration culture (72 days), it is the best suited crop for contingency planting. Under All India Coordinated Trials, this culture has registered an average yield of 1860 kg/ha which was 10.36 and 14.44 percent increase over TNAU 149 and DHPM 50-1-1 (qualifying checks) and 35.35 and 35.45 percent increase over national checks GPUP 21 and K 1 respectively. Based on the consistent superiority in yield performance, the prosomillet advanced culture TNAU 151 was released as a national variety in the year 2008.
A high yielding and early maturing prosomillet culture TNPm 230 was developed at the Centre of excellence, Athiyandal, Tamil Nadu Agricultural University and released TNPm 230 as ATL1at national level. It is a derivative of the cross involving TNAU 164 x IPM 19. It yields on average grain yield of 2152 kg/ha and straw yield of 5970 kg/haunder rainfed condition. This variety has registered 12 and 15 per cent increased grain yield over the checks TNAU145 and GPUP 21 respectively in All India Coordinated trials. Proposed variety has given Eight and 11 per cent increased grain yield over the qualifying varieties TNPm 228 and DHPrMV 2721 respectively. TNPm 230has semi-compact panicle, bold seeds and exhibited better grain quality than the checks; on par for a response to agronomic practices, susceptible to banded blight in AP only. Therefore, the entry TNPm 230 as ATL1 is recommended for the national level release except in Andhra Pradesh.
KeywordsProso millet new early maturing variety https://doi.
Field experiment was conducted at the Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore during kharif 2010 to study the influence of iron nutrition and arbuscular mycorrhiza (AM) inoculation on yield attributes, yield and economics of hybrid maize in calcareous soil. The experiment was laid out in factorial randomized block design with three replications. The treatments included were arbuscular mycorrhiza (M + ) and control (M - ) under factor ‘A’ and soil application of 25 kg and 50 kg FeSO 4 ha -1 , Foliar spray of FeSO 4 ,0.5% and combination of soil application and foliar spray and Control, under factor ‘B’. The results revealed that among the iron treatments, 50 kg FeSO4 + 0.5% FeSO 4 foliar spray recorded better yield attributes and higher grain yield. It was comparable with 25 kg FeSO 4 + 0.5% FeSO 4 foliar spray which was economically profitable. Regarding the mycorrhizal treatments, AM inoculated plants recorded better yield attributes and grain yield. Among the treatment combinations, 25 kg FeSO 4 + 0.5% FeSO 4 foliar spray along with AM recorded better yield attributes and higher grain yield, net return and B: C ratio (2.16)
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