Response of dwarf wheat (Triticum aestivutm L.) to graded doses of P and K on soils of different available P status

Abstract

SummaryResponse of wheat to fertilizer-P on soils low and medium in available P increased with increasing doses up to 26 kg P/ha; responses were proportionately greater on medium-P soils. Application of 39 kg P/ha increased the response slightly on low-P but decreased it drastically on medium-P soils. The relatively small response on low-P soils may be due to fixation of fertilizer-P. The results indicate that the maximum response to fertilizer-P may be obtained only when P fixing capacity of the soil is satisfied so that sufficient P for the crop remains in the soil solution. The results of this investigation suggest that fertilizer should be applied on the basis of soil test data of individual fields instead of following regional recommendations.

Transfer Hydrogenation of Ketones and Catalytic Oxidation of Alcohols with Half-Sandwich Complexes of Ruthenium(II) Designed Using Benzene and Tridentate (S, N, E) Type Ligands (E = S, Se, Te)

“…The half-sandwich Ru(II) complexes containing chalcogenated pyrrolidine, morpholine, and benzotriazole known to catalyze the oxidation of alcohols efficiently 49,50,94 (TON up to 9.8 Â 10 4 ) are comparable with the present complexes (TON up to 9.9 Â 10 4 ). Transfer hydrogenation reaction in which hydrogen is transferred from one organic molecule to another is of great importance in organic synthesis since one can avoid the use of molecular hydrogen.…”

“…The Ru-C bond lengths (2.146(15)-2.233(7) Å ) and C-Ru-C bond angles of cations of 1 and 3-6 are in the normal range. [47][48][49]52,56,[58][59][60][66][67][68][69][70] The solvent molecules CH 3 CN and MeOH respectively in the crystal structures of 3 and 4 were found distorted. In the case of 4, using the SQUEEZE algorithm, the solvent molecule (MeOH) is removed.…”

Impact of evidence-based flipped or active-engagement non-flipped courses on student performance in introductory physics

“…In addition, in the last decade, the JiTT pedagogy has been extended a step further with the maturing of technology [47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] and "flipped" classes with no in-class lectures have become common with instructors asking students to engage with short lecture videos and concept questions associated with each video outside of the class and using the entire class time for active engagement. The effectiveness of flipped classes in enhancing student learning can depend on many factors including the degree to which evidence-based pedagogies that build on students' prior knowledge and actively engage them in the learning process are used, whether there is sufficient buy-in from students and the incentives that are used to get students engaged with the learning tools both inside and, equally importantly, outside the classroom.…”

Use of nano-silica in cement based materials—A review

“…Nano-silica decreased the setting time of mortar when compared with silica fume (SF) (Qing et al, 2007) and reduced bleeding water and segregation, while improved the cohesiveness of the mixtures in the fresh state (Collepardi, Olagot, Skarp, & Troli, 2002). Nano-silica-added cement paste showed reduction in setting time (Lin, Lin, Chang, Luo, & Cai, 2008;Singh, Agarwal, Bhattacharyya, Sharma, & Ahalawat, 2011;Singh, Bhattacharyya, & Singh, 2012), shortened duration of dormant and induction period of hydration, shortening of time to reach peak heat of hydration and increased production of calcium hydroxide at early ages (Ltifi, Guefrech, Mounanga, & Khelidj, 2011;Senff et al, 2009). When combined with ultrafine fly ash, better performance is assured than that achieved by use of SF (Lea, 1998;.…”