Pradhan, R., Izaurralde, R. C., Nyborg, M. and Malhi, S. S. 1997. Yield and N uptake of barley on two artificially eroded soils in north-central Alberta. Can. J. Soil Sci. 77: 317-322. Topsoil depth is an indirect indicator of soil quality and crop productivity. A 2-yr field study was conducted in north-central Alberta with the following objectives: (1) to determine aboveground barley dry matter yield, N uptake, and fertilizer-use efficiency (FUE) in two artificially eroded soils of contrasting properties, and (2) to assess the effectiveness of KNO 3 and urea in compensating for lost productivity. Field experiments were conducted on an Orthic Gray Luvisol (Site 1) and on an Eluviated Black Chernozem (Site 2) in 1991 and 1992. The treatments consisted of three depths of topsoil removal (0, 10 and 20 cm) and three N fertilizers (KNO 3 and urea at 150 kg N ha -1 , and the control). The plots were sown to barley (Hordeum vulgare L.). Yields and N uptake of aboveground barley dry matter decreased with each increment of topsoil removal and were lowest in the 20-cm topsoil removal. Fertilizer N improved yields and N uptake at each depth of erosion. In most of the erosion treatments barley yields and N uptake tended to be greater with KNO 3 than with urea. The effectiveness of each N source, however, varied with site. At the 20-cm depth of erosion, KNO 3 was more effective than urea. The trend in fertilizer-use efficiency increased with depth of erosion at Site 1 but decreased at Site 2.

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Tomato grown during the main season (winter) causes a glut of produce in the market and its sale price is also very low. But the crop grown in rainy season has a better demand and is much remunerative for the farmer. Therefore, the present experiment was undertaken to develop and identify tomato hybrids well adapted to the rainy season. The experiment was conducted at the All India Co-ordinated Research Project on Vegetable Crops, Orissa University of Agriculture and Technology, Bhubaneswar. Forty five F 1 hybrids were developed by crossing 10 divergent parental lines in half diallel fashion during 2016-17 (winter). The 45 F 1 hybrids along with the 10 parents were evaluated in Randomised Block Design with three replications during the rainy season of 2017. Analysis of variance revealed significant differences among the hybrids for all the characters. The parent BT 317 proved to be the best with respect to characters like fruit yield per plant, average fruit weight, plant height, fruits per plant, fruit girth, fruit pericarp thickness, no. of clusters per plant and no. of locules per fruit. The hybrids BT 217 x BT 215-3-3-1 and TOBW-3 x BT 215-3-3-1 proved to be best with regard to fruit yield/plant (943.64 g and 651.24 g respectively), average fruit weight (37.00 g and 35.20 g in order), fruit length (5.96 cm and 6.10 cm), fruit girth (5.86 cm and 5.70cm), fruits per plant (27.18). BT 106 x BT317 was promising for earliness i.e. days to first flowering (64.00 days). The hybrid BT 305-2-4-2 x BT 215-3-3-1 was the best for fruit pericarp thickness (0.64 cm). In respect of plant height, the hybrid BT317x BT 429-1-1was found to be promising (110.40 cm). Fruit length of BT 215-3-3-1 was the maximum.