Field experiments were conducted between April and November 2016 at the Teaching and Research Farm of Ibrahim Badamasi Babangida University, Lapai (Latitude 09 0 02 " N and Longitude 06 0 34 " E) and Research Farm of College of Agriculture, Mokwa (Latitude 09 08''N and Longitude 05 0 04''E) to examine the effects of poultry manure time of application on the growth and yield of water melon varieties. The experiment was a 4 x 3 factorial laid in a Randomized Complete Block Design (RCBD) replicated three times. The treatments consisted of four (4) varieties of water melon and three (3) different times of application of poultry manure; a week before planting, during planting and a week after planting. The poultry manure was applied to all the treatments at the rate of 10 tonnes per hectare. Parameters evaluated were vine length per plant (cm), number of leaves per plant, number of branches per plant, days to first flowering, days to 50% flowering, number of fruits per plant, weight of fruits per plant (kg) and fruit yield (t/ha). Data collected were subjected to analysis of variance (ANOVA), significant means were separated using Least Significant Difference (LSD 0.05 ). The results indicated that, out of the four varieties evaluated, variety Koloss F 1 , and Kaolak significantly produced longest vine, higher number of leaves and branches, higher number of fruits per plant, heavier fruits weight per plant and higher yield (t/ha). Also the application of poultry manure at a week before planting significantly supported higher growth rate and yield in all the four water melon varieties evaluated. Based on the outcome of this research, Koloss F 1 and Kaolak varieties planted in the plots with the application of poultry manure a week before planting showed appreciable growth responses at the two locations considered.
Field experiments were conducted in 2010 and 2011 to evaluate maize with the objective of determining genetic variation and relationship among yield and yield component traits for simultaneous selection in dry and green maize. Phenotypic variance was mainly accounted for by the genetic component. Heritability was high for flowering, height and ear traits and grain yield. All the traits were positively correlated with grain yield, with the ear traits of kernel rows/cob and kernels/row on cob contributing most to grain yield. The high heritability coupled with the highest genetic advance observed for kernels per row on cob, kernel rows/cob and grain yield at 20% selection intensity indicates that concentrating on these three traits in selection programme will achieve a fast progress in selection. Thus grain yield could be simultaneously selected with kernels per row on cob and kernel rows/cob for improvement in dry and green maize production.
________________________________________________________________________________________ AbstractAgronomic parameters and Genotype × environmental interaction for stability estimate were investigated on grain yield of 2 hybrid rice lines (TEJ Gold and 6444 Gold) with three commercially released rice varieties (FARO 44, FARO 52 and FARO 57) as checks. This was done in six locations in 2017 of which five out of the six (Kebbi, Kano, Enugu, Warri and Lafiagi)were in dry season and one (Wushishi) in wet season. The experiments were laid out in a randomized complete block design in three replications having 20 cm inter and intra row spacing. AMMI ANOVA for grain yield revealed significant difference among the genotypes and environments that were tested (P<0.01) and their interaction. The observed difference on the interaction indicated that, the genotypes responded differently across the different environments. The partitioning of GGE through GGE biplot analysis showed that, PC1 and PC2 contributed 75.34% and 16.33% which summed up and explained a total of 91.67% of the observed variation seen, though PC1 contributed more of the observable variations. Cultivar ranking and genotype stability revealed that the hybrid TEJ GOLD, performed well across the test locations though not stable across the locations tested. However, FARO 52 and FARO 57 had a small GE effect, indicating their stability and being less influenced by the environment. The two hybrids rice (TEJ Gold and 6444 Gold) significantly gave a higher yield of 6683 and 6005 kg/ha respectively, with yield advantage ranging from 11.9 to 32.8% over the three check varieties.
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