In investigating the effect of adding different sources of organic waste fertilizers on soil structure, the selection of two locations in Wasit Province, Iraq, with different soils succeeded. The first location had sandy loam, and the second had clay. The soil distribution in plastic pots ensued, with three sources of organic waste added (cow, sheep, and poultry). The application of five amounts of each source included 0, 5, 10, 15, and 20 t/ha with three replicates. The study confirmed the characteristics of the weighted rate and the stability of the soil groups. After completing the experiment, the study found that sheep waste was the most effective source in the stability of the soil groups. It has recorded 05.28% when treating the control at 0 t/ha, while it became 54.48% at the level of 20 t/ha. Moreover, the weight was 37.0 mm in the control treatment; it became 95.0 mm at the level of 20 t/ha. The lower effect was the waste from cows, while the waste of poultry had fewer effects in both trials.
Organic waste, fertilizers, soil structure, cows, sheep, and poultry wastes
Given the heterotic effects, the hybrids had better mean performance for the evaluated traits than their parental lines and testers. The parental genotypes, IR58025A, BRRI1A lines, and the BUdhan2R tester emerged as appropriate for hybridization. IR58025A × BUdhan2R and BRRI1A × BUdhan2R were also the best crosses due to higher grain yield, heterosis, and combining abilities. These parents and hybrid combinations could proceed to be deployed in an aromatic rice hybridization program.