ملخص البحث :

A field experiment was carried out in Al-Hussainiya area / Al-Mussaib district within Babil Governorate to study the extraction and estimation of potassium in cultivated soil, and bush soil, and uncultivated soil, to identify the state of the soil in terms of its ability to supply potassium (poor potassium - moderate potassium - rich in potassium). Soil samples were collected from the study area in the period (1-4-2022) for each soil from the surface depth (0-30) cm and sub-surface (30-60) cm. Potassium was extracted from the study soil and the amount of potassium Soluble in water, and the exchangable, reserve-K, primary step-K and total step-K, and total K. The value of reserve-K was 0.40 and 0.46 cmol in the cultivated soil, 0.99 and 1.07 cmol in the uncultivated soil, 0.66 and 0.87 cmol in the bush soil and the surface and subsurface layers, respectively, and the initial step-K values were 0.213 and 0.487 cmol in the cultivated soil and 0.845 and 0.929 cmol in uncultivated soil and 0.48 and 0.511 bush soil, and value of total step-K was 0.982 and 0.944 cmol in the cultivated soil, 3.073 and 3.136 cmol in the uncultivated soil, 2.795 and 2.109 cmol in the bush soil and the surface and subsurface layers, respectively. Based on the results obtained and under the conditions of this study, the concentration of potassium Soluble in water and exchangable within the content of the dry and semi-arid areas, and that the exploitation of the soil by intensive cultivation constantly led to a decrease in the values of step-K and reserve-K, and that the concentration of step-K and reserve-K is lower in the subsurface layers (30- 60) cm in the cultivated soil and the soil in which the bush grows. As for the uncultivated soils, the potassium values are higher and almost close in the subsurface layer compared to the surface. As a result of the conditions of use, the sequence of the step-K and reserve-K in the study soils are as follows: Cultivated soil > bush soil > uncultivated soil. In addition to the need to use potassium fertilizers under conditions of intensive cultivation.

ملخص البحث :

A field experiment was coundected in the field of the Department of Field Crops, College of Agriculture, Universityof Baghdad during the winter season 2017-2018 to study the effect of spraying with zinc on some yield traits of two cultivarsof broad bean (Spanish Loz de otono and Dutch Dolce star). Arrange the split-split Plot Design according to the R C B D withthree replicates. The traits (Spanish Loz de otono and Dutch Dolce star) occupied the main plot and were denoted by thesymbols (C1, C2), while the number of spraying (the first before flowering, the second at 25% flowering and the third afterflowering 50%) occupied the sub plot and symbolized by the following symbols (M1, M2, M3), while the concentrations ofzinc element spray occupied the sub-plot (20,10,0) mg. L-1 and symbolized by the symbols (Z0, Z1, A field experiment wascoundected in the field of the Department of Field Crops - College of Agriculture - University of Baghdad during the winterseason 2017-2018. To study the effect of spraying with zinc on some yield traits of two cultivars of broad bean (Spanish Lozde otono and Dutch Dolce star). Arrange the split-split Plot Design according to the R C B D with three replicates.Thetraits(Spanish Loz de otono and Dutch Dolce star) occupied the main plot and were denoted by the symbol (C1, C2), Whilethe number of spraying (the first before flowering, the second at 25% flowering and the third after flowering 50%) occupiedthe sub plot and symbolized by the following symbols (M1, M2, M3),While the concentrations of zinc element sprayoccupied the sub-plot (20,10,0) mg. L-1 and symbolized by the symbols (Z0, Z1, Z2). The results showed a significant effectof the Spanish cultivar (C1) by giving it the highest mean in the number of seeds. Pod-1, weight of 100 gm seeds, and the seedyield of the plant was (5.02 seeds. Plant- 1, 69.60 g and 53.22 g. plant -1) while the Dutch cultivar (C2) gave the highest averagein the number of pods per plant and the percentage of nitrogen in the leaves as it reached (22.23 pods. Plant-1 and 2.09 N%).The spraying dates showed a significantly excelled, where the second date (M2) was superior to the number of pods perplant, the number of seeds. plant-1, weight of 100 seeds, and the plant’s seed yield amounted to (24.35 pods. plant-1, 5.28seeds.pod-1 and 63.98 g). The results showed a significant effect of spraying concentrations, where the highest concentration(Z2) in the following traits was the number of pods per plant, the number of seeds. Pod-1. The weight of 100 seeds and theplant’s seed yield amounted to (24.34 pods. Plant-1, 5.09 seeds. Pod-1, 70.98 g and 52.67 g. Plant-1).