Yahya Abd Almunim Abd Sabri; Alwand Tahir Rashid Dizayee
Volume 23, Issue 4 , December 2023, , Pages 208-221
Abstract
This experiment was conducted during the spring growing season of 2020 conducted in the field at the Grdarasha farm field of Agricultural Engineering College, Salahaddin University in Erbil, located in the south of Erbil city, Latitude: 36.11284 N, Longitude: 44.01247 E. The soil texture class was silty ...
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This experiment was conducted during the spring growing season of 2020 conducted in the field at the Grdarasha farm field of Agricultural Engineering College, Salahaddin University in Erbil, located in the south of Erbil city, Latitude: 36.11284 N, Longitude: 44.01247 E. The soil texture class was silty clay loam, the type of soil vertisols, to study the effect of four levels of phosphorus TSP (0, 20, 40, 60) Kg P. ha-1,Three levels of K (0, 15, 30) Kg K. ha-1, and Three levels of N (0, 15, 30) Kg N. ha-1. There combination of yield components and nutrient balance of chickpea plants by using DRIS methodology, by using; split split block design with three factors (N, P, and K) 36 treatment with 3 replicates was used. The main results could be summarized as The combination between Nain plot potassium, Sub main plot nitrogen, and Sub sub main plot phosphorus levels affected the yield of the chickpea plant significant also the maximum yield was recorded in treatment combination (K2N1P2) was (1.55Mg ha-1). Whereas the lowest mean value (0.73Mg ha-1) was recorded from the treatment combination (K0N0P0). The combined effect of nitrogen, phosphorus and potassium fertilizer on nutrient balance indices (NBI) and yield in chickpea plants. The lowest nutrient balance index was recorded from the treatment combination (K2N1P2).
Nameer Hamed Yassin Al-Tarbouli
Volume 22, Issue 3 , September 2022, , Pages 137-147
Abstract
Three soils of different content of gypsum and lime were selected, the first soil (G1) and the second soil (G3), were obtained near the fields of the Faculty of Agriculture, Tikrit University. As for the third soil (G5), was taken from the AL- alam Village side east of Tikrit city to a depth of (0-10)cm. ...
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Three soils of different content of gypsum and lime were selected, the first soil (G1) and the second soil (G3), were obtained near the fields of the Faculty of Agriculture, Tikrit University. As for the third soil (G5), was taken from the AL- alam Village side east of Tikrit city to a depth of (0-10)cm. the proportions of gypsum were 5%, 15%, 25%, and the proportions of lime were 25%, 20%, and 10% for soils G1, G3, and G5, respectively. Ferrous sulfate was added as a source of iron ions added to the three soils in the following proportions (0,10,25,50,100,150,250,500,750) mg.L-1 The concepts of isotherm were tested by using the physicochemical Freundlich and Langmuir adsorption equations. The results of the study showed the success of both equations in describing of iron ion adsorption process for all three soils, because They achieve a high (R2) but Langmuir's equation showed a greater superiority due to its decreasing (SE). As it appears from the results of the study, the superiority of treatment (G1) over treatments (G3) and (G5) in the maximum adsorption values, binding energy, (PBCFe)(KG) and (Kd) for adsorption and release. As for the values of Labale iron, the lowest value was in treatment (G1)then it began to increase until it reached its value in treatment (G5). The (Δf) values for the three soils were positive, and that the highest value was in soil (G1), and starts declining to reach its value for soil (G5).
Omar Zbar; Muthana Alrfaae
Volume 19, Issue 2 , June 2019, , Pages 106-115
Abstract
Six regions in Anbar governorate were selected to study spatial variation of iron and manganese forms using time series analysis under different environments. Al-Baghdadi, Heet, Abu Teban, Ramadi, Khalidiya and Falluja were selected. two pedons was selected under two environments: desert and alluvial ...
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Six regions in Anbar governorate were selected to study spatial variation of iron and manganese forms using time series analysis under different environments. Al-Baghdadi, Heet, Abu Teban, Ramadi, Khalidiya and Falluja were selected. two pedons was selected under two environments: desert and alluvial soil, toward vertical in to Euphrates River. Total, available, Crystalline free and Amorphous free, for each iron and manganese was measurement as well as Crystalline form for two elements. statistical analysis by using time series was calculated. The results of the research showed the following: Differentiation of models that describe forms of iron and manganese according for different sedimentation environment as well as heterogeneity of spatial reliability and sampling methods. The method of Semi Variance showed its preference in obtaining the samples and describing the variation of iron and manganese forms compared
