NITROGEN AND ORGANIC MATTER MANAGEMENT, TILLAGE SYSTEMS AND THEIR EFFECT ON SOME CHARACTERISTICS OF YELLOW CORN GROWN IN TWO GYPSUM SOILS
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Abstract
Two field experiments were conducted during the fall season of 2023 in the fields of the College of Agriculture, Tikrit University, on two soils differing in their gypsum content. The first site experiment, G1, with a gypsum content of 5%, included the following factors:
- Factor 1: Strip tillage depth (8 cm, 15 cm, 30 cm), represented as (T1, T2, T3), respectively.
- Factor 2: Type of organic material (vermicompost, plant compost), represented as (O1, O2), respectively.
- Factor 3: Nitrogen levels (160, 240, 320 kg N ha⁻¹), represented as (N1, N2, N3), respectively.
The second site experiment, G2, with a gypsum content of 15%, included the following factors:
- Factor 1: Tillage type (no-tillage, strip tillage at 8 cm depth, reduced tillage), represented as (T0, T1, T2), respectively.
- Factor 2: Type of organic material (vermicompost, plant compost), represented as (O1, O2), respectively.
- Factor 3: Nitrogen levels (160, 240, 320 kg N ha⁻¹), represented as (N1, N2, N3), respectively.
The study results revealed the following:
The T2O1N3 treatment in the first site showed significant superiority in terms of absolute growth rate and yield. Comparing the results of the two experiments, it was noted that the experiment with 5% gypsum content demonstrated significant superiority over the experiment with 15% gypsum content for all measured traits.
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Copyright (c) 2025 Sarab J. Mohammed, Nooraldeen M. Mahaoush, Mohammed J. Farhan (Author)
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