**2.2 Experimental design**

*Recent Advances in Numerical Simulations*

**Parameters Soil layers, cm**

Clay % 11.1 19.4 34.9 Silt % 39.4 35.9 23.8 Sand % 50.5 44.7 42.3 Textural class Sandy loam sandy clay loam sandy clay Bulk density, g/cm3 1.55 1.43 1.35 FC, (vol. %) 21.34 27.61 28.22 PWP, (vol. %) 7.18 9.87 11.18

pH 7.54 7.54 7.54 EC (ds/m) 1.53 1.53 1.50 Organic carbon (%) 1.82 1.79 1.71 Organic matter, g/100 g soil 1.19 0.67 0.63 Total nitrogen, g/100 g soil 0.059 0.060 0.054 Available P (mg/kg) 54.2 54.2 48

**0–40 40–65 65–120**

**Physical properties of soil**

**Chemical properties of soil**

*Physical and chemical properties of soil at initial condition.*

**Parameter Unit Well Water Wastewater Standard value** PH — 7.9 7.9 6–8.5 EC dS/m 0.58 1.1 — Na+ mg/l 63.7 85.8 — K+ mg/l 2.3 24.6 — Ca2+ mg/l 24 36.5 — Mg2+ mg/l 15 18.2 100

P mg/l 0.18 2.8 — Cl mg/l 12.4 118 600 SAR mg/l 2.45 2.87 — B mg/l 0.86 0.9 1

Total N of Coliform — — 1000 — BOD5 mg/l 115 100 COD mg/l 145 200

NH3-N mg/l — 32 NO3-N mg/l — 0 Org – N mg/l — 14

Alkanity — — 670 Hardness — — 189

*Physico-chemical characteristics of water and treated wastewater.*

**134**

**Table 2.**

**Table 1.**

Plots were irrigated with either well water or wastewater in a random complete block design (RCBD), with four replications according to the following treatments:

T1 - Irrigation by treated wastewater during all growing season, (%100 wastewater).

T2 - Alternate irrigation by treated wastewater and well water.


To obtain these ratios were used in the operation of the irrigation turn. (**Table 3**).

The experiments were carried out on 20 plots, and each experiment included five irrigated furrows 4 m in width and 4.2 m in length (along the crop rows). Each plot consisted of 5 crop rows with a plant row spacing of 75 cm. The plots (T3) were grazing prior sowing with 3000 kg ha−1 or (3 kg m−2) animal manure. The chemical analysis of animal manure has been showed in **Table 4**.

The plots (T4) were fertilized based on soil sample tests with 300 kg ha−1 or (30 gr m−2)of triple super phosphate, broadcast at seedbed preparation, and 110 kg ha−1 of net nitrogen or (200 kg ha−1) of urea at tillage time (at two equal section) and 6 weeks after panting. In this study, the total manure was applied prior sowing and


#### **Table 3.**

*The proportions of water and wastewater.*


#### **Table 4.**

*Chemical analyses of animal manure.*

for chemical fertilizer, 50% N and total P fertilizers were applied to the sowing seeds. Tomato was seeded on first week of May of each year in the plots at a plant spacing of 75 cm; Weed, diseases and insect control were uniformly managed during the growing season. After planting, irrigation was applied as required with well water until green stage and then treatments and irrigation applied as required during the growing season.
