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Abstract The present study and field measurements were carried out at Agricultural Engineering Station, Met Khalaf, Menoufia Governorate, Egypt, and Biosystem and agricultural Engineering Department, Faculty of Agriculture, Menoufia University in November 2016. The great aim of the experiment was to study and evaluate a combined planter for seeding and fertilization. The granulated fertilizer (Potassium nitrate and Urea) were used in the experiment to assess the performance of cultivation and fertilization of the machine. The effect of two factors (front speed, reduction rate and height from the soil) on the fertilizers amount in kilograms per feddan was studied. The effect of fertilizer tube height on fertilizer spread in the cultivation line was also studied. The results of the study were compared statistically to obtain the most suitable treatments to the addition of activating doses of fertilizers during planting and growing crop service. The results obtained were summarized as the following: At gat dimensions (15cm2) - There were highly significant differences between forward speed and for gat (15cm2). the mean values for fertilizer amount for different forward speeds ranged from (21.62±0.009 kg) for 8.5 km/h to (21.85±0.009 kg) for 2.5 km/h forward speed. - The fertilizer amount was 21.85 kg / feddan at the forward speed of 2.7 km / h and the fertilizer amount was reduced to 21.76 kg / feddan for both the forward speed of 3.7 km / h and 5 km /h at slow and fast speed of tractor, respectively, this means that at higher speed had availability operating time per feddan, while the same amount of fertilizer is given, and then reduced the fertilizer amount to 21.62 kg / feddan at the forward speed 8.5 km / h. - The mean values for fertilizer amount for different reduction ratios ranged from (10.80±0.020 kg) for (1:1.7) reduction ratio to (33.42±0.020 kg) for (1:4.8) reduction ratio. - Forward speed and reduction ratio interactions for fertilizer amount show highly significant differences - Mean values for fertilizer amount ranged from (10.56±0.039 kg) at reduction ratio (1:1.7) and forward speed (5km/h) to (33.60±0.039 kg) at reduction ratio (1:4.8) and forward speeds (2.5km/h and 5km/h). - The fertilizing rate increased by decreasing the reduction ratio for 1:2.4 to 1:4.8. The mean values for fertilizing rate for different reduction ratios increased from (14.40±0.039 kg/feddan) for (1: 2.4) reduction ratio to (33.60±0.039 kg/feddan) for (1:4.8) reduction ratio at the first gear teeth (16), where, the percentage of increase in the fertilizer amount was 57.1%, this percentage was approximately fixed at forward speeds 2.5, 3.7, 5 and 8.5 km/h. - The fertilizing rate increased by decreasing the reduction ratio for 1:1.7 to 1:4.1. The mean values for fertilizing rate for different reduction ratios increased from (10.80±0.039 kg/feddan) for (1:1.7) reduction ratio to (28.68±0.039 kg/feddan) for (1:4.1) reduction ratio at the first gear teeth (26), where, the percentage of the increase in the fertilizer amount was 62.3%, this percentage was approximately the same at forward speeds 2.5, 3.7, 5 and 8.5 km/h at the same reduction ratio. - There no effect for both the forward speed 3.7 at slow forward speed and 5 km/h at fast forward speed on the fertilizer amount, this means that a higher forward speed is better at saving work time per feddan, while it give the same amount of fertilizer, where the field performance rate was 1.94 feddan/h at forward speed 3.7 km/h and 2.63feddan/h at forward speed 5 km/h with increasing about 26.2%. So that, speed was preferable to 5 km/h because it covered a larger area in less time. While, forward speed of 8.5 km/h was not recommended although it is fast and less in time, and up normal fertilizer distribution. At gat dimensions (22.5cm2) - There were highly significant differences between reduction ratio at - Mean values for fertilizer amount for different forward speeds ranged from (65.95±0.189kg) for 8.5 km/h to (66.51±0.189 kg) for 2.5 km/h forward speed. - The mean values for fertilizer amount ranged from (48.96±0.803 kg) at reduction ratio (1:1.7) and forward speed (5 km/h) to (87.33±0.803 kg) at reduction ratio (1:4.8) and forward speeds (2.5 km/h). - The fertilizing rate increased by decreasing the reduction ratio for 1:2.4 to 1:4.8. The mean values for fertilizing rate for different reduction ratios ranged from (60.00±0.803 kg/feddan) for (1: 2.4) reduction ratio to (87.33±0.803 kg/feddan) for (1:4.8) reduction ratio at the first gear teeth (16). The percentage of increase in the fertilizer amount was 31.3%, this percentage was approximately the same at forward speeds 2.5, 3.7, 5 and 8.5 km/h. - The fertilizing rate increased by decreasing the reduction ratio for 1:1.7 to 1:4.1. The mean values for fertilizing rate for different reduction ratios ranged from (49.20±0.803 kg/feddan) for (1:1.7) reduction ratio to (69.24±0.803 kg/feddan) for (1:4.1) reduction ratio at the second gear teeth (26), where, the percentage of increase in the fertilizer amount was 28.9% this percentage was slightly changed at forward speeds 2.5, 3.7, 5 and 8.5 km/h. The slightly differences in fertilizer amounts among four forward speeds for the same reduction ratio may be due to the field vibrations by the equipment during operation on the field soil. - There where slightly effect of the fertilizer amount at both the forward speed 3.7 at slow forward speed and 5 km/h at fast forward speed . This means that a higher forward speed is better at saving work time per feddan, because the field performance at forward speed 3.7km/h was 1.94 feddan/h while it was 2.63 feddan/h at forward speed 5 km/h with increasing about 26.2%. So that, speed was preferable to 5 km/h because it covered a larger area in less time. Influence of forward speed and reduction ratio on drilling time - The mean values for drilling time for different forward speeds ranged from (14 min) for forward speed (8.5 km/h) and reduction ratio to (49 for 2.5 km/h forward speed. Influence of forward speed and reduction ratio on fuel consumption - The mean values for fuel consumption for different forward speeds ranged from (1.25 Lit/feddan) for forward speed (8.5 km/h) to (4.40 Lit/feddan) for 2.5 km/h forward speed at all reduction ratios. Influence of forward speed during drilling at different pipe levels on fertilizer scattering - The mean values for fertilizer scattering (cm) for different forward speeds ranged from (6.5cm) for forward speed (2.5 km/h) and fertilize pipe level (5cm) to (25cm) for 8.5 km/h forward speed and (15 cm) fertilize pipe level. This was due to the granular fertilizer were affected by the kinetic energy gained by the speed of the machine, and potential energy gained by the pipe level. Influence of reduction ratio on distance between seeds - The mean values for distance fertilizer placed (cm) for different reduction ratios ranged from (10 cm) for reduction ratio (1:4.8) to (29 cm) for reduction ratio (1:1.7). Finally, from the present results, it is clear that to improve seed cultivation by using seed cum fertilizer show: 1- When planting alfalfa, the machine can be used at a forward speed (5km/h) and a reduction ratio (1:2) to give the recommended amount of fertilizer to the alfalfa crop, which is 12kg/feddan (potassium nitrate) at gat dimensions (15cm2) 2- After planting alfalfa, the machine can be used at a forward speed (3.7km/h) and a reduction ratio (1:4.8) to give the recommended amount of fertilizer to the alfalfa crop, which is 30kg/feddan (potassium nitrate) at gat dimensions (15cm2) 3- When planting maize, the machine can be used at a forward speed (5km/h) and a reduction ratio (1:2) to give the recommended amount of fertilizer to the maize crop, which is 50kg/feddan (urea) at gat dimensions (22.5cm2) 4- After planting maize, the machine can be used at a forward speed (5km/h) and a reduction ratio (1:3.9) to give the recommended 69 amount of fertilizer to the maize crop, which is 75kg/feddan (urea) at gat dimensions (22.5cm2) 5- when planting wheat, the machine can be used at a forward speed (3.7km/h) and a reduction ratio (1:4.8) to give the recommended amount of fertilizer to the wheat crop, which is 33kg/feddan (urea) at gat dimensions (15cm2) |