Longitudinal distribution of granulated fertilizer in different tiltings and position of the thread position of a double helicoidal doser

Abstract

The distribution of fertilizer by helical screw feeders is an essential factor for the establishment and yield of the crops. The objective of this work was to measure the efficiency of a new fertilizer of double thread fertilizer. The experiment was carried out on test bench with a treadmill (5.4 km h-1), using a completely randomized design, using a test bench equipped with a treadmill. A fixed dose of 220kg ha-1 was used, and 3 threads (22mm, 17mm, and 34mm) were tested at 54 rpm. Each test was performed every 0.09 m in a total of 5.4 m, being simulated 3 longitudinal slopes: 0 °; -11 ° and + 11 °, and 4 thread coupling positions in the machine, position A - the two threads in the same position, B - the right thread facing up, C - totally opposite threads and D - , with 3 replicates. The coefficient of variation (CV) fertilizer distribution in relation to the working slope and the position of the threads and amplitude of distribution were as parameters. There was no significant difference between the slopes tested, in level the mean CV was 36.29%, in -11 ° was 37.11% and + 11 ° was 36.57%. Differences occurred in the different work positions and type of threads, with CV at position A of 38.65%, B 37.18%, C 35.63% and D 35.18%. The dosage shows a relatively high variation of the distribution, but in contrast, this variation does not vary significantly in the factors studied.