Influence of lime and farm yard manure
par Dieudonne MUGOBOKA
ISAE Busogo - Bachelor's Degree 2008
The experiment was conducted in ISAE farm in Busogo sector of MUSANZE District in Northern Province of Rwanda. ISAE is situated in volcanic region, on altitude of 2200m above sea level. The climatic conditions (Rainfall and temperature) during experimentation are shown in the table below:
Source: Meteorological station of ISAE (2008).
The test plant is Carrot (Nantes cultivar). It is a popular crop that is grown in the sector and the variety is characteristically 10-20 cm long and has cylindrical to conical tuber with fine to medium foliage (Grabben et al, 2004).
The farm yard manure used for soil amendment was obtained from ISAE farm. It is a mixture of animal solid wastes of different species reared at ISAE.
The lime used is a slacked lime Ca (OH)2 obtained by burning Calcium to obtain CaO; which is slacked using water to obtain the calcium hydroxide.
The design of experiment was Randomized Block Design (RBD).It is composed of seven treatments each at four replicates .The size of the treatment is 2.1m X 1.2m and the treatment includes:
T1=10t/ha of farm yard manure
T2=15t/ha of farm yard manure
T3=20t/ha of farm yard manure
T4=2t/ha of Lime
T5=2.5t/ha of Lime
T6=3t/ha of Lime
The layout of the plots on the field is shown below:
The cultural tillage practice was carried out one month before sowing so that the soil is rendered loose.
Thereafter the plots were demarcated and lime was immediately incorporated into the plots to be treated with lime according to the randomization of the experiment. Manure was added to the required plots two weeks before sowing.
Sowing was done by spreading seeds in the furrow at 30cm spacing between rows. Each plot comprises 7 rows of sown seeds and the sowing rate was 7.56g/plot. Immediately after sowing, the plots were mulched. The mulch material remained on the plots for one week and was thereafter removed immediately after seed germination.
Weeding was done twice during the growing season. The first weeding was done one month after sowing while the second was carried out 46 days after sowing.
The weeding was done simultaneously with earthing up of the soil and thinning that resulted to approximately 5 cm between the plants in a row.