The imbalance between the national demand and the offer of rice encouraged the emergence of the pluvial rice-growing in order to make up for the deficit. To understand this state, a diagnosis on manures and the pesticides have been led through the survey of the segment merchandising and use of the aforesaid products destined to the rice-growing in the city of Garoua. The gotten results put in evidence the merchandising of only one type of manure common to the corn destined to the production of rice and a diversity of the pesticides with common active matters. In a general manner, the pesticides are used in the respect of the recommendations of the manufacturers. However, the doses of manure used don't respect those recommended by research. The atomization of the rice-growing exploitations on surfaces of less than one hectare and the failure to respect of the doses of manure recommended by research due to their elevated cost constitutes the main limits to the development of the rice production in the city of Garoua.