Many weed management techniques exist everywhere on farms. However, the frequently used mechanical weeding reduces their nuisance. The combination of weeding and hoeing has multiple advantages on crop development. The objective of this research is to evaluate the effects of hoeing on the yield and profitability of eggplant cultivation in the off-season. Four hoeing frequencies (F0, F1, F2 and F3) have been tested. After transplantation into a Randomized Complete Block, the frequencies were implemented with a localized watering system. At harvest, biometric parameters, fruit marketing, profitability and their components were evaluated and subjected to statistical calculations. The main results showed from an agronomic point of view that the watering frequencies did not influence the length of the fruits and the number of fruits per plant. Thus, the F3 frequency gave the best yield with 20.36 t/ha on the two harvests. However, the baton turned out to be better from an economic point of view with a profitability of 326.75%. Controlling weeds on eggplant crops in the off-season by hoeing gradually reduces its profitability. Its cultivation without hoeing during this period, with localized irrigation, can promote the conservation of soil moisture for good plant nutrition on a permanent basis and a reduction in the pressure of unwanted weeds.

The study examines the impact of glyphosate doses on the chemical characteristics of soils in four rural communes of the N’Zérékoré Prefecture in Guinea. The objective is to analyze the variations in pH, cation exchange capacity (CEC), and nutrient levels (K2O, P2O5, CaO, and Na2O) following the application of different glyphosate doses. A complete randomized block design was used, and soil samples were analyzed to determine the agronomic and environmental impacts of this herbicide. The results indicate that the application of high doses of glyphosate significantly affects the pH and CEC, leading to soil acidification and a reduction in its ability to retain nutrients. These observations highlight the importance of managing glyphosate doses to maintain soil health and the sustainability of agricultural practices.

The present study focused on determining the microbiological load of watering water and vegetables grown in the market gardening area of ​​SAGBAYA, Urban Commune of Faranah. The microbial germs contained in water and vegetables were determined by the membrane filtration method. The results of microbiological analyzes of vegetables indicated variations depending on the locations of the wells and their sources of pollution. During the two vegetable production seasons, the results showed that except for the water from the borehole, that of the most exposed wells was highly contaminated. The water used during the 2024 season, unlike the previous one, all contained total and fecal coliforms whose values ​​oscillated respectively between 15 and 159 CFU/100ml and 9 to 126 CFU/100ml. Of the vegetables harvested, although some samples were free, carrots contained more pathogens than cabbage and lettuce in both well and borehole water. The microbiological charges in CFU/100 ml of cabbage organs varied from 2 to 85 in total coliforms and from 2 to 56 in fecal coliforms; 3 to 75 in total coliforms and 1 to 56 in fecal coliforms in carrots, finally 3 to 85 in total coliforms and 1 to 66 in fecal coliforms in lettuce. Most water and vegetables have microbiological charges exceeding the required standards, hence the consumption of these vegetables without treatment constitutes health threats to consumers.