Farmers in all countries, whether these are less economically developed countries (LEDCs) or richer countries, must make all sorts of decisions that affect the output of their farms (and we should note that there are countries where farming is largely done by women).
One decision that must be made is what to plant. This can be harder for farmers in LEDCs to decide. They may not have as much information as farmers in more developed countries. They may not know, on a scientific basis, what sorts of crop rotations are best. They may not have much information about the likely prices of any crops that they might want to raise for commercial purposes. Nevertheless, they must make this choice, potentially affected both the yields they get and the prices for which they can sell their produce.
Another decision is when to plant. This can be a dangerous thing because of the need to guess when rains will come. If the farmer plants at the wrong time, their crops can be damaged by lack of rain or by excess rain. Either way, it is a gamble that can have a major impact on yields.
Of course, farming is an uncertain thing everywhere in the world. These dilemmas are not unique to farmers in LEDCs.