Based on the context and the answer, generate a question. 

Context: The reality is that we live on the farm , we 're there everyday , you do n't want to be spraying with insecticides and pesticides . We 'll farm about three - quarters of the property without herbicides . We have got some topography issues where some of the vines are planted and we ca n't get away with not using herbicides right now . We ' ve tried mulching .

Answer:

They do n't use chemicals .



Why may the farmer be having some issues ?