Ten people have been killed in two days of clashes between herders and farmers in southern Chad, a local governor said Thursday. Tensions between semi-nomadic Arab herders and sedentary African farmers is a traditional problem in central and southern Chad. They often arise when farmersaccuse herders of allowing their animals to eat or trample on their crops. The latest deadly clash began on Tuesday as an altercation between a farmer and a herder in Marabe, a small village some 700 kilometres (435 miles) south of the capital N’Djamena. The trouble spread to two neighbouring villages on Wednesda…