Cultivation dependent on rainfall falls into two categories. Most Sudanese farmers always have relied on rainfed farming. In addition to these traditional farmers, a large modern mechanized rainfed agriculture sector has developed since 1944-45, when a government project to cultivate the cracking clays of central Sudan started in the Al Qadarif area of Ash Sharqi Province, largely to meet the food needs of army units stationed in the British colonies in eastern Africa (present-day Kenya, Tanzania, and Uganda). An average of about 6,000 hectares a year was cultivated between 1945 and 1953, producing chiefly sorghum, under a sharecropping arrangement between the government and farmers who had been allocated land in the project. These estates proved costly, however, and in 1954 the government began encouraging the private sector to take up mechanized farming in the area, a policy that continued after Sudan gained independence in 1956. Under the new approach, the government established several state farms to demonstrate production methods and to conduct research. Research activities have been very limited, however, because of staffing and funding problems, and the farms have been operated essentially as regular production units.

The private sector response was positive, and by 1960 mechanized farming had spread into other areas of the cracking clay zone in Ash Sharqi and Al Awsat provinces. The government set aside rectangular areas that were divided into plots of 420 hectares (later raised in places to 630 hectares) each. Half of these plots were leased to private farmers, the other half left in fallow. After four years, the originally leased land was to be returned to fallow and the farmer was to receive a new lease to an adjacent fallow area. When the demand for land grew faster than it could be demarcated, areas outside the designated project limits were taken over by private individuals. The four-year lease proved unpopular because it meant new investment in clearing land every four years, and apparently much of the worked land continued to be cultivated while fallow land was also placed under cultivation. By 1968 more than 750,000 hectares were being cultivated, of which it was estimated that more than 200,000 hectares constituted unauthorized holdings. The average agricultural production growth rate declined, however, from 2.9 percent in the period between 1965 and 1980, to 0.8 percent in the period between 1980 and 1987, the latest available figures. Reportedly, for the 1991-92 season, the Ministry of Agriculture and Natural Resources planned for about 7.3 million hectares of food crops to be planted, with about 1.6 million hectares planted in the irrigated sector and about 5.7 million hectares in the rain-fed areas.

The investment requirements for mechanized farming favored prosperous cultivators, and eventually most farms came to be operated by entrepreneurs who raised capital through mortgageable property or other assets in the urban centers. Through arrangements with other individuals, these entrepreneurs frequently managed to control additional plots beyond the legaeb5 gal limit of two. Their ability to obtain capital also permitted them to abandon depleted land and to move into newly demarcated uncleared areas, a practice that had a deleterious impact upon the environment, deprived the indigenous inhabitants of work opportunities, and increased desertification. In 1968, to expand the operator base and to introduce more control over land allocation, crops, and farming methods, the government established the Mechanized Farming Corporation (MFC), an autonomous agency under the Ministry of Agriculture and Natural Resources. From 1968 through 1978, the IDA made three loans to the government to enable the MFC to provide technical assistance, credit for landclearing and machinery, and marketing aid to individual farmers and cooperative groups. The MFC also became the operator of state farms.

In the late 1970s, about 2.2 million hectares had been allocated for mechanized farming, and about 420,000 hectares more had been occupied without official demarcation. About 1.9 million hectares in all were believed to be under cultivation in any one season. Of the officially allocated land, more than 70 percent was held by private individuals. Private companies had also begun entering the field, and some allocations had been made to them. State farms accounted for another 7.5 percent. About 15 percent of the total allocated land was in MFC-IDA projects. The largest proportion of mechanized farming was in Ash Sharqi Province, 43 percent the next largest in Al Awsat Province, 32 percent and about 20 percent was in Aali an Nil Province. Mechanized farming had also been initiated in southern Kurdufan Province through a project covering small-scale farmers in the area of the Nuba Mountains, but under a different government program. Proposals also have been made for MFC projects using mechanized equipment in other areas of southern Kurdufan (some have already been tried) and southern Darfur provinces. There were serious feasibility problems in view of competition for land and conflicts with traditional farming practices, difficult soil conditions, and the probable negative effect on the large numbers of livestock of nomads.

Only a few crops had been found suitable for cultivation in the cracking clay area. Sorghum had been the principal one, and during the early 1980s it was planted on an average of about 80 percent of the sown area. Sesame and short-fiber cotton were also grown successfully but in relatively smaller quantities, sesame on about 15 percent of the land and cotton on about 5 percent. Soil fertility has reportedly been declining because of the continued planting of sorghum and the lack of crop rotation. Yields have apparently decreased, but in view of the area's greatly varying climatic conditions and the uncertain production data, definitive conclusions on trends appeared premature.

Data as of June 1991