Despite the availability of scientific methods in agriculture and animal husbandry, present methods of farming tend to yield a much smaller percentage than is potentially feasible with proper crop rotation, more plant varieties, plant nutrients, fertilisers and proper pest control. In many villages in the developing nations only a little over 50% of the arable land is used for agricultural production, which leaves much land uncultivated that could possibly produce profitable crops. In many rural areas, even with plentiful rainfall, dependence on subsistence farming has resulted in only short-range agricultural planning.
With existing traditional farming methods, it is difficult to meet family food requirements. Continuous soil erosion, limited means of fertilization, inadequately cultivated fields, and uncontrolled grazing practices all work to create minimally-productive farmland. Farmers tend to have little experience in poultry-keeping or in mechanized farming methods because of the inaccessibility of training centres where they might learn modern farming methods.
Because of the low-yield farming methods, much of the village employment is cyclical rather than continual. Sometimes residents are blocked by outside ownership which controls their markets and brings minimal economic returns to the farmer. Land cultivation is often done with animal powered-single furrow ploughs; the farmers depend on regular rains to supply water where there is no irrigation system. Chickens, pigs, goats, cows, geese, ducks and rabbits live in family yards and are raised for home consumption only - these animals freely forage for food throughout a village since there is usually no common grazing land. Without proper upbreeding of present stock and a larger variety of animals, profitable animal husbandry is not possible.
[Developing countries] Agricultural activities in the least developed countries have been characterized by low yields. The use of fertilizers is still very modest and production techniques are primitive. The whole area under irrigation represents less than one-tenth of the total arable land used, while the remainder is dependent on rainfall.
Major constraints to increased agricultural output in the developing world are the unavailability of adequate land and a lack of incentives for farmers to produce more. In many developing countries, small farmers produce the basic food crops; and it is not possible to increase food production significantly without giving them priority in the distribution of land, water, credit, fertilizers, energy and other production inputs. Although some countries could increase output by concentrating on larger modern farms, this would not benefit the income or employment prospects of small farmers.
In many developing countries governments have manipulated the level of food imports and food prices in favour of urban dwellers. This has often occurred at the expense of fair returns for the rural population. Cheap food policies and large imports of wheat have resulted in increased imbalance between rural and urban incomes and discourage farmers from growing more food. As a whole, the developing countries' agricultural sectors need improvements in transport, housing, water and education. In many cases national policies discriminate against agriculture and discourage production.
Latin America remains divided between latifundia too large for the entrepreneurial competence of their owners and minifundia too small even for subsistence. Many parts of Africa still have to invent acceptable and workable post-tribal forms of food production for the market. In the Indian subcontinent, managerial skills are only beginning to be sufficiently eveloped for decisive increases in productivity. Food production in the developing countries in general is not able to do more than keep pace with the growth of population at the old, inadequate levels of diet; this modest increase is not sufficient to offer a comparable rise in employment for the new millions born on the land. In Latin America, for instance, the economically active population grew from 32.5 million to 86.2 million between 1925 and 1960; farming offered only 12 million new jobs. Urban areas had to absorb the balance. The recent dramatic advances in agricultural production through the use of hybrid grains, coupled with improved fertilizer and irrigation practices, are changing this discouraging record. But at best they can only relieve the food shortage for about two decades, a short respite for achieving a better balance between population and resources.