For example where chemical fertilisers cost to much, organic manures can provide free and healthy fertiliser while increasing the organic matter of the soil. Increase productivity To increase the productivity and sustainability of rain-fed farming , farmers should pick the old , strong varieties of plants that are adapted to the local conditions . Growing two or more crops together can also increase productivity if the crops are carefully chosen . Use pesticides and fertilisers cautiously and wisely. In the low-income , developing countries 10000 people die a year from pesticide poisoning while another 40000 get very sick.
Pesticides also kill many beneficial animals.
Chemical fertilisers alone cannot conserve the soil as they discourage the growth of micro-organisms so essential for a healthy soil system.