Exchange Irrigation Scheme
Exchange Irrigation Scheme is a irrigated arable land in Zhombe Communal Land but in Silobela constituency in Kwekwe District of the Midlands Province of Zimbabwe. It is southwest of Zhombe Joel, northwest of Kwekwe and north of Crossroads DSC.
It is in region 3; the climatic conditions are semi-arid with an average yearly rainfall of. Estimated elevation is above sea level.
Background
Exchange Irrigation Scheme developed in two phases. The first phase in 1973 developed to supplement to farmers who had been resettled on of dry land per household.Plot holders then had a "comma" as it is popularly known. One hectare is 10 commas.
Phase 2 of the scheme rehabilitated a further. The second phase saw allocation of commas to new farmer and addition of commas to existing farmers. In 1997 there were 850 plot holders with an average of per farmer.
Water source
It is fed by Exchange Dam which is on the Gweru River. Gweru River is a tributary of Shangani River. Exchange Dam is the biggest reservoir in Gweru River, followed by Insukamini Dam in Lower Gweru.Exchange Dam, sometimes called Exchange Block Dam was built in 1972 primarily for irrigation. Its full capacity is 9 million cubic metres.
Objectives
Primary objectives of the irrigation scheme was to equip farmers with a basic source of income materially and cash. Farmers could earn at least a sum equivalent to the government gazetted minimum wage by selling sweet green grocery produced from the irrigated land.Beneficiaries
About 900 farmers and their families who live near Exchange Irrigation Scheme are the primary beneficiaries of the scheme.Most of the surrounding farmers have dry land rain-fed fields averaging 2.5 hectares. Livestock of these farmer also benefit by foraging at the adjacent bush that is evergreen and watered by spillage irrigation water.
Management
The scheme was developed by Agritex, a department of the Ministry of Agriculture.It is managed by the scheme management committee elected by participating farmers from among their members.
Maintenance is carried out by civil servants at the scheme in unison with the management committee, Agritex officers and plot holders.
Irrigation
Irrigation water is pumped from the Exchange Block Dam into a night storage reservoir before being canal distributed into two other reservoirs further into the scheme for surface flooding of plots. Unlike Ngondoma Irrigation Scheme on the other side of Zhombe, this scheme water is driven by electric pumps.The plots are each and are arranged in blocks of to each. There are 6 blocks in total covering all the 165 active arable hectares.
The tertiary offtake gates are operated by hand by either the civil servants or members of the management committee. Water is shared evenly at one day per week for each block of the six blocks.
Sunday is reserved for night storage top-ups and for watering nursery beds in any block.
Irrigation seasons
July–February is maize corn season and March–June is the beans and tomato season.Yields
Normally yields are of corn per hectare and more than for beans.At the market prices of $0.43/kg for green maize and $1.50/kg for beans, the two crops have a value of $3000/ha for maize and $1500/ha for beans, giving a combined harvest value of $4500/ha per year.
The values quoted above are based on the following;
700 kg per comma. Green maize is usually sold in dozens and a dozen has an average of 7 kg. With this assumption 1 comma would sell for US$300 at US$3 per dozen.
1000 kg/ha to 1200 kg/ha beans. That is 100 kg to 120 kg per comma of beans. Beans usually sell at US$1.50 per kg..