Posted on August, 27, 2018 at 09:56 am
By Lominda Afedraru
Land degradation stemming from deforestation, burning of grasslands and organic residues as well as continuous cultivation with minimum soil fertility enhancement leads to soil erosion and organic matter and nutrient depletion.
Other unsustainable land-use practices such as overgrazing have produced compacted soil layers and often bare grounds in extreme cases.
Another underlying factor in the development of compacted soil layers is that hand-hoeing, which only disturbs the top layer when done consistently and regularly, can potentially produce restrictive layers.
Under these soil conditions, nutrient and water use efficiency is reportedly very low. These soil layers act as barriers to root and water movement and soil water holding capacity making land susceptible to the frequency and intensity of rainfall.
This affects agricultural land severely including inhibiting root and water movement hence limiting water infiltration and retention.
There has been concerted effort to address such challenges with Global Water Partnership Eastern Africa (GWPEA) being one of the stakeholder players.
Gerald Kairu from GWPEA explaining to Seeds of Gold about the concepts, principles and applications of efficient water usage notes that, in regard to land degradation and a total dependence on rain-fed agriculture, this has increased the vulnerability of farming systems and predisposed rural households to food insecurity and poverty.
He explains that water insecurity has led to significant adverse impacts on smallholder agro-ecosystems, including direct damage and loss of critical ecosystem services such as biodiversity.
There are efforts by ministry of agriculture in sensitising farmers to adopt new technologies to conserve water in the soil during the dry season in a bid to keep plants healthy. One such initiative is by Mukono Family Farmer’s Association located in Bugereka village who are practicing sustainable land management through adoption of minimum land tillage, permanent planning stations termed as basins and rip lines.
In an interview with Job Mpaata, the farmer leader of Mukono Farmers Association who has adopted these technologies on his farm and is in massive sensitization of his fellow farmers, he takes Seeds of Gold through it and below are excerpts.
Permanent planting basins
Seeds are planted not along the usual furrow but in small basins—these are small pits that can be dug with hand hoes without having to plough the whole field.
Planting basins are prepared across the slope of a field along the contour before rains. They enable the farmer to plant the crop after the first effective rains when the basins have captured rainwater and drained naturally.
Seeds are placed in each basin at the appropriate seeding rate and covered with clod-free soil.
It helps to capture storage of rain water and allows management of limited nutrient resources.
Prior to the establishment of the basins, the fields have to be slashed and sprayed with herbicide or simply slash and remove weeds two weeks to digging the permanent basins.
Permanent planting basins are designated using planting lines and digging planting basins 35cm long by 15cm wide and 15cm deep.
The spacing between basin holes is 75cm between rows and 70cm within rows from center-to-center. Farmers are expected to lay available crop residues between rows to create a mulch cover.
In case of groundnuts each basin is seeded with six seeds and farmers plant three maize seeds per basin and six bean seeds per basin. During planting the seeds are dropped into the basins which are half filled with soil and covered.
When rains start, it penetrates in the basin and is absorbed. This can last for three months and it will continue feeding the plant during dry season. This is advantageous in that the plant will germinate very fast and it will develop a deep root system thereby leading to increased yield.
Source: Daily Monitor