The benefits of mulching
The benefits of mulching

The benefits of mulching

Ashley Smith
ELLANIE SMIT

WINDHOEK

Mulching reduces the frequency of watering gardens or crop fields and therefore reduces the cost of water used in growing crops.

Hanks Saisai, technical advisor for crops and poultry in Agribank’s Agri-Advisory Service Division, says in countries such as Namibia where water is a scarce resource, it is always advisable for farmers to use water-conserving practices.

One common method to ensure water retention in fields or gardens is mulching.

Simply defined, mulching is the practice of covering the surface of the soil (seedbed) between growing crops or vegetables with a layer of material.

Saisai says mulching has several benefits and it is an efficient way of promoting water retention in the soil after irrigation.

Keep moist

Saisai says a prominent benefit of mulching is that it slows down the amount of soil moisture that is lost to evaporation.

“On very hot days, seedbeds or crop fields that have no cover on the surface of the soil between growing crops tend to suffer water losses due to evaporation, thus lowering the amount of soil moisture available to plant roots.”

When mulch is correctly placed on the surface, evaporation is reduced, thus minimising damage to vegetables due to dry soil as they approach maturity, explains Saisai.

Stay cool

Mulching also reduces the soil compaction caused by watering, rain and trampling when working in the garden. This improves water penetration in fields and gardens and reduces the chances of runoff, consequently preventing soil erosion.

“Mulching with a thickness of about 5 cm to 7.5 cm helps to prevent the germination and emergence of annual weeds by limiting the penetration of sunlight that is needed to stimulate the germination of most seeds,” says Saisai.

Furthermore, mulching insulates the soil to a considerable extent from extreme day and night temperatures, ensuring an ideal environment for soil micro-organisms that are vital in decomposing dead plant and animal materials to provide nutrients to the roots of crops and vegetables.

Saisai says when compost or manure is used as a mulch, it can provide a steady supply of nutrients to the roots.

Mulching also helps to reduce the greening effect of roots and tubers due to protection from prolonged exposure to sunlight.

“If you are in areas with scarce water supply or scorching day temperatures that limit your ability to successfully grow vegetables, it is recommended that you consider introducing mulching as a prudent practice to conserve soil moisture.”

Grass straws, palm leaves and black plastic sheets can be used as mulching materials.

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Namibian Sun 2024-03-28

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Katima Mulilo: 19° | 37° Rundu: 17° | 33° Eenhana: 18° | 33° Oshakati: 20° | 31° Ruacana: 19° | 33° Tsumeb: 17° | 29° Otjiwarongo: 16° | 28° Omaruru: 18° | 31° Windhoek: 17° | 28° Gobabis: 17° | 28° Henties Bay: 16° | 19° Wind speed: 24km/h, Wind direction: S, Low tide: 10:54, High tide: 04:57, Low Tide: 22:58, High tide: 17:16 Swakopmund: 15° | 17° Wind speed: 29km/h, Wind direction: SW, Low tide: 10:52, High tide: 04:55, Low Tide: 22:56, High tide: 17:14 Walvis Bay: 16° | 22° Wind speed: 33km/h, Wind direction: SW, Low tide: 10:52, High tide: 04:54, Low Tide: 22:56, High tide: 17:13 Rehoboth: 18° | 29° Mariental: 22° | 32° Keetmanshoop: 21° | 34° Aranos: 21° | 31° Lüderitz: 15° | 29° Ariamsvlei: 23° | 34° Oranjemund: 15° | 21° Luanda: 27° | 30° Gaborone: 20° | 32° Lubumbashi: 17° | 24° Mbabane: 15° | 23° Maseru: 12° | 28° Antananarivo: 16° | 27° Lilongwe: 17° | 29° Maputo: 20° | 28° Windhoek: 17° | 28° Cape Town: 17° | 23° Durban: 21° | 25° Johannesburg: 18° | 28° Dar es Salaam: 26° | 32° Lusaka: 18° | 30° Harare: 15° | 31° Currency: GBP to NAD 23.96 | EUR to NAD 20.53 | CNY to NAD 2.63 | USD to NAD 19.03 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.8 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 134.35 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.3 | USD to KES 130.98 | USD to NGN 1415.13 | USD to ZAR 19.02 | USD to ZMW 24.97 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 73909.5 Up +0.41% | Namibian Stock Exchange (NSX) Overall Index 1516.02 Down -0.13% | Casablanca Stock Exchange (CSE) MASI 12981.98 Up +0.34% | Egyptian Exchange (EGX) 30 Index 28224.37 Down -2.87% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 212.07/OZ UP +0.97% | Copper US$ 3.98/lb DOWN -0.0008 | Zinc US$ 2 446.40/T DOWN -0.41% | Brent Crude Oil US$ 86.78/BBP UP +0.45% | Platinum US$ 898.23/OZ UP +0.37% Sport results: Weather: Katima Mulilo: 19° | 37° Rundu: 17° | 33° Eenhana: 18° | 33° Oshakati: 20° | 31° Ruacana: 19° | 33° Tsumeb: 17° | 29° Otjiwarongo: 16° | 28° Omaruru: 18° | 31° Windhoek: 17° | 28° Gobabis: 17° | 28° Henties Bay: 16° | 19° Wind speed: 24km/h, Wind direction: S, Low tide: 10:54, High tide: 04:57, Low Tide: 22:58, High tide: 17:16 Swakopmund: 15° | 17° Wind speed: 29km/h, Wind direction: SW, Low tide: 10:52, High tide: 04:55, Low Tide: 22:56, High tide: 17:14 Walvis Bay: 16° | 22° Wind speed: 33km/h, Wind direction: SW, Low tide: 10:52, High tide: 04:54, Low Tide: 22:56, High tide: 17:13 Rehoboth: 18° | 29° Mariental: 22° | 32° Keetmanshoop: 21° | 34° Aranos: 21° | 31° Lüderitz: 15° | 29° Ariamsvlei: 23° | 34° Oranjemund: 15° | 21° Luanda: 27° | 30° Gaborone: 20° | 32° Lubumbashi: 17° | 24° Mbabane: 15° | 23° Maseru: 12° | 28° Antananarivo: 16° | 27° Lilongwe: 17° | 29° Maputo: 20° | 28° Windhoek: 17° | 28° Cape Town: 17° | 23° Durban: 21° | 25° Johannesburg: 18° | 28° Dar es Salaam: 26° | 32° Lusaka: 18° | 30° Harare: 15° | 31° Economic Indicators: Currency: GBP to NAD 23.96 | EUR to NAD 20.53 | CNY to NAD 2.63 | USD to NAD 19.03 | DZD to NAD 0.14 | AOA to NAD 0.02 | BWP to NAD 1.33 | EGP to NAD 0.39 | KES to NAD 0.14 | NGN to NAD 0.01 | ZMW to NAD 0.74 | ZWL to NAD 0.04 | BRL to NAD 3.8 | RUB to NAD 0.2 | INR to NAD 0.23 | USD to DZD 134.35 | USD to AOA 832.63 | USD to BWP 13.71 | USD to EGP 47.3 | USD to KES 130.98 | USD to NGN 1415.13 | USD to ZAR 19.02 | USD to ZMW 24.97 | USD to ZWL 321 | Stock Exchange: JSE All Share Index 73909.5 Up +0.41% | Namibian Stock Exchange (NSX) Overall Index 1516.02 Down -0.13% | Casablanca Stock Exchange (CSE) MASI 12981.98 Up +0.34% | Egyptian Exchange (EGX) 30 Index 28224.37 Down -2.87% | Botswana Stock Exchange (BSE) DCI Same 0 | NSX: MTC 7.75 SAME | Anirep 8.99 SAME | Capricorn Investment group 17.34 SAME | FirstRand Namibia Ltd 49 DOWN 0.50% | Letshego Holdings (Namibia) Ltd 4.1 UP 2.50% | Namibia Asset Management Ltd 0.7 SAME | Namibia Breweries Ltd 31.49 UP 0.03% | Nictus Holdings - Nam 2.22 SAME | Oryx Properties Ltd 12.1 UP 1.70% | Paratus Namibia Holdings 11.99 SAME | SBN Holdings 8.45 SAME | Trustco Group Holdings Ltd 0.48 SAME | B2Gold Corporation 47.34 DOWN 1.50% | Local Index closed 677.62 UP 0.12% | Overall Index closed 1534.6 DOWN 0.05% | Osino Resources Corp 19.47 DOWN 2.41% | Commodities: Gold US$ 2 212.07/OZ UP +0.97% | Copper US$ 3.98/lb DOWN -0.0008 | Zinc US$ 2 446.40/T DOWN -0.41% | Brent Crude Oil US$ 86.78/BBP UP +0.45% | Platinum US$ 898.23/OZ UP +0.37%