SABI Magazine - Tydskrif - latest Issue
Volumes & issues
Volume 9, Issue 3, Feb / Mar 2017
Source: SABI Magazine - Tydskrif 9, pp 2 –2 (Feb / Mar 2017)More Less
The Western Cape is battling through a terrible drought, and with water levels in dams at a critical level, our prayers for rain reverberate daily here in the beautiful Cape. A few months ago I noticed some people still watering – with sprinklers in the middle of the day – their grass on the pavements! Incredible: you wonder what planet they have been living on, appearing blissfully ignorant to the dire situation of water. Actually grassy pavements in semi-arid South Africa are somewhat of a luxury.
Source: SABI Magazine - Tydskrif 9, pp 4 –9 (Feb / Mar 2017)More Less
A lot of attention and hope is focussed right now on Africa’s agricultural sector’s future.
The crowd at Davos in Switzerland at the annual World Economic Forum discussed the invigorating topic of farms in Africa, perhaps making a change to discussing populism and Brexit in the Northern hemisphere. It was observed at Davos that agriculture could be boosted by improving access to electricity and improved Internet connectivity.
Source: SABI Magazine - Tydskrif 9, pp 10 –11 (Feb / Mar 2017)More Less
Source: SABI Magazine - Tydskrif 9, pp 12 –14 (Feb / Mar 2017)More Less
Close Spacing irrigation with LEPA (Low Energy Precision Application) applicators can save water, reduce energy consumption, and increase yields by providing more available water to plants at lower pressures. Following successful results in 2015 on the Triple D Ranch in Dyer, Nevada USA, comparison testing was initiated to obtain more information.
In 2016, testing was initiated on alternating spans of moving deflector sprinklers and Senninger LDNs with LEPA pads and Shrouds in order monitor the effects of both sprinklers. Moving deflector sprinklers were installed at 120-inch spacing. LEPA applicators were installed at 30 to 40 inch (76 to 101.6 cm) spacing.
The LEPA applicators provided more water to the plants. This could be attributed to the reduced energy of the water making it more resistant to wind drift and evaporation. Low pressure operation provided additional savings in the form of reduced energy required to pump the water. In addition, the close spacing of the LEPA sprinkler heads greatly diminished burrowing varmint damage to fields by creating an undesirable habitat.
Source: SABI Magazine - Tydskrif 9, pp 15 –15 (Feb / Mar 2017)More Less
With an estimated combined investment of around R21 million over three years, the Connected Farmer platform, a cloud-based web and mobile software solution recently launched by Vodacom, will link thousands of smallholder farmers to the agriculture value chain, enabling access to information, services and markets.
Source: SABI Magazine - Tydskrif 9, pp 16 –19 (Feb / Mar 2017)More Less
From farming to movie-making and catching rhino poachers, drones are proving the means for powerful bird’s eye views in a variety of sectors.
As farming reflects the international trend to high-tech agriculture, it’s not surprising that drones are being increasingly utilised for the ultimate bird’s eye view of matters on the farm.
Source: SABI Magazine - Tydskrif 9, pp 20 –20 (Feb / Mar 2017)More Less
Source: SABI Magazine - Tydskrif 9, pp 22 –22 (Feb / Mar 2017)More Less
The Cloud Security Alliance (CSA), the world’s leading organization dedicated to defining and raising awareness of best practices to help ensure a secure cloud computing environment, together with Securing Smart Cities, a not-for-profit global initiative that aims to solve the existing and future cyber security problems of smart cities, recently announced the release of the Establishing a Safe and Secure Municipal Drone Program report. The new 28-page report, co-authored by the CSA Internet of Things (IoT) Working Group, provides guidance for the safe and secure creation and operation of a municipal drone program by analyzing the drone’s role and impact on future metropolitan areas.
Source: SABI Magazine - Tydskrif 9, pp 23 –23 (Feb / Mar 2017)More Less
Author Gareth GregorySource: SABI Magazine - Tydskrif 9, pp 26 –27 (Feb / Mar 2017)More Less
The purpose of this article is to share insight on the less known facts about the South African energy sector. This is the first of a series of articles that will build your knowledge and give you decision making power by providing broader insight than mere kWh (kilowatt electricity unit) and fixed charge calculations.
Source: SABI Magazine - Tydskrif 9, pp 28 –28 (Feb / Mar 2017)More Less
Source: SABI Magazine - Tydskrif 9, pp 29 –29 (Feb / Mar 2017)More Less
As a country, we are still grappling with the impacts of mining, industrial development, and large-scale commercial agriculture and forestry on our wetlands, but we should in essence now be moving into an era of ‘wise use’, or at least people-centred wetland management.
Author Mike de VilliersSource: SABI Magazine - Tydskrif 9, pp 30 –32 (Feb / Mar 2017)More Less
This editorial describes the filtration process as well as the procedure to service a manual disc filter. The procedures have been based on one of the most extensively used manual filters being the Arkal 2 inch Dual model. Other models of filters and especially alternative brands will use different procedures, however the underlying basic maintenance systems remain the same for all disc filters.
Source: SABI Magazine - Tydskrif 9, pp 33 –33 (Feb / Mar 2017)More Less
Author Pieter van HeerdenSource: SABI Magazine - Tydskrif 9, pp 34 –39 (Feb / Mar 2017)More Less
Earth has so much water, covering two-thirds of its surface area, giving it a blue appearance when seen from outer space. Yet, only a very small portion (0.00018%) of this vast quantity of water is fresh and is found in rivers and streams and can therefore be readily used by man for his requirements. This water must satisfy most of man’s personal needs: for producing food and fibre (FAO, 2002); industrial production and for maintaining the environment (Wikipedia, 2012a). Water, through its scarcity, especially in water stressed countries, has the potential to become a reason for future conflict. This potential problem is aggravated by the world-wide exponential increase in human population and the resultant ever increasing pressure on fresh water resources (Alois, 2007).