SOUTH AFRICAN private sector activity expanded at a faster pace in March compared with February, helped by growth in employment and new orders, a survey showed on Tuesday. The S&P Global South Africa Purchasing Managers' Index (PMI) rose to 51.4 in March from 50.9 in February, posting its highest reading in four months. Anything above 50.0 indicates growth in the sector. The employment index showed expansion for the first time in four months and at the strongest rate since June last year, while new orders climbed as well, albeit at a slower pace. But the rise in the headline PMI…