Protecting the soil with a cover crop

I’m going to miss the kind people of Montserrat. It’s been a valuable experience, providing the opportunity to catch up with a relative on my mother’s side. It was also very relaxing, quite a break from my usual schedule of activities. On a serious note, I am concerned about the long term prospects of the smaller islands in this region. The soil fertility is extremely good as indicated by the brightness and vigour of Montserrat’s vegetation. Like most tropical soils, the bulk of nutrients are carried near the surface and recycled at a high rate. Heavy rains combined with warmer temperatures and human activity contribute to partial erosion while the distribution of volcanic particles may gradually increase soil acidity. I’m not familiar with the precise chemistry but have been told that its like running an engine too hot. Once the equilibrium tilts, it could be a long decline.

Unlike Montserrat, the majority of our soil problems are generated by ill considered farming and haphazard approaches to landcare. I’m still occassionally confronted by one of the gum boot brigade and told that it’s impossible to grow pasture or grains without bulk quantities of chemical fertiliser. When I explain my organic approach they appear to listen but then dismiss it out of hand. Okay for a few vegetable gardens, they suggest. Won’t do for an entire field of oats or corn. Needs more nitrogen.

Legume and green crops are the best and most efficient means to promote nitrogen availability in a compromised soil. There have been plenty of scientific studies to prove this and anyone tuned into their land knows it from experience. During their winter growing phase, these crops provide a valuable cover, protecting soils against erosion and mineral leaching. After several months, they can be incorporated into the soil, thereby contributing additional organic matter and improving texture in a way that allows air and moisture to be evenly distributed. Can a chemically manufactured mineral compound accomplish this? Of course not.

Next stop Brisbane, where I’m told there’s a cricket test in progress.