Music |

Healthy soil

The basis of good, productive soil is a good porous crumb structure with an ideal composition of one third soil, one third
air and one third moisture. However, on many farms, this basis is far from achieved and we often find extremely dense
soil profiles and, varying in depth, even hard, obstructive layers, resulting in a lack of oxygen, bad rooting, disrupted
water management and reduced soil strength.

Soil research
Following on from the work of Johannes Görbing (1877-1946), O. J. Cleveringa (1890-1980) and Johannes Bron (1920-1989) we also use the ‘Spade Test’ (spatendiagnose) developed by Görbing in our soil research in the 21st century. The spade test is a unique, visual observation method with which the plant/ soil relationship can be studied, thus contributing to producing ‘living soil’ as the basis of optimum soil fertility and sustainable agriculture.

In the Spade Test, profile pits are dug and special attention is paid to the relationship between the visually observed soil structure and the root systems of plants. This enables us to track down structure defects. The effect of structure defects (e.g. obstructive layers) on the growth of grass and plants is clearly and attractively displayed by such things as root development. 

Knowledge of the rooting of plants is the basis of healthy agriculture and horticulture. The Spade Test gives us a faithful picture of the processes going on underground in relation to the growth of the plant above ground.

 Burying a Broncorrector on a fruit farm.
1 | 2 | 3 | >
 Ready for transport.
< | 1 | 2 | 3 | >
On these infrared photographs of a field of grass/clover, the limit of the Broncorrector’s effect action-radius is clearly visible. The area affected is purple – representing more vital and dense vegetation – while the area outside is a lighter, white colour.
< | 1 | 2 | 3 |