Cultivable Area    Back to the Index       Cultivable Area Calculator (including animal areas)       Cultivable Area Calculator (excluding animal areas)    Cultivable Area What does it do? These calculators measure the land constraint. There are two calculators. One estimates the area of land on a farm which can be used for crop production, including animal production. The other calculates the area of cultivable land excluding animal production areas. Information used Information supplied by the user includes: the total area of the farm (t) area of buildings & yards in square metres (b) areas which cannot be used for crops (waste, rocks) (w) area of paths and roadways in farm (r) area dedicated to animal production (a) the number of separate fields or plots (p) the average turning circle of equipment (t) Formulae Cultivable area including animal areas: Gross cultivable area in square metres c = 10,000(t-(b/10,000)-w-r) Net cultivable area n = ((c/p)-(4xtxSQRT(c/p))-(20t))x(p/10,000) Cultivable area excluding animal areas: Gross cultivable area in square metres c = 10,000(t-(b/10,000)-w-r-a) Net cultivable area n = ((c/p)-(4xtxSQRT(c/p))-(20t))x(p/10,000)