Răspunsuri

2014-10-08T10:49:20+03:00
A = 350 * 20 = 7000 m²
1 ha = 10000 m²
10000 m²..........200 kg
 7000 m²............x
________________________
x = 7000 * 200 : 10000 = 140 kg seminte
44 4 44