Table 5: Initial construction costs of the selected storage systems (storage losses are not included) [35].

Storage system for square bales (950 lb/bale)Cost per m2 ($)Life yearsAnnual costs ($/m2)Cost per bale ($)Cost per ton ($)

Collective storage facility107.6415 12.5810 bales high10 bales high
3.777.95
Pole frame structure-enclosed on crushed rock70.39–107.64158.22–12.585 bales high
4.93–7.55
6 bales high
4.11–6.29
5 bales high
10.39–15.89
6 bales high
8.66–13.24
Reusable tarp on crushed rock (19.8 sq. ft/bale i.e., 1.84 m2/bale)1.475 0.374 bales high4 bales high
1.392.92
Outside Unprotected on crushed rock2.7050.680.511.07
Outside and unprotected on ground 0.000.000.000.00