Normai kisht

Normai kisht, meyori muayyani kishti tukhmist ba 1 ga. Normai kisht ba navi ziroat, hosilkhezii zamin, tukhmi, muhlat, usulhoi kisht va gayra vobasta ast. Normai kishti yak namudi ziroat niz gu­nogun shudanash mumkin. Macolan, Normai kishti ziroati silosbob nazar ba ziroati galla ziyod ast. Normai kisht baroi nohiyahoi shimoli SSSR nazar ba nohiyahoi janub ziyodtar meboshad. Macalan, Normai kishti gandumi bahori baroi nohiyakhoi shimoli 6—7 mln dona tukhmi (ba 1 ga), baroi nohiyahoi janubu sharrqi 3,5—5 mln do­na tukhmi muqarrar shudaast.

Tukhmi boyad 100% nesh zanad. Masalan, agar Normai kishti tukhmi 4 mln dona boshadu 94%-i tukhmi nesh zanad, on goh meyori kishti on in tavr meshavad:

                = 4,4 mln dona

Baroi ba hisob giriftani vazni tukhmi odatan, shumorai tukhmiro ba vazni 1000 dona zarb mezanand. Agar vazni 1000 dona tukhmi 40 g boshad, on goh Normai kishti tukhmi 4,4 mln • 40 = = 176 kg meshavad.