Lu$n van tot nghiep Do ThiBichLoan
2.1.1.2.Dia hinh, tho nhitang
Bac Quang cd dia hinh phuc tap mang dac diem dien hinh cua huyen mien nui, be mat khong bang phang, bao quanh nhieu doi nui, o trung bac thang. Do vay, noi day rat thuan loi cho viec phat trien he thong nong lam ket hop cd hieu qua va phong phu. Dia hinh cua huyen cd the chia lam hai loai chinh khac nhau ro ret:
- Dia hinh viing nui cao bao gom cac day nui va doi bat up nam ve phfa
Bac, Tay Bdc, Dong va Dong Bac cua huyen, cao trung binh tir 300-500 m, do doc phd bien tir 15-30°. Dja hinh bi chia cat manh, song suoi cd do doc ldn tao ra nhieu ti6u vung vdi dac diem khf hau khac nhau.
- Dia hinh bang thoai ven song la cac dai dat doc theo Song Lo, chay tir Bac Quang den VInh Tuy. Cao trung binh quan 8 0 -150m, do doc pho bien tir
5-15°, Dac diem noi bat la dat kha bang phdng, thuan loi cho viec phat trien cay luong thuc va cay an qua.
Toan bo lanh tho huyen chia thanh 5 tieu viing sinh thai nong lam nghiep: + Tieu viing I gom 6 xa va 1 thi tran doc theo quoc lo 2. The manh cua tieu viing nay la phat trien cac loai cay luong thuc (liia, ngo, khoai) cay cong nghiep dai ngay (che, ca phe, que'...) cay an qua co mui (cam, quyt, buoi....) va chan nuoi gia sue. Cac trung tarn cum xa Bdc Quang, VTnh Tuy dang tirng bu6c hinh thanh trung tarn kinh t e - x a hoi cua huyen; cac co so che bien nong lam san, cong nghiep xay dung va dich vu co dieu kien de phat trien.
+ Tieu viing II gom 6 xa phfa Dong cua huyen: Day la vung co nhieu tiem nang dat dai nhung kinh te con cham phat trien. Tiem nang phat trien cua cac loai cay luong thuc (lua) cay cong nghiep dai ngay va cay an qua, cay lam nghiep nguyen lieu giay, chan nuoi dai gia sue (trau, de) la con rat Ion.
+ Tieu vung III gom 8 xa phfa Tay cua huyen. The manh cua viing nay lua, ngo cay an qua (cam, quyt, vai, nhan...) cay nguyen lieu giay, cay nong nghiep dai ngay (que, tram, ca phe...) chan nuoi Ion, trau, ca. Trong mot tuong lai gan, co the hinh thanh 6 day cac trung tarn kinh te - djch vu (Dong Yen, Xuan Giang, VInh Phuc....) che bien nong lam san va san xuat vat lieu xay dung.
+ Tieu viing IV gom 5 xa vung giua cua huyen voi uu the ve cay nguyen lieu giay, cay cong nghiep dai ngay (che, que'), cay an qua (cam, quyt) va chan nuoi dai gia sue (trau bo).
+ Tieu vung V gom 5 xa vung sau, viing xa cua huyen. The manh cua vung nay la cay nguyen lieu gia'y, cay cong nghiep dai ngay (che) va chan nuoi dai gia sue.
M6i tieu viing deu co the manh rieng nhung the manh do chua duoc khai thac tot nen con o dang kern phat trien va hieu qua kinh te con thap.