问题:Vergara(1981)根据系统组分的配置方法、时空排列的系统组分所占的比例,将农林复合系统分为哪几种类型?...
Wednesday, March 13, 2024
问题:水网地区林——渔——农复合经营,按水面规格大小一般可分为哪几种类型?...
Friday, January 26, 2024
Wednesday, March 13, 2024
Friday, January 26, 2024
Wednesday, January 3, 2024
Friday, January 26, 2024
Wednesday, March 13, 2024
Wednesday, March 13, 2024
问题:竞争与互利的综合作用下,农林复合系统中不同生物组分间会出现哪几种类型的效应?...
Wednesday, March 13, 2024
问题:“三北”农牧区以林为主的林——草复合有哪几种经营方式?简述之。...
Wednesday, March 13, 2024
问题:北方林区林药复合型中,林——参间作的类型有哪三种?...
Sunday, January 21, 2024
问题:试述我国平原农区典型复合农林业模式及地域发展特点。...
Sunday, January 21, 2024
Friday, January 26, 2024
Wednesday, March 13, 2024
问题:在南方丘陵山地存在10多种林——药复合经营类型,其中林——黄连间作主要是利用黄连与林地的哪些特性所形成的复合类型?...
Sunday, January 21, 2024
Friday, January 26, 2024
问题:北方林区林药复合型中,林——参间作的类型有哪三种?...
Sunday, January 21, 2024
Wednesday, March 13, 2024
Wednesday, March 13, 2024
问题:水网地区林——渔——农复合经营,按水面规格大小一般可分为哪几种类型?...
Wednesday, March 13, 2024